23. PARTS LIST 4- 2 001-3282-101/102 C 222 610-3675-103 .01MF X7R K 0603 CHPR C 230 610-3674-220 22pF 5% NPO 0603 C 231 610-3674-220 22pF 5% NPO 0603 C 232 610-3609-104 .1UFD X7R J 1206 RL C 233 610-2625-220 22UFD 16V SMD TANT RL C 234 610-3609-104 .1UFD X7R J 1206 RL C 235 610-3609-104 .1UFD X7R J 1206 RL C 240 610-9224-011 4.7UF, 16V,SMD A,20%, TAN C 241 610-9224-011 4.7UF, 16V,SMD A,20%, TAN C 242 610-3609-473 .047UF X7R J1206CHP RL C 243 610-2628-338 .33UFD 35V SMD TANT RL C 244 610-2628-338 .33UFD 35V SMD TANT RL C 245 610-2628-338 .33UFD 35V SMD TANT RL C 250 610-3606-105 1uf 16V 1206 CHIP CAP C 251 610-3674-680 68pF 5% NPO 0603 C 400 610-3609-104 .1UFD X7R J 1206 RL C 401 610-3675-103 .01MF X7R K 0603 CHPR C 402 610-3675-103 .01MF X7R K 0603 CHPR C 403 610-3674-101 100pF 5% NPO 0603 C 404 610-3674-680 68pF 5% NPO 0603 C 405 610-3675-102 .001uF 10% X7R 0603 C 406 610-3674-101 100pF 5% NPO 0603 C 407 610-3675-103 .01MF X7R K 0603 CHPR C 408 610-3675-102 .001uF 10% X7R 0603 C 450 610-3609-104 .1UFD X7R J 1206 RL C 451 610-3675-102 .001uF 10% X7R 0603 C 452 610-3675-103 .01MF X7R K 0603 CHPR C 453 610-3675-103 .01MF X7R K 0603 CHPR C 454 610-3674-221 220pF 5% NPO 0603

24. PARTS LIST 4- 3 001-3282-101/102 C 455 610-3675-102 .001uF 10% X7R 0603 C 456 610-3675-103 .01MF X7R K 0603 CHPR C 457 610-3675-103 .01MF X7R K 0603 CHPR C 458 610-9224-011 4.7UF, 16V,SMD A,20%, TAN C 459 610-9224-011 4.7UF, 16V,SMD A,20%, TAN CR 220 649-4001-215 DUAL COLOR, RED/GRN LED, CR 400 623-2016-919 SI 9.1V ZENER SOT23 EP 250 617-2503-010 FERRITE BEAD SMD 1233 F 250 634-5000-115 1.5AMP FUSE SMD VERY FAST L 250 642-9008-109 1.0 UHY SMT POWER INDUCTO PC 001 035-3282-350 3282 LTR MODEM PCB Q 250 676-0003-657 XSTR,SI,PNP,SOT-23 Q 251 676-0003-658 XSTR, SI,NPN SOT-23 Q 252 676-0003-658 XSTR, SI,NPN SOT-23 Q 253 676-0003-658 XSTR, SI,NPN SOT-23 Q 254 676-0003-658 XSTR, SI,NPN SOT-23 Q 255 676-0003-658 XSTR, SI,NPN SOT-23 Q 256 676-0003-658 XSTR, SI,NPN SOT-23 R 200 669-0155-104 100k OHMS J 063W 0603 CHI R 210 669-0155-104 100k OHMS J 063W 0603 CHI R 211 669-0155-104 100k OHMS J 063W 0603 CHI R 212 669-0155-104 100k OHMS J 063W 0603 CHI R 213 669-0155-104 100k OHMS J 063W 0603 CHI R 214 669-0155-104 100k OHMS J 063W 0603 CHI R 215 669-0155-104 100k OHMS J 063W 0603 CHI R 216 669-0155-104 100k OHMS J 063W 0603 CHI R 217 669-0155-104 100k OHMS J 063W 0603 CHI R 218 669-0155-104 100k OHMS J 063W 0603 CHI R 220 669-0155-104 100k OHMS J 063W 0603 CHI

1. S e r v i c e M a n u a l DL-3282 1200 Baud Modem Part Number : 250-3282-002

25. PARTS LIST 4- 4 001-3282-101/102 R 221 669-0155-104 100k OHMS J 063W 0603 CHI R 222 669-0155-104 100k OHMS J 063W 0603 CHI R 223 669-0155-104 100k OHMS J 063W 0603 CHI R 224 669-0155-225 2.2 M OHM J 063W 0603 CHI R 225 669-0155-222 2.2K OHMS J 063W 0603 CHI R 227 669-0155-472 4.7K OHM J 063W 0603 CHIP R 230 669-0155-104 100k OHMS J 063W 0603 CHI R 231 669-0155-225 2.2 M OHM J 063W 0603 CHI R 232 669-0155-104 100k OHMS J 063W 0603 CHI R 240 669-0155-390 39 OHM J 0603 CHIP/R R 248 669-0155-472 4.7K OHM J 063W 0603 CHIP R 249 669-0155-222 2.2K OHMS J 063W 0603 CHI R 250 669-0155-222 2.2K OHMS J 063W 0603 CHI R 251 669-0155-103 10K OHMS J 063W 0603 CHIP R 252 669-0155-103 10K OHMS J 063W 0603 CHIP R 253 669-0155-103 10K OHMS J 063W 0603 CHIP R 254 669-0155-104 100k OHMS J 063W 0603 CHI R 255 669-0155-473 47K OHMS J 063W 0603 CHIP R 256 669-0155-473 47K OHMS J 063W 0603 CHIP R 257 669-0155-104 100k OHMS J 063W 0603 CHI R 258 669-0155-473 47K OHMS J 063W 0603 CHIP R 259 669-0155-473 47K OHMS J 063W 0603 CHIP R 260 669-0155-104 100k OHMS J 063W 0603 CHI R 261 669-0155-473 47K OHMS J 063W 0603 CHIP R 262 669-0155-473 47K OHMS J 063W 0603 CHIP R 263 669-0155-473 47K OHMS J 063W 0603 CHIP R 264 669-0155-473 47K OHMS J 063W 0603 CHIP R 265 669-0155-473 47K OHMS J 063W 0603 CHIP R 266 669-0155-473 47K OHMS J 063W 0603 CHIP

