2070-9D 2070-9A 2070-9B 2070-9E USER`S MANUAL
Contents
1. Pin Signal 7 RTS 4 DTR 8 CTS 6 DSR 3 TXD 1 DCD 9 RI 2 RXD FSK Receive Data RXD Data Carrier Detect DCD Transmit Data TXD FSK on board Indicators Request to Send RTS Clear to Send CTS FSK Enable Disable switch FSK Full Duplex Half Duplex switch FSK EIA 232C Connector C20 PRELIMINARY 2070 9 User s Manual Page 6 96 pin edge connector Pin A B _____ 2 srme 3 4 srmo 4 5 smR 6 serars J feras 7 86 9 909 RE SP2 TXD EE 13 aa 15 90 16 sez 9 18 ELE 21 Deena 26 29 5VSerai PRELIMINARY 2070 9x User s Manual Page 7 INSTALLATION Installation of the 2070 9 is relatively simple It can be installed with the power on provided that the power switch on the front panel is in the position The 2070 9xx receives power from the Model 2070 Controller and the Controller The incoming phone line is to be connected to the RJ 11 LINE connector An external phone can be connected to the RJ 11 labeled Note As the RJ11 connectors connected in parallel remember not to use the phone while the modem is in o2. GDI Communications LLC Transportation Communications Specialists 2070 9D 2070 9A 2070 9B 2070 9E USER S MANUAL June 11 2009 PRELIMINARY Proprietary Data This document contains confidential proprietary data with all rights and titles reserved by GDI Communications LLC By accepting this document the recipient assumes custody herof and agrees not to dislcose this data or any portion of this data to any unauthorized person without the prior written consent of GDI Communications LLC Recipient further agrees not to incorporate these drawings specifications or technical information in whole or in part in any other product or endeavor THIS LEGEND SHALL BE INCLUDED ON ANY REPRODUCTION OF THIS DOCUMENT GDI COMMUNICATIONS LLC 280 I 80 West Exit 1 PO BOX 1330 Verdi Nevada 89439 Phone 775 345 8000 FAX 775 345 8010 www sgdi com PRELIMINARY TABLE of CONTENTS 55 desde en esse 1 GERNERAE 2 GENERAL CHARACTERISTICS e esee een too era e e ean ae pea 3 INDICATORS CONNECTORS AND seen 5 Dialup tete en eva TU I LU RH De DER 5 RIAD Termination Table 5 DBO Termination Table esee eie eerte e ete 5 Termination Idblez2 ae dde 5 96 pi
3. average technician with limited experience It also requires special soldering tools to work with the surface mount parts On the other hand this modem is constructed with top quality parts and so you will not experience many failures The chart on the next page will help find the problem if you decide to fix the model 400 yourself Trouble shooting Sequence chart PROBLEM CAUSE The board is non functioning Power coming into the board or could have a problem Check connectors Modem is not generating Mark and No RTS or TXD coming from Host Space Freq Check edge connector Q8 Q7 and U8 Transmitter turns Off after 6 Anti streaming is turned on and seconds transmissions of more that 6 seconds are being used No Receive Data Check edge connector U1 U2 and RXD and CD LEDS off U3 No Receive Data Check output of input filter U1 pin8 no LEDs you should have a strong signal at this point No Receive Data Check Demodulator section UU6 8 CD LED on U6 14 and U5 14 should be close to 12v PRELIMINARY 2070 9 User s Manual 17 Waveforms Signal Characteristic Waveform Mark Frequency 5 1200 2 Space Frequency 2200Hz Soft Carrier Frequency Alternating Bit Pattern OSC out 900Hz 1720Hz PRELIMINARY 400 5 0 00 i 1150 00 i 4005 7 0 009 7 049 80 2070 9 User s Manual
4. for short timing 7 Carrier Detect timing ON for short timing 8 Anti Streaming ON enabled For normal 4 wire Full Duplex operation switch 1 should be ON and everything else should be OFF This will select standard timing and full duplex operation If Anti Streaming is required turn switch 8 ON For Normal 2 wire Half Duplex operation switches 2 and 5 should be ON and everything else is OFF Turn switch 8 ON if Anti Streaming is required Only the Audio Out transformer is used for 2 wire operation Switch 2 connects the input amplifier of the receiver to the board side of the Output transformer so that signals coming into the transformer are available to the receiver Switch 5 enables the Receiver Squelch which turns RXD OFF when the Modem is transmitting In the 4 wire full duplex mode of operation there is no connection between the Transmitter circuit and the Receiver circuit In the 2 wire mode the transmitter output is connected to the Receiver input For further adaptation all of the timing signals can be configured to be half their normal time Switch position 3 reduces the CTS delay to 6ms Position 4 reduces the Soft Carrier time to 5ms Position 6 reduces the Receiver Squelch time to 3 2ms This is the time in a 2 wire half duplex system that the Receiver is held OFF after a transmission Switch position 7 reduces the Carrier Detect time to 4ms These faster timing can be used i
