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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: [email protected]

Содержание DL-3282

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

Страница 2: ...ent 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...

Страница 3: ...ODUCTION 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 DUPLE...

Страница 4: ...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...

Страница 5: ...se 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 compa...

Страница 6: ...rial 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 retu...

Страница 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 DRLTM Brand Radio Interface 10 pin 3M type 3325 connector...

Страница 8: ...gures 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 CONN...

Страница 9: ...eld_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 69...

Страница 10: ...ility 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 pe...

Страница 11: ...ll 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...

Страница 12: ...g 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 de...

Страница 13: ...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 tr...

Страница 14: ...ired 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...

Страница 15: ...t 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...

Страница 16: ...S 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...

Страница 17: ...ly 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...

Страница 18: ...y 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 transmitt...

Страница 19: ...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 i...

Страница 20: ...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...

Страница 21: ...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...

Страница 22: ...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 118 610 367...

Страница 23: ...28 338 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 1...

Страница 24: ...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...

Страница 25: ...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...

Страница 26: ...155 184 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...

Страница 27: ...ELL 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...

Страница 28: ...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 003 312 637...

Страница 29: ...AN 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 33...

Страница 30: ...SECTION 5 5 1 001 3282 101 102 COMPONENT LAYOUT Figure 5 1 3282 MODEM COMPONENT LAYOUT 1999 Dataradio COR Ltd Company Confidential...

Страница 31: ...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...

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