26. PARTS LIST 4- 5 001-3282-101/102 R 267 669-0155-473 47K OHMS J 063W 0603 CHIP R 268 669-0155-473 47K OHMS J 063W 0603 CHIP R 269 669-0155-473 47K OHMS J 063W 0603 CHIP R 270 669-0155-390 39 OHM J 0603 CHIP/R R 271 669-0155-390 39 OHM J 0603 CHIP/R R 272 669-0155-390 39 OHM J 0603 CHIP/R R 275 669-0155-390 39 OHM J 0603 CHIP/R R 400 662-0130-104 100K SMD TRIMMER R 401 669-0155-153 15k OHMS J 063W 0603 CHIP R 402 669-0155-563 56K OHMS J 063W 0603 CHIP R 403 669-0155-684 680K OHM J 063W 0603 CHIP R 404 669-0155-684 680K OHM J 063W 0603 CHIP R 405 669-0155-184 180K OHMS J 063W 0603 CHI R 406 669-0155-184 180K OHMS J 063W 0603 CHI R 407 669-0155-273 27K OHMS J 063W 0603 CHIP R 408 669-0155-563 56K OHMS J 063W 0603 CHIP R 409 669-0155-104 100k OHMS J 063W 0603 CHI R 414 669-0155-471 470 OHMS J 063W 0603 CHIP R 415 669-0155-471 470 OHMS J 063W 0603 CHIP R 416 669-0155-223 22K OHMS J 063W 0603 CHIP R 417 669-0155-684 680K OHM J 063W 0603 CHIP R 418 669-0155-104 100k OHMS J 063W 0603 CHI R 450 669-0155-563 56K OHMS J 063W 0603 CHIP R 451 669-0155-273 27K OHMS J 063W 0603 CHIP R 452 669-0155-563 56K OHMS J 063W 0603 CHIP R 453 669-0155-104 100k OHMS J 063W 0603 CHI R 454 669-0155-104 100k OHMS J 063W 0603 CHI R 455 669-0155-563 56K OHMS J 063W 0603 CHIP R 456 669-0155-153 15k OHMS J 063W 0603 CHIP

28. PARTS LIST 4- 7 001-3282-101/102 023-3282-002 A 001 023-3282-350 HAND INSERT 3282 MODEM RE HW 002 675-0604-010 SCR PHILLIPS PANHD 440 HW 003 674-6002-101 HOLE PLUG 3/16IN. HW 004 675-1204-006 SCR #4 PHL FLT 82 ZPS HW 005 696-4504-008 WASHER SHLDR #4X.046 HW 305 675-1604-010 4-40MACH PAN HD ZPS PH ML 000 004-3282-003 MODEM SETUP INSTRUCTIONS MP 002 014-0778-009 ENCL SGL SMALL CRMATE MP 003 312-6373-026 4-40 HEX THREADED SPACER MP 008 017-2225-036 TELEMETRY ENCLOSURE END P MP 009 017-2225-611 REAR COV RS232 UNPNT MP 011 017-2225-899 TELEMETRY LINK MP 305 013-1160-103 4-40 HEX SPAC MALE/FEM

29. PARTS LIST 4- 8 001-3282-101/102 250-3282-002 A 001 023-3282-350 HAND INSERT 3282 MODEM RE HW 002 675-0604-010 SCR PHILLIPS PANHD 440 HW 003 674-6002-101 HOLE PLUG 3/16IN. HW 004 675-1204-006 SCR #4 PHL FLT 82 ZPS HW 005 675-1206-306 3/16IN.L. STEEL MACHINE S HW 005 696-4504-008 WASHER SHLDR #4X.046 HW 305 675-1604-010 4-40MACH PAN HD ZPS PH ML 000 004-3282-003 MODEM SETUP INSTRUCTIONS ML 000 041-0419-025 DRL WARRANTY REGISTRATION ML 000 051-0403-429 DIE CUT PKG CONTAINER ML 000 659-9003-002 MADE IN USA LABEL SM ML 001 021-3325-344 1200 BAUD REPLACEMENT MOD MP 002 014-0778-009 ENCL SGL SMALL CRMATE MP 003 312-6373-026 4-40 HEX THREADED SPACER MP 008 017-2225-036 TELEMETRY ENCLOSURE END P MP 009 017-2225-611 REAR COV RS232 UNPNT MP 010 017-2225-749 MTG PLT TELEM CRMATE MP 011 017-2225-899 TELEMETRY LINK MP 305 013-1160-103 4-40 HEX SPAC MALE/FEM

22. SECTION 4 4-1 001-3282-101/102 PARTS LIST 023-3282-352 C 100 610-3674-680 68pF 5% NPO 0603 C 101 610-3674-680 68pF 5% NPO 0603 C 102 610-3674-680 68pF 5% NPO 0603 C 103 610-3674-680 68pF 5% NPO 0603 C 104 610-3674-680 68pF 5% NPO 0603 C 105 610-3674-680 68pF 5% NPO 0603 C 106 610-3674-680 68pF 5% NPO 0603 C 110 610-3674-680 68pF 5% NPO 0603 C 111 610-3674-680 68pF 5% NPO 0603 C 112 610-3674-680 68pF 5% NPO 0603 C 113 610-3674-680 68pF 5% NPO 0603 C 114 610-3674-680 68pF 5% NPO 0603 C 115 610-3674-680 68pF 5% NPO 0603 C 116 610-3674-680 68pF 5% NPO 0603 C 117 610-3674-680 68pF 5% NPO 0603 C 118 610-3674-680 68pF 5% NPO 0603 C 119 610-3674-680 68pF 5% NPO 0603 C 120 610-3674-680 68pF 5% NPO 0603 C 121 610-3674-680 68pF 5% NPO 0603 C 200 610-3675-103 .01MF X7R K 0603 CHPR C 201 610-3675-103 .01MF X7R K 0603 CHPR C 202 610-9224-011 4.7UF, 16V,SMD A,20%, TAN C 203 610-3609-104 .1UFD X7R J 1206 RL C 204 610-3675-102 .001uF 10% X7R 0603 C 220 610-3674-220 22pF 5% NPO 0603 C 221 610-3674-220 22pF 5% NPO 0603

16. THEORY OF OPERATION 3-2 001-3282-101/102 Four integrated circuits on the modem PC board provide most of the modem functions. Microcontroller U220 provides the control functions for Modem IC U230. Modem IC U230 provides filtering and analog/digital conversion of the data. RS-232 interface IC U240 converts the -5V and +5V logic levels from the RS-232 port (J101) to the 0V and +5V TTL levels required by U230 (it also inverts these levels). Regulator IC U200 produces the +5V supply. Figure 3-2 MODEM TONE FREQUENCY BANDS 3.2 FULL-DUPLEX/HALF DUPLEX OPERATION Full-duplex means that data can be simultaneously transmitted and received. This type of operation allows data to be transmitted and received at the same time in a remote site. Full-duplex operation requires a duplex receiver and transmitter (transceiver) and two RF channels. Half-duplex means that data can be both transmitted and received, but not at the same time. This type of operation requires a simplex transceiver and only one RF channel. If the modem is connected to only a receiver or transmitter instead of a transceiver, data transmission is one-way. For example, if the modem is connected to only a transmitter, data can be transmitted from a site but not received.