5. output with one other modem or use a 600 resistor which is more accurate The potentiometer VR2 AMP will provide an adjustment range of 8 to 10 dBm Increasing the output level may increase the cross talk in some systems Another way to get more distance or more units on a run is to raise the impedance of the modems in the middle of a line The two end units are left at 600 Ohms input impedance but the units between them are changed to 4 75K This is done by moving the jumper on JP1 to the 4 75K position from the 600 position This will reduce the loading effects caused by the input impedance of the modem SYSTEMS WITH NO RTS SIGNAL Some computers or camera systems may not have the standard PRELIMINARY 2070 9x User s Manual Page 10 handshaking signals RTS and CTS The 496 needs to have the RTS signal before it will transmit In a 4 wire system where the modem can transmit continuously at a master or a point to point system the JP2 jumper can be installed which will force a RTS signal into the modem This will cause the modem to transmit continuously This will not cause a problem at a Master Modem or in a point to point system This will not work for modems that are connected to local controllers that share a line going back to a Master The RTS pin on the edge connector is pulled up with a 1 0K resistor to 12V so make that nothing is connected to the RTS pin L If you are in a situation where you don
6. t have control of RTS but you have more than one modem on the line you will have to use a Key On Data device to control the Modem GDI can supply these devices Please contact the factory for more information A common problem in 4 wire systems is not connecting them correctly The pair of wires from the Audio Out from the Master Modem is connected to the Audio In of all of the remote Modems of the Audio Out signals from all of the Remote Modems are connected together and connected to the Audio In of the Master The Audio signals are transformer coupled and are not polarity sensitive PRELIMINARY 2070 9 User s Manual Page 11 ADJUSTMENTS The only adjustment that should be made to the FSK Expansion modem is the output level VR2 potentiometer labeled AMP is used to make that adjustment The Audio output must be loaded with 600 Ohms and the output level measured across the 600 Ohm resistor You have an adjustment range from 8 to 0 dBm The two other potentiometers on the board should not need adjustment for the life of the modem and require special equipment to set correctly Contact the factory if you feel these need adjustment PRELIMINARY 2070 9x User s Manual Page 12 THEORY OF OPERATION Dialup Modem The 2070 9xx provides a Hayes compatible dialup smart modem interface to the 2070 controller Power to the board can be switched on and off from a front panel SPST switch This switch whe
7. 200bps serial 19200Hz 38400Hz Mark Space Frequencies and 13800 Soft Carrier Frequency PRELIMINARY 2070 9x User s Manual Page 3 GENERAL CHARACTERISTICS FORM FACTOR Standard 2070 plug in board size 8 375 x 5 69 x 1 592 Temp 37 to 74 degrees C Humidity 5 to 95 non condensing Power 5 V 500ma 12V 100 ma 12V 100ma DIALUP Modulation Quadrature Amp Mod Modem ITU V 34 and Rockwell V FC Interface ITU V 24 V 28 EIA 232 Data Throughput 115 2 Kbps Data Rates 33 6Kbps 31 3Kbps 28 8Kbps 26 4Kbps 24 0Kbps 21 6Kbps 19 2Kbps 16 8Kbps 14 4Kbps 12 0Kbps 9 6Kbps 7 2Kbps 4 8Kbps 2 405 1 2K baud 300 baud The modem will automatically select the best operating speed Speeds are 10 0490 Specifications V 34 V 32 bis V 32 V 22 bis 22 V 23 V 21 Bell 212 Bell 103 V 33 V 17 V 29 V 27 V 21 Channel 2 Error Correction V 42 LAPM MNP2 4 MNP 10 Data Compression V 42 bis MNP 5 Loop Tests ITU V 54 loop2 RDL and Loop 3 LAL Data Carrier 1800 0 5 Hz Calling Tone 1300 10 Hz Answering Tone 2100 15 Hz Receiver Freq Tolerance 14 Hz S N Ratio 26 dB Dynamic 12 dBm to 42 dBm Transmit Level Fixed at 11 2 dB Ring detect Sensitivity 38 VRMS Ring Equiv Number 1 Bel Termination 600 Ohm Return Loss Better than 14 dB betwee