27. PARTS LIST 4- 6 001-3282-101/102 R 457 662-0130-103 10K OHM SMD TRIMMER R 458 669-0155-103 10K OHMS J 063W 0603 CHIP R 459 669-0155-103 10K OHMS J 063W 0603 CHIP R 460 669-0155-471 470 OHMS J 063W 0603 CHIP RM 000 684-1606-062 SLDR 62/36/2 H20 CLEAN S 101 683-5100-108 SMT DIP SW 8 POS SPST U 200 644-2003-067 5V REG MICROPOWER SO-8 U 205 644-2003-074 MC33164D LOW V SENSOR U 220 644-5011-309 MC68HC711E9CFN2 U 230 644-3988-013 BELL 202+ MODEM 73K302LIH U 240 644-2023-034 RS232 TRANSCEIVER AUTO SH U 400 644-2020-017 QUAD OPAMP SO-14 33174 U 401 644-3016-053 3 2CH ANALOG MUX/DEMUX U 450 644-2020-017 QUAD OPAMP SO-14 33174 Y 220 621-0008-001 8.0MHZ X HC495-SMD T&R Y 230 621-0011-061 11.059 MHZ X HC495-SMD T& 023-3282-350 A 001 023-3282-352 3282 MODEM REV2 AUTO INSE CR 250 623-2503-180 18V J 1W ZENER REEL HW 102 615-7109-010 POLARIZING KEY BOX CNT J 101 615-0506-025 25P RT ANG D-SUB W/IRT J 102 615-7104-005 HDR 10POS RA SHROUDED J 103 615-0506-115 15 PIN PCB MOUNT DE15 FEM ML 000 664-4800-099 SFTW COPYRIGHT 1999(DRL) ML 001 659-1154-003 LBL SER # BLANK

30. SECTION 5 5-1 001-3282-101/102 COMPONENT LAYOUT Figure 5-1 3282 MODEM COMPONENT LAYOUT 1999 Dataradio COR Ltd. Company Confidential

21. THEORY OF OPERATION 3-7 001-3282-101/102 3.6.4 COMPLETING DATA RECEPTION When a loss of carrier tone is detected for a time tCD (Off), the CD output off the RS-232 port goes low (Off) and the RxD output is clamped to a “Mark”. Figure 3-3 MODEM INTERCONNECT DIAGRAM TRANSMITTER RF RF RECEIVER RX DATA TX DATA TX KEYING RECEIVER TRANSMITTER INTERFACE CONTROL REQUEST TO SEND (RTS) DATA TERMINAL READY (DTR) CLEAR TO SEND(CTS) CARRIER DETECT (CD) U304 PORT RS-232 UNIT TELEMETRY TX DATA RTS DTR CTS CD RX DATA U230 MODEM ASSEMBLY

6. GENERAL INFORMATION 1-2 001-3282-101/102 1.4 PRODUCT WARRANTY The warranty statement for the Integra-TR is available by contacting your sales representative or by sending your request to Dataradio COR Ltd. (see Section 1.3 for address). 1.5 REPLACEMENT PARTS This product is normally not field-serviceable, except by the replacement of complete units. Specialized equipment and training is required to repair logic boards and radio modems. 1.6 FACTORY REPAIR Dataradio products are designed for long life and failure-free operation. If a problem arises, factory service is available. Contact the Technical Service Department before returning equipment. A service representative may suggest a solution eliminating the need to return equipment. A Return Material Authorization (RMA) is required when returning equipment to Dataradio for repair. Contact the Technical Service Department at 800-992-7774, extension 6707 to request an RMA number. Be prepared to give the equipment model and serial number, your account number (if known), and billing and shipping addresses. Include the RMA number, a complete description of the problem, and the name and phone number of a contact person with the returned units. This information is important. The technician may have questions that need to be answered to identify the problem and repair the equipment. The RMA number helps locate your equipment in the repair lab if there is a need to contact Dataradio concerning the equipment. Units sent in for repair will be returned to the customer re-tuned to the current Dataradio Test and Tune Procedure and will conform to all specifications noted in this section Customers are responsible for shipping charges (to Dataradio) for returned units in warranty. Units in warranty are repaired free of charge unless there is evidence of abuse or damage beyond the terms of the warranty. Dataradio covers return shipping costs for equipment repaired while under warranty. Units out of warranty are subject to repair service charges. Customers are responsible for shipping charges (to and from Dataradio) on units out of warranty. Return shipping instructions are the responsibility of the customer.