8. Symmetry 50 mE 5 00 2008 A Chi 0 0 7 049 30 TA 12 3ms 200mv 1 ie 12 215 12 2 4 CTS Delay 12ms 9 T NE Chi 10 0 V SEE 10 0 V M2 00ms A chi 0 00 V 8 10 00 9 00ms 21 6 ie S 96ms 7 20V H DCD 8ms Audio In 20 0V M2 00ms A Chi f 0 0 2 040 20 1 ch 10 0 2 007 iA 8 9615 2 767 je 2 8808 1 72V Soft Carrier Enable Soft Carrier time 10ms vean iesus 0 A dio Out i 0240 20 PRELIMINARY 2070 9 User s Manual 19 Receiver Squelch Time 6 5ms societies iret sitom itid Squelch erre Ch2 20 0 V M2 00ms v 0 00 V 1 140 20 Voltage Measurements For DC Isolated Models TP Measurement tolerance TP13 5vdc 2 11 5vdc 2vdc TP10 5vdc 2vdc For non Isolated Models TP Measurement tolerance TP13 12vdc 6vdc TP11 12vdc 6 TP10 6 2 PRELIMINARY 2070 9 User s Manual 20 GDI COMMUNICATIONS L L C TRAFFIC EQUIPMENT MANUFACTURER SPECIALIZING IN COMMUNICATIONS 280 1 80 WEST EXIT 1 P O BOX 1330 VERDI NEVADA 89439 TELEPHONE 775 345 8000 FAX 775 345 8010 PRELIMINARY
9. ce that initiates communication over 5232 lines CTS Clear To Send A EIA RS 232D control signal that can be used to gate TXD data from a DTE Full duplex A communication system where data can be transmitted in both directions at the same time Half duplex A communication system where data can be transmitted in only one direction at a time FSK Frequency Shift Keying Communication protocol where data is encoded into binary format and represented by different frequencies Host Any DTE device MARK Signal state of a FSK system that represents a logical 1 value Private wire Telco communication hardware that is leased for private use SPACE Signal state of a FSK system that represents a logical 0 value 0 dBm Represents the signal level required to produce 1mw in a 6000 load Soft carrier Surface mount parts Electronic parts that are designed to be soldered to pads instead of vias RXD Receive Data An EIA RS 232D data signal that transfers information in form of binary data to a DTE RTS Request To send An EIA RS 232D control signal that can be used to gate TXD to a DTE The DTE asserts RTS and then waits for the DCE to respond with CTS TXD Transmit Data n EIA RS 232D data signal that transfers information in form of binary data from a DTE PRELIMINARY 2070 9x User s Manual Page 2 GERNERAL DESCRIPTION The 2070 9xx is a 33 6Kbps dial up modem in a for
10. hut down This prevents noise from getting though the Receiver The Receiver section of the modem amplifies the signal it receives through the coupling transformer and filters it so that only frequencies in the correct band will get passed on to the demodulator Signals as low as 6 milliVolts will produce RS 232 level signals 12 at the receiver output Further noise prevention is accomplished through the use of special filter circuits which are used to enable the Carrier Detect Signal There must be 8ms of the Mark frequency present on the input for Carrier Detect to activate When the Carrier Detect signal goes active the Receiver will be enabled That Mark signal will also have to be above a certain threshold before the Mark detect circuit will be activated The CTS delay circuitry will cause the Mark frequency to be present on the receivers input for 12ms When RTS Request to Send is asserted the modem starts transmitting the Mark frequency The Host Computer or Controller will not send data until CTS 15 asserted Data Carrier Detect DCD controls the output of the Receiver and can be used to key the Controller or Host Computer The no signal state of the RXD signal is 12vdc or Mark At the end of a data transmission the Controller or Host Computer de asserts RTS which causes the modem to transmit the Soft Carrier frequency for 10ms At the receiving end the out of band a