31. 6 - 1 001-3282-101/102 4.7K R248 4.7K R227 CR220 R G 12 43 C251 68pF J400 2 J400 1 100K R418 031_060_TestPoint TP400 C222 0.01 JIC R201 22pF C230 22pF C231 0.001 C204 1 C250 47K R269 47K R268 R267 47K R266 47K Q253 2N3904 Q252 2N3904 0.1 C203 2.2M R224 2.2K R225 68pF C106 68pF C105 68pF C104 68pF C103 68pF C102 68pF C101 68pF C100 68pF C121 68pF C120 68pF C119 68pF C118 68pF C117 68pF C116 68pF C115 68pF C114 68pF C113 68pF C112 68pF C111 68pF C110 39 R270 39 R275 39 R271 39 R272 4.7 C459 4.7 C458 22pF C221 22pF C220 0.01 C201 0.01 C200 0.001 C408 0.01 C407 100pF C406 0.001 C405 680K R404 680K R403 100K R454 100K R453 68pF C404 100pF C403 0.01 C402 0.01 C401 0.01 C457 0.01 C456 0.001 C455 220pF C454 0.01 C453 0.01 C452 0.001 C451 C202 4.7 4.7 C241 4.7 C240 Q250 2N3906 1.0uH L250 U200 LP2951 2 SENSE 6 +5TAP 3 SD 7 FB 8 VCC 4 GND 5 _ERR 1 +5OUT U210 2 TD 1 _PBRST 3 TOL 8 VCC 7 _ST 5 RST 4 GND 6 _RST U205 MC33164D 4 GND 2 INPUT 1 _RESET 8 NC8 7 NC7 6 NC6 5 NC5 3 NC3 U230 73K302L 20 _CS 1 CLK 15 VCC 12 ALE 22 RXD 23 RXCLK 28 GND 24 ISET 8 AD4 7 AD3 18 TXCLK 16 TXA 26 VREF 2 XTL1 21 TXD 9 AD5 6 AD2 4 AD0 5 AD1 14 _RD 25 RESET 19 EXCLK 13 _WR 11 AD7 10 AD6 17 _INT 27 RXA 3 XTL2 MC68HC711E9CFN2 U220 12 PC3|AD3 44 PE4|AN4 46 PE5|AN5 48 PE6|AN6 50 PE7|AN7 27 PA7|PA1|OC1 43 PE0|AN0 45 PE1|AN1 52 VRH 21 PD1|TXD 22 PD2|MISO 23 PD3|MOSI 24 PD4|SCK 51 VRL 5 E 49 PE3|AN3 26 VCC 33 PA1|IC2 32 PA2|IC1 31 PA3|IC4|OC5|OC1 30 PA4|OC4|OC1 29 PA5|OC3|OC1 28 PA6|OC2|OC1 3 MODA|_LIR 2 MODB|VSTBY 19 _IRQ 18 _XIRQ 17 _RESET 34 PA0|IC3 47 PE2|AN2 7 EXTAL 8 XTAL 1 GND 25 PD5|_SS 39 PB3|A11 38 PB4|A12 37 PB5|A13 36 PB6|A14 35 PB7|A15 20 PD0|RXD 13 PC4|AD4 14 PC5|AD5 15 PC6|AD6 16 PC7|AD7 42 PB0|A8 41 PB1|A9 40 PB2|A10 4 STRA|AS 6 STRB|R|_W 9 PC0|AD0 10 PC1|AD1 11 PC2|AD2 MAX3243 U240 9 T1OUT 21 _INVALID 10 T2OUT 17 R3OUT 5 R2IN 6 R3IN 13 T2IN 1 C2+ 8 R5IN 16 R4OUT 24 C1- 2 C2- 11 T3OUT 7 R4IN 14 T1IN 4 R1IN 26 VCC 3 V- 23 FORCEON 25 GND 27 V+ 20 R2OUTB 19 R1OUT 18 R2OUT 28 C1+ 15 R5OUT 22 _FORCEOFF 12 T3IN S101 16 8 S101 15 7 S101 14 6 S101 13 5 S101 12 4 S101 11 3 S101 10 2 S101 91 Q256 2N3904 Q255 2N3904 Q254 2N3904 Q251 2N3904 11.059MHz Y230 EP250 1N4746A 18V CR250 5% F250 1.5A J102 1 J102 2 J102 3 J102 4 J102 5 J102 6 J102 7 J102 8 J102 9 J102 10 R410 JIC R412 JIC 180K R406 100K R223 R218 100K R220 100K 22 C233 C235 0.1 C234 0.1 C232 0.1 R210 100K R211 100K R212 100K R213 100K R214 100K R215 100K R216 100K R217 100K R230 100K 100K R232 R231 2.2M J101-1 1 J101-2 2 J101-3 3 J101-4 4 J101-5 5 J101-6 6 J101-7 7 J101-8 8 J101-20 20 J101-22 22 C245 0.33 C244 0.33 R240 39 C242 0.047 C243 0.33 Y220 8.000MHz U400-C MC33174D 8 10 9 J103-1 1 J103-2 2 J103-3 3 J103-4 4 J103-5 5 J103-6 6 J103-7 7 J103-8 8 J103-9 9 J103-10 10 J103-11 11 J103-12 12 J103-13 13 J103-14 14 J103-15 15 2.2K R249 MC14053B U401 15 Z 1 Y1 10 S 2 Y0 MC14053B U401 4Z 3 Y1 9 S 5 Y0 MC14053B U401 14 Z 13 Y1 11 S 12 Y0 MC14053B U401 6 _E 16 VDD 7 VEE 8 VSS CW CCW R411 JIC CW CCW 10K R457 C W C C W 100K R400 TP401 031_060_TestPoint TP450 031_060_TestPoint 031_060_TestPoint TP220 MH3 REF1 680K R417 56K R402 56K R408 R455 56K 56K R450 56K R452 47K R263 47K R255 47K R256 47K R264 47K R258 47K R259 47K R265 47K R261 47K R262 470 R460 470 R415 470 R414 U450-C MC33174D 8 10 9 27K R451 27K R407 22K R416 180K R405 15K R456 R401 15K 100K R200 100K R257 100K R254 100K R260 JIC R413 R222 100K 100K R221 2.2K R250 10K R458 R459 10K 10K R253 10K R252 10K R251 100K R409 0.1 C400 0.1 C450 CR400 5% 9.1V BZX84C MC33174D U450-E 11 GND 4 PWR MC33174D U400-E 11 GND 4 PWR MC33174D U450-B 7 5 6 U450-A MC33174D 1 3 2 U400-A MC33174D 1 3 2 U400-D MC33174D 14 12 13 U400-B MC33174D 7 5 6 MC33174D U450-D 14 12 13 MOB_TX_DATA MOB_TX_DATA WB_OUT WB_OUT WB_OUT RX_DATA RX_DATA RX_DATA SUB_AUD_DATA SUB_AUD_DATA TX_DATA TX_DATA WB_IN WB_IN WB_IN SOURCE VREF VREF VREF VREF VREF VREF SOURCE 13.6V_FUSED 13.6V_FUSED 13.6V_FUSED RX_AUDIO RX_AUDIO TX_AUDIO TX_AUDIO TXD TXD TXD CS_0 CS_0 RTS RTS CTS CTS DTR DTR DCD DCD RXDRXD RXD AD_3 AD_3 AD_4 AD_4 AD_5 AD_5 _IRQ _IRQ AD_1 AD_1 CS_2 CS_2 CS_4 CS_4 CS_3 CS_3 TX_MUTE TX_MUTE AD_0 AD_0 AD_6 AD_6 AD_2 AD_2 ARQ ARQ _SQUELCH _SQUELCH VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC SOURCE VCC PTT PTT PTT AD_7 AD_7 CS_1 CS_1 RX_TX RX_TX WB_SEL WB_SEL WB_SEL WB_SEL INTERCEPT INTERCEPT FINISH: MATERIAL: RELEASE DATE: REFERENCE: .XXX .XX MM DECIMALS APPROVED BY: CHECKED BY: LAST MODIFIED BY: DATE: DATE: DATE: TOLERANCE UNLESS OTHERWISE SPECIFIED APPROVED BY: DATE: bhaman m:\jdt_release_archive\2423282\3282-350.2\3282_350.2.tc 3/23/00 TP450 Short For Low Impedance * These Parts Are Placed For Bootstrap Mode EXTERNAL CONNECTOR WB_IN WB_OUT FREQ_SELECT RSSI 13.6V _PTT_OUT SQUELCH_IN TX_DATA GROUND RX_DATA * * * RS232_RI OPT 3 OPT 2 OPT 1 HALF/FULL DPLX SQUELCH INVERT BELL 202/103 CONV/ARQ NORM/LOOP COMPUTER CONNECTOR RX_DATA WB_OUT GROUND _ARQ_OUT TX_RX SUB_AUD_DATA 13.6V 13.6V _TX_MUTE_OUT _INTERCEPT TX_DATA WB_IN GROUND _PTT_OUT SQUELCH_IN MOBILE RADIO CONNECTOR RS232_DTR RS232_DCD RS232_GND RS232_DSR RS232_CTS RS232_RTS RS232_TXD RS232_RXD SHIELD_GND 3282 Modem Schematic Figure 8-1  1999 Dataradio COR Ltd. COMPANY CONFIDENTIAL

4. TABLE OF CONTENTS ii Part No. 001-3282-101/102 4 PARTS LIST 5 COMPONENT LAYOUT 6 SCHEMATIC LIST OF TABLES 2-1 3282 INTERCONNECT CABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-2 SWITCH S101 SETTINGS FOR BELL103/202 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-3 DIP SWITCH S101 SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-4 SWITCH S101 NORMAL CONVENTIONAL MODE OPTION SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 2-5 SWITCH S101 TEST MODE SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 3-1 MODEM TIMING PARAMETERS (BELL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 LIST OF FIGURES 2-1 DL-3400 EXTERNAL CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-2 RNet  / JSLM EXTERNAL CONNECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2-3 RS-232 CONNECTOR PINOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2-4 DIP SWITCH S101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2-5 MODEM BOARD ADUSTMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 3-1 MODEM BOARD BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-2 MODEM TONE FREQUENCY BANDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3-3 MODEM INTERCONNECT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 5-1 3282 MODEM COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 6-1 3282 MODEM SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

11. MODEM SETUP 2- 4 001-3282-101/102 The following tables (2-2 through 2-4) show the various settings for Dip Switch S101 pictured in Figure 2-4. Table 2-2 SWITCH S101 SETTINGS FOR BELL 103/202 DIP Switch S101 Operating Mode Baud Rate Full/ Half Dup Tx Freq Rx Freq 1 2 3 4 5 Space Mark Space Mark (0=Off, 1=On) Normal Modes 0 - 1 - 1 Bell 103 Answer 300 Full 2025 2225 1070 1270 0 - 1 - 0 Bell 103 Originate 300 Full 1070 1270 2025 2225 0 - 0 - 1 Bell 202 Full-Duplex 1200 Full 2200 1200 2200 1200 0 - 0 - 0 Bell 202 Half-Duplex 1200 Half 2200 1200 2200 1200 1 2 3 4 5 Loopback Modes 1 - 1 - 1 Bell 103 Answer Loopback 300 Full 2025 2225 2025 2225 1 - 1 - 0 Bell 103 Originate Loopback 300 Full 1070 1270 1070 1270 1 - 0 - 1 Bell 202 Main Loopback 1200 Full 2200 1200 2200 1200 1 - 0 - 0 Bell 202 Main Loopback 1200 Full 2200 1200 2200 1200 Table 2-3 DIP SWITCH S101 SETTINGS DIP Switch S101 (0=Off, 1=On) 1 2 3 4 5 Function 0* - - - - Normal Mode 1 - - - - Loopback Mode (Test Mode) - 0* - - - Conventional Mode - - 0* - - Bell 202 Mode (Half-duplex) - - 1 - - Bell 103 Mode - - - 0* - Active High Squelch Detect - - - 1 - Active Low (Inverted) Squelch Detect - - - - 0* Bell 103 Originate Mode/Bell 202 Half-Duplex Mode - - - - 1 Bell 103 Answer Mode/Bell 202 Full-Duplex Mode * Factory Settings.

19. THEORY OF OPERATION 3-5 001-3282-101/102 3.5.4 DELAY PERIOD When the RTS input of the RS-232 port goes high, a delay period tRC (On) is initiated (refer to Table 3-1). During this delay period, a carrier is transmitted to alert the other modem that data is coming. After this delay period expires, the Clear-To-Send (CTS) output of the RS-232 port goes high to indicate to the data equipment that it may start sending data. Data is fed into the modem on the Transmit Data (TxD) pin of the port. 3.5.5 DATA FORMAT NOTE: The data from the data equipment is inverted by U240. However, it is inverted again at the receiving end, so the logic level at the RS-232 port is the same on both ends. The data from the data equipment is converted to audio tones by U230 using FSK (Frequency-Shift- Keying) modulation. A “Mark” tone is produced by a logic 0 (low) input to the RS-232 port, and a “Space” tone is produced by a logic 1 (high) input. The frequency of these tones is shown in Table 2-1. When the TxD input changes states, the tone frequency changes without any interruption in the signal (modulation is phase continuous). The audio tones are synthesized by U230 using digital techniques. Transmit filtering in U230 attenuates sideband energy present in the square-wave digital signal generated by U230. This transforms into a sine wave. Transmit filtering also prevents interference with the back channel (not used) or the other duplex channel. 3.5.6 COMPLETING DATA TRANSMISSION When the data equipment is through sending data, it brings the RTS input of the RS-232 port back low (Off). The TxD input is then disabled and a timing period tRC (Off) begins (refer to Table 3-1). With Bell 202 modes, soft turn-off and squelch occur during this timing period. Other modes do not utilize either function. At the end of this period, the CTS output of the RS-232 port goes back low (Off). The following is a brief description of soft turn-off and squelch: Soft Turn-Off When the RTS input of the RS-232 port goes low at the end of a message, transients may be generated which could cause erroneous data to be received at the other modem. During soft turn-off, a 900 Hz Soft Carrier Turn-off Tone is transmitted for a period tSTO after RTS goes low. This provides a steady “Turn Off” tone followed by a silence at the other modem so that transients are not interpreted as data. The 900 Hz Soft Carrier Turn-off is not available in Bell 103 mode. Squelch The squelch period tSQ is initiated when the RTS input of the RS-232 port goes low and if in Bell 202 mode the 900 Hz Soft Carrier Turn-off Tone is transmitted for tSTO (25 ms). During this period, the CD output is clamped low (Off) which forces the RD output low. This disables the data receiver between the time RTS goes low and the start of carrier detect so that transients are not demodulated.

2. DL-3282 1200 Baud Modem Revision 001 001-3282-101/102 May 1999 Supersedes 001-3282-003 March 1999 Copyright” 1999 by Dataradio COR Ltd. Dataradio COR Ltd. designs and manufactures radios and radio modems to serve a wide variety of data communication needs. Dataradio produces equipment for the fixed data market including SCADA systems for utilities, petrochemical, waste and fresh water management markets and RF boards for OEM applications in the Radio Frequency Data Capture market. PRODUCT WARRANTY The manufacturer's warranty statement for this product is available from Dataradio COR, Ltd. 299 Johnson Avenue, Box 1733, Waseca, MN 56093-0833. Phone (507) 833-8819. The information in this document is subject to change without notice. is a trademark of D A T A R A D I O , Inc.