11. m factor designed for use in a Model 2070 Controller It is compatible with other V 34 modems and is designed for traffic control environments Located on the front panel of the 2070 9xx is a RS 232 port that can connect the dialup modem to a computer through a female DB9 connector This port can also be connected to the 2070 s bus The phone line connects to the 2070 9xx through a standard RJ 11 connector located on the front panel A second RJ 11 connector is provided for connection to a telephone The 2070 9xx can automatically negotiate line rates from 300bps to 33600 bps operating parameters such as speed etc can be configured using industry standard AT commands The serial port has a maximum speed of 115 2 Kbps and is RS 232 and V 24 compatible The 2070 9xx cannot be used with leased lines The SM336 also features Auto Answer Auto Dial and tone or pulse dialing The 2070 9xx can be factory fitted with a FSK Expansion Card which is a FSK Private wire Modem FSK stands for Frequency Shift Keying which is a modulation scheme that Shifts changes the frequency to represent a digital 1 SPACE or an Mark The FSK option can be configured for the following baud rates 2070 9A 1200bps serial 1200Hz 2200Hz Mark Space Frequencies and 900Hz Soft Carrier frequency 2070 9B 9600bps serial 11200Hz 17600Hz Mark Space Frequencies and 7800Hz Soft Carrier frequency 2070 9E 19
12. n 200 and 4000 Hz PRELIMINARY 2070 9x User s Manual 4 FSK Serial Data Rate 0 19 200 baud Meets EIA RS 232D and CCITT V 24 electrically CTS Delay 12 2 ms Soft Carrier Turnoff Time 10 2ms Receive Squelch 6 5 tims Carrier Detect Time 8 2ms Data Format Asynchronous serial by bit Line interface Private Metallic wire 600 Ohm Modulation Phase Coherent FSK Modulation Frequencies Mark and Space Frequencies have a 1 tolerance Frequency 2070 9A 2070 9B 2070 9E Mark 1200Hz 11200 Hz 19200 Hz Space 2200 Hz 17600 Hz 38400 Hz Soft Carrier 900 Hz 7800 2 13800 Hz 4 wire Full Duplex and 2 wire Half Duplex Receive Sensitivity 0 to 40 dB Output Level Continuously adjustable from 8dBm to 0 dBm set to 0dBm Anti streaming RTS Trigger mode time out 75 Loss of Data mode time out 75 PRELIMINARY 2070 9 User s Manual Page 5 INDICATORS CONNECTORS AND SWITCHES C20 Termination Table Dialup Indicators Transmit Data TX Receive Data RX Data Terminal Ready DTR Data Carrier Detect DCD Data Set Ready DSR Ring Indicator RI Dialup Connectors Phone Connector RJ11 Line Connector RJ11 RJ45 Termination Table Pin Signal 1 NC 2 Board Power On Off switch 3 RING 4 NC Configuration Port DB9 DB9 Termination Table
13. n CA ge CohleclOr t e oe a a 6 INSTALLATION 7 Dialup Configuration Switches ee tesi itis ient 7 DISTANCE OR MAXIMUM UNITS PER LINE eene 9 SYSTEMS WITH NO RTS SIGNAL iii sse 9 SYSTEM PROBLEMS ERROR BOOKMARK NOT DEFINED THEORY OF OPERATION 12 DIALUP MODEM 2 EE EUER EOS 12 BSK OPTION et Eo UE E NER RI E EA Ed 13 B OCK DIAGRAMS 14 DiGlip Block Diagram etd ht tee ee teet eed e endet ae ette deett 14 FSK Expansion Block Diagram ss 15 16 PREVENTATIVE MAINTENANCE 16 16 TROUBLE SHOOTING SEQUENCE 16 17 PRELIMINARY 2070 9x User s Manual Page 1 GLOSSARY Anti Streaming A function on GDI modems that prevents a Host from transmitting continuously DCD Data Carrier Detect An EIA RS 232D control signal that can be used to gate RXD to a DTE DCE Data Communications Equipment A device that converts data from a DTE to a transport stream For example The GDI model 400 modem is a DCE that converts RS232 data from a controller to a FSK Telco system DTE Data Terminal Equipment devi
14. n a system where you are running out of time in polling a large number of intersections While the faster timing will allow for more modems in the same network it also allows for more system errors All modems have to be set for the faster timing Switch position 8 on the dipswitch turns the Anti Streaming circuit on and off The Anti Streaming circuit will turn off the Transmitter after it has been transmitting for 7 seconds continuously This will prevent a single malfunctioning Controller from interfering with other remote modems on the same line This feature is typically used on remote slave modems where the transmitted data packets are short The anti streaming circuit will be active until RTS is de asserted When RTS goes low the anti streaming circuit will reset automatically and the Controller can then transmit again PRELIMINARY 2070 9x User s Manual Page 9 The Anti Streaming feature is not normally activated on a Local Master modem since they are transmitting continuously to all of the remotes slaves If there is a possibility that a message may go over 5 seconds do not use the Anti Streaming Feature The Input impedance can be changed with switch 8 Normally the 600 Ohms position is used but where reduced loading is required the high impedance position can be used for units not at the end of a line SHORT TIMING In a system with many Modems on a line you may find that you can t get to every Con