15. SECTION 3 3-1 001-3282-101/102 THEORY OF OPERATION Figure 3-1 MODEM BOARD BLOCK DIAGRAM 3.1 INTRODUCTION The function of the modem is to convert digital data into tones that can be transmitted using an RF link. It also converts these tones back into digital data when the signal is received. A block diagram showing the modem, the telemetry unit generating or receiving the data, and the RF receiver and transmitter is shown in Figure 3-1. This modem can be used for full-duplex, half-duplex, or one-way data communications (refer to Section 3.2). The RF receiver/transmitter configuration determines which type of communication is possible. This modem has an RS-232C compatible port for interfacing with the unit receiving or transmitting the data. A DIP switch on the modem PC board programs the modem to operate according to one of the Bell standards listed in Table 2-2. U240 J101 1 SHIELD 2 RS-232 RxD RS-232 TxD 3 RS-232 RTS 4 RS-232 CTS 5 6 RS-232 DSR 7 RS-232 GND 8 RS-232 DCD 20 RS-232 DTR 22 RS-232 RI U230 U220 U200 TX AUDIO RX AUDIO 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 J102 EXTERNAL CONNECTOR CONNECTOR MOBILE RADIO WB OUT WB IN FREQ SELECT RSSI +13.6V PTT OUT SQUELCH IN TX DATA 9 GROUND 10 RX DATA J103 SQUELCH IN PTT OUT GROUND WB OUT TX DATA INTERCEPT TX MUTE OUT +13.6V 9 +13.6V 10 SUB AUDIO DATA 11 TX/RX 12 ARQ OUT 13 GROUND 14 WB IN 15 RX DATA +13.6V +13.6V WB SEL TX DATA WB SEL +5V +13.6V Q250/Q251 Q252 Q253 Q254 Q255 Q256 SCI BUS CS BUS ADDRESS BUS U450D U401A U400B/C/D U401C U450A U450A U401B U450B/C IRQ +5V REGULATOR RESET +5V NORM/LOOP H/F DUPLEX BELL 202/103 CONV SQUELCH INV OPT 1 OPT 3 OPT 2 S101

14. MODEM SETUP 2- 7 001-3282-101/102 c. Monitor the AC voltage at TP400, J102. Adjust R400 for 400 mVrms if using a DRL telemetry transceiver. If another transceiver is used, adjust R400 as required. J103 pin 5 has a resistor that will drop the Tx output level to 40 mVrms when connected to the DRL JSLM  / RNet. d. Re-install the modem board in the housing. Figure 2-5 MODEM BOARD ADJUSTMENT AND TEST POINTS Transmit Level Adjust A Tuning tool should be used to perform adjustments on R400. This tool is available from DRL’s Customer Service (see Section 1.3) as part number 721-0015-142S.

17. THEORY OF OPERATION 3-3 001-3282-101/102 3.3 DATA TONE BANDWIDTH 3.3.1 INTRODUCTION The baud rate and modulating frequencies utilized by each of the programmable operating formats are shown in Table 2-2. As indicated, 300 baud full- or half-duplex data rates are available with the Bell 103 mode and 1200 baud full- or half-duplex data rates are available with the Bell 202 mode. However these standards are intended primarily for use with a two-wire phone line which provides simultaneous two-way communication. Operation with an RF link is different because a single RF channel can provide communication in only one direction at a time. 3.3.2 PHONE LINE AND RF LINK BANDWIDTH The two tones used by this modem to transmit and receive data are in the audio range of approximately 300-3000 Hz. With a 2-wire phone line, full-duplex data transmission is achieved by frequency multiplexing two 300-baud channels into the 3000 Hz bandwidth of the phone line (refer to Figure 3-2). Each of these 300 baud channels use two different frequencies. With half-duplex operation or pseudo full-duplex operation utilizing a back channel (refer to next section), only one main data channel is transmitted at a time. The occupied bandwidth can be greater and data can be transmitted at higher baud rates. With an RF link, each RF channel also has a bandwidth of 3000 Hz. In half-duplex applications which use a single RF channel, 300/1200 baud rates are available. For full-duplex operation, two RF channels are required (similar to a 4-wire phone line). Since two 3000 Hz bandwidth channels are then available, full-duplex 1200 baud data transmission is possible (versus 300 baud with a 2-wire phone line). 3.4 GENERAL AND LOOPBACK MODES 3.4.1 GENERAL MODES When a General operating mode is selected, the receive and transmit filters in modem IC U230 are configured for different frequencies. If the selected mode is a full-duplex mode, the transmit filter is set for the transmit frequency and the receive filter is set for the receive frequency shown in Table 2-2. If the selected mode is a half-duplex mode, the configuration of the receive and transmit filters is controlled by the RTS input of the RS- 232 port. If RTS is high (indicating data is to be transmitted), the transmit filter is set to the transmit frequency and the receive filter is set to the back channel (refer to Section 3.5.3). If the RTS input is low, the receive filter is set to the receive frequency and the transmit channel is set to the back channel.

5. SECTION 1 1-1 001-3282-101/102 GENERAL INFORMATION 1.1 INTRODUCTION This manual contains setup and service information for the RS-232 Dataradio COR Ltd. Modem. This modem can be purchased separately or as part of a telemetry module as described in the next section. Since the telemetry module service manuals do not include modem servicing information, this service manual is used in all applications. 1.2 MODEM DESCRIPTION This modem can be purchased separately using Part No. 250-3282-002, or as part of a DRL DL-3400 or DRL JSLM/RNet  Telemetry Module using Part No. 023-3282-002. The function of a modem is to convert digital data into an analog signal that can be used to modulate an RF carrier. It also converts these analog signals back into digital data. This allows digital data to be transmitted and received using an RF link. This modem is compatible with Bell 103/202 standards for modems. It has an RS-232 compatible port for interfacing with data equipment. An RF transmitter, receiver, or transceiver is required with this modem unless it is used with some other type of link such as a phone line. Refer to Section 3 for a complete description of modem operation. 1.3 FACTORY TECHNICAL SERVICE The Technical Service Department provides customer assistance on technical problems and serves as an interface with factory repair facilities. They can be reached in the following ways: Dataradio COR Ltd. 299 Johnson Avenue, P.O. Box 1733 Waseca, MN 56093-0833 Technical Service hours are: Monday to Friday 7:30 AM to 4:30 PM, Central Time Phone: 1-800-992-7774 or 1-507-833-8819 Fax:1-507-833-6748 Email address: support@dataradio-cor.com

18. THEORY OF OPERATION 3-4 001-3282-101/102 3.4.2 LOOPBACK MODES When a Loopback mode is selected, both the filters in U230 are configured for the same frequency. Half- duplex operation in the Loopback modes is the same as it would be in the General modes because the back channel is not used. If a full-duplex originate mode is selected, the filters are set to the transmit frequency; if a full-duplex answer mode is selected, they are set to the receive frequency. 3.5 TRANSMITTING DATA NOTE: The levels in the following information are the levels at the RS-232 port. The levels on the pins of U230 are the inverse of these levels because of the inversion produced by U240. 3.5.1 INTRODUCTION The transmit data signal originates from the data equipment. This data signal is applied to the TD (Transmit Data) input of the RS-232 port, inverted and converted to TTL by U240, and then applied to the TxD input of U230 and converted to the MARK and SPACE tones. These tones are fed out of U230 on the TxA (Transmit Audio) pin. They are then routed to a separate RF transmitter module where they frequency modulate the RF signal. 3.5.2 DTR SIGNAL This signal indicates to the modem that the data equipment connected to the RS-232 port is ready to transmit or receive data. 3.5.3 RTS SIGNAL When the equipment connected to the RS-232 port is ready to send data, it brings the RTS (Request-To- Send) input high. This signal must remain high for the duration of the data transmission. If the DTR input is low, bringing the RTS input high has no effect. It is common protocol that a SPACE (logic 0 or low) be presented to the Transmit Data (TxD) input just before the RTS input is made high. When the data transmission is finished, the RTS input is brought back low which disables the transmitter section of U230. In the half-duplex General modes, the RTS input also controls the transmit and receive filters in U230 as described in Section 3.4.1.

13. MODEM SETUP 2- 6 001-3282-101/102 Figure 2-4 DIP SWITCH S101 2.3.2 DIP SWITCH S101 DIP switch S101 has been factory set for the “Normal / Conventional / Bell 202 Half-Duplex / Active High Squelch / 103 Originate Mode / FSK / CTS= 240 ms” mode. The factory default setting for the RTS to CTS time is set to the maximum delay for compatibility with a wide range of products. When used with DRL synthesized radios (DL-3400 and JSLM  /RNet) a shorter delay time (30 ms) may be used. Refer to the tables above and Figure 2-4 to change the delay times. a. To access S101 and make other adjustments, remove the modem board from the housing by removing the 2 screws on the RS-232 connector, the corner screws from the opposite end of the housing, and the top cover screw. Slide the modem board out. b. Set the switches as indicated in the Tables above (0=Off, 1=On). c. Re-install the modem board in the housing unless performing adjustments described in the following two sections. 2.3.3 TRANSMIT OUTPUT LEVEL ADJUSTMENT The transmit carrier level to the transceiver is factory preset for 400 mVrms. This is the input level required by a DRL transceiver connected to the modem. If this level must be reset, proceed as follows: a. If required, remove the modem board from the housing as described in Step a of Section 2.3.2. b. Configure the telemetry equipment connected to the RS-232 jack to transmit a continuous data signal. Alternatively, if no equipment is connected to this jack, configure S101 with switches 1 and 7 ON. Then move switch 6 to ON to key-up the modem. The modem will transmit a continuous alternating space/mark tone from U230. S101 7 8 1 2 3 4 5 6 ON ON N O R M A L / L O O P C O N V E N T I O N A L B E L L 2 0 2 / 1 0 3 S Q U E L C H I N V E R T H A L F / F U L L D U P L E X O P T 1 O P T 2 O P T 3 0 1

20. THEORY OF OPERATION 3-6 001-3282-101/102 3.6 RECEIVING DATA NOTE: The levels in the following information are the levels at the RS-232 port. The levels on the pins of U230 are the inverse of these levels because of the inversion produced by U240. 3.6.1 INTRODUCTION The receive data signal is FSK-modulated tones from an RF receiver module. This signal is applied to the RxA (Receive Audio) input of modem IC U230. This device filters the tones to attenuate out-of-band frequencies and then convert the tones to digital data. The data is then filtered again and fed out of U230 on the RxD pin. U240 inverts the data and converts it to RS-232 levels. It is then applied to the RxD pin of the RS-232 port. 3.6.2 DTR SIGNAL The DTR signal indicates that the data equipment connected to the port is ready to receive or transmit data. 3.6.3 CARRIER DETECT (CD) SIGNAL When a tone is detected on the RxA input of U230 for a time tCD (On), the CD output of the RS-232 port goes high. This tells the data equipment that data is coming. FSK-modulated tones on the RxA input are then converted to digital data and fed out on the RxD output of the port. Table 3-1 MODEM TIMING PARAMETERS (BELL) Symbol Description Bell 103 Orig Bell 103 Answer Bell 202 Units tRC (On) RTS to CTS on delay 30/60/180/240 30/60/180/240 30/60/180/240 ms tRC (Off) RTS to CTS off delay 0.5 0.5 0.5 ms tCD (On) Carrier Det on delay 8-20 8-20 6-12 ms tCD (Off) Carrier Det off Delay 6-20 6-20 3-8 ms tSQ Receiver squelch duration 60 60 33 ms tSTO Transmitter soft turn-off duration - - 25 ms

10. MODEM SETUP 2- 3 001-3282-101/102 2.1.3 3282 LEDS The 3282 has 2 LEDs (CR220) that are visible through the adjustment hole in the case closest to the 10 pin connector. One LED will flash green whenever the modem has power and the microcontroller U220 is operating correctly. The other red LED will be solid red whenever the modem is transmitting. 2.2 FACTORY DEFAULT SETTINGS 2.2.1 INTRODUCTION Normal Conventional Bell 202 Half Duplex Active High Squelch FSK Audio 240 ms RTS to CTS Delay 100 mS Soft Carrier Turnoff debounce time Transmit Input Level (pre-set for 400 mVrms) The factory default setting for the RTS to CTS time is set to the maximum delay for compatibility with a wide range of products. When used with DRL synthesized radios (DL-3400 and JSLM  /RNet) a shorter delay time (30 ms) may be used. These settings may require adjustment in the field to optimize performance in your application. 2.2.2 RECEIVE INPUT LEVEL For proper operation of the modem, the carrier level from the transceiver should be 35 mVrms -1 mVrms (or 99 mVp-p - 2.8 mVp-p). DRL transceivers are factory adjusted to provide a data level output to the modem of 707 mVrms (or 2 V p-p) for use with the DRL DL-3400. The data level output to the modem when used with the DRL JSLM  /RNet is 212 mVrms + 17.5 mVrms (or 0.6 V p-p + 0.05 V p-p). 2.3 ADJUSTMENTS 2.3.1 INTRODUCTION There are two adjustments on the modem board. These adjustments have been set at the factory and may require further adjustment in the field for your application. DIP Switch S101 Transmit Level R400

7. GENERAL INFORMATION 1-3 001-3282-101/102 DL-3282 1200 BAUD MODEM SPECIFICATIONS The following are general specifications intended for use in testing and servicing this modem. These specifications are subject to change without notice. FCC ID Part 15 Dimensions (LxWxH) 4.75” x 2.90” x 1.237” (12.07cm x 7.37cm x 3.14cm) Operating Voltage 7 to 16 VDC Current Drain Less than 50mA Temperature Range -30 ° C to +60 ° C Data Interface EIA RS-232C Standard: DB-25 subminiature connector, female DRL TM Brand Radio Interface 10-pin 3M type 3325 connector RTS/CTS 30/60/180/240 msec Data Rates FSK: 1200, 300 BPS Data Format Transparent to asynchronous data Bit Error Performance Less than 1 x 10 -6 at 18 dB SINAD with 3.3 kHz deviation and 25 kHz RF channel bandwidth Transmit Keyline Driver logic low open-collection NPN transistor with emitter grounded I C (max.) = 100 mA; V CE-ON (max.) = 0.3 V

9. MODEM SETUP 2- 2 001-3282-101/102 Figure 2-2 RNet  /JSLM EXTERNAL CONNECTORS 2.1.2 USER INTERFACE The 3282 interfaces with user equipment through the DB-25 RS232 connector. See Figure 2-3 for pinout details . RS-232 PINOUT & DESCRIPTION 1 Shield_GND J101-1 2 RS232_ DCE RXD J101-2 3 RS232_ DCE TXD J101-3 4 RS232_RTS J101-4 5 RS232_CTS J101-5 6 RS232_DSR J101-6 7 RS232_GND J101-7 8 RS232_DCD J101-8 20 RS232_DTR J101-20 Interconnect Cable (697-3282-012) Length: 18 in (connector end to connector end) 3 ft (power supply terminals to JSLM connector end) RNet  /JSLM Tx_Rx Sub_Aud_Data 7 8 9 10 11 12 6 5 4 3 2 13 1 14 15 16 17 18 19 20 21 22 23 24 25 Figure 2-3 RS-232 CONNECTOR PINOUT

8. SECTION 2 2- 1 001-3282-101/102 MODEM SETUP 2.1 INTERCONNECT CABLE INSTALLATION 2.1.1 INTRODUCTION The modem requires a power source with an operating voltage range of 7 - 16 Vdc. NOTE: Transceiver may require a more restricted operating range. Interconnect cables are available from DRL. Contact your sales representative for details. Table 2-1 3282 INTERCONNECT CABLES The external connector on the modem is a 3M-type male 10-pin ribbon connector. As shown in Figures 2- 1 and 2-2, only one power connection is required. Also shown in Figures 2-1 and 2-2 are the pin designations for these connectors. Install these cables as required for your particular installation. Figure 2-1 DL-3400 EXTERNAL CONNECTOR TRANSCEIVER MODEL DRL CABLE # CONNECTOR TYPES DL-3400 023-3410-125 10-Pin (2) * (to spade terminals) RNet  / JSLM 697-3282-012 DE-15 (1) & DA-15 (1) * MODEM 10-PIN CONNECTOR ASSIGNMENTS PIN FUNCTION TYPICAL COLOR 1 2 3 4 5 6 7 8 9 10 BROWN BLUE VIOLET GREEN RED ORANGE GRAY YELLOW BLACK WHITE Wideband Out Wideband In NOT USED NOT USED SUPPLY VOLTAGE (+) TX KEY (PTT) OUT CARRIER DETECT IN TX NARROW BAND DATA OUT GROUND (-) RX NARROW BAND DATA IN M O D E M T R A N S C E I V E R 1 2 9 10 10-Pin Connector Pinout Note: Using Pins 1 & 2 to transmit data is not FCC approved. PART NO. 023-3410-125 (length: 3 ft.)

12. MODEM SETUP 2- 5 001-3282-101/102 Table 2-4 SWITCH S101 NORMAL/CONVENTIONAL MODE OPTION SETTINGS DIP Switch S101 (0=Off, 1=On) 1 2 6 7 8 Function 0* 0 0* - - FSK Mode (Audio from and to the Modem IC is not routed through the filters on board). This Mode is to be routed into an FSK/Audio Port of the Radio. 0 0 1 - - WB Mode (Audio from and to the Modem IC is routed through the audio filters on board). This Mode is to be routed into a Wide Band Port of the Radio. 0 0 - 0 0 Time between activating PTT to activating Clear-To-Send (CTS) = 30 ms . Time to debounce Soft Carrier Turnoff (SCT) at end of transmission = 25 ms . 0 0 - 1 0 Time between activating PTT to activating Clear-To-Send (CTS) = 60 ms . Time to debounce Soft Carrier Turnoff (SCT) at end of transmission = 50 ms . 0 0 - 0 1 Time between activating PTT to activating Clear-To-Send (CTS) = 180 ms . Time to debounce Soft Carrier Turnoff (SCT) at end of transmission = 75 ms . 0 0 - 1* 1* Time between activating PTT to activating Clear-To-Send (CTS) = 240 ms . Time to debounce Soft Carrier Turnoff (SCT) at end of transmission = 100 ms. * Factory Setting Table 2-5 SWITCH S101 TEST MODE SETTINGS DIP Switch S101 (0=Off, 1=On) 1 2 6 7 8 Function 1 - 0 - - A Simulated Un-Asserted RTS Line from the RS-232C Connector (Un-Keys the transceiver). 1 - 1 - - A Simulated Asserted RTS Line from the RS-232C Connector (Keys up the transceiver). 1 - - 0 0 Transmit Data from the RS-232 Port. 1 - - 0 1 Transmit Mark Tone. 1 - - 1 0 Transmit Alternating Mark/Space Tones. 1 - - 1 1 Transmit Space Tone.

3. i Part No. 001-3282-101/102 TABLE OF CONTENTS 1 GENERAL INFORMATION 1.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2 MODEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.3 FACTORY TECHNICAL SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.4 PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.5 REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.6 FACTORY REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 2 DL-3282 1200 BAUD MODEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2 MODEM ADJUSTMENTS AND SETUP 2.1 INTERCONNECT CABLE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 USER INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 3282 LEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2 FACTORY DEFAULT SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 RECEIVE INPUT LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.3 ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 DIP SWITCH S101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 TRANSMIT OUTPUT LEVEL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 3 THEORY OF OPERATION 3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 FULL-DUPLEX/HALF DUPLEX OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.3 DATA TONE BANDWIDTH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 PHONE LINE AND RF LINK BANDWIDTH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3.4 GENERAL AND LOOPBACK MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 GENERAL MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 LOOPBACK MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.5 TRANSMITTING DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 DTR SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 RTS SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 DELAY PERIOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 DATA FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 COMPLETING DATA TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 3.6 RECEIVING DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 DTR SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 CARRIER DETECT (CD) SIGNAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 COMPLETING DATA RECEPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7