15. n on provides a current path for the quad SPST relay that connects disconnects the controller power supply to the 2070 9 Isolation from the controller s power supply is provided by a encapsulated transformer coupled DC to DC converter which provides the necessary power for both the smart modem and the FSK Expansion Board Isolation from the 2070 controllers I O bus is provided by the use of opto isolaters that link the signals from the controller to the smart modem while isolating power and ground The RS 485 signals are first converted to TTL using single supply line drivers The signals are then fed to the opto isolators The ouputs of the opto isolaters are fed to a PLD The functionality of the Programable Logic Device is created by the GDI engineering staff not by the manufacturer of the part This makes it possible to make the modem configurable for different modes of operation without the need for dozens of costly descrete components switches and jumpers It also provides a means for making rapid changes to the functionality without increasing the cost to the user There are four switches connected to the PLD which configures all modes for the board This includes RTS CTS handshaking modes RS 485 inversion and DB9 configuration The PLD then routes the signals to the correct outputs The signals from SP1 are always routed to the smart modem module The signals from SP2 can be routed to the fr
16. nd soft carrier filters all cause the receiver to shut down Without these special filters the receiver could respond to the transition from soft carrier to no signal and could create a false start bit The Block diagram of the FSK modem shows how the different sections of the modem are interconnected PRELIMINARY 14 2070 9x User s Manual Block diagrams Dialup Block Diagram Kejdsiq 3NOHd 18 14 eur uonejos sng 987 54 SNS 040 PRELIMINARY 15 2070 9 User s Manual FSK Expansion Block Diagram jndu oipny oipny dwy ndu ssedpueg duy indino 10 2 ABGieuz duy yojanbs J9AI929M 04402 joquog 0 2 yos pueg yojanbs jonuog Jaep Je uq jndjno axy 512 43 axl PRELIMINARY 2070 9 User s Manual 16 MAINTENANCE Preventative Maintenance There is no preventative maintenance required or anything that needs to be adjusted for the life of the product Trouble analysis The model 2070 9xx is a fairly complex Modem with hundreds of parts This makes this Modem hard to trouble shoot for the
17. ont panel DB9 But normally the DB9 is connected to the smart modem which provides a means to manually configure it using the AT command set However the smart modem is typically configured on the fly by the controller via SP1 using an AT command string The signals are then modulated De Modulated by the smart modem and transmitted Received out in the RJ11 connecter after first passing through the line filters The line filters filter out and noise from the telephone system that might create signal degradation and cause errors The logic state of the signals are displayed on the front panel useing LEDs When the LED is lit the signal is active Each status signal is buffered by an N Channel MOSFET transistior which provides the necessary current for the LED The speaker is driven by a monolithic 700 mW low voltage power amplifier which is connected directly to the smart modem PRELIMINARY 2070 9x User s Manual Page 13 The ouput signals from SP2 are directly connected to a 50 pin socket which the FSK Expansion Board plugs in to The Expansion Board provides all signal isolation to both the controller and the line FSK Option The Space Frequency is used to transmit a digital 1 and the Mark frequency is used to transmit a digital 0 At the end of the data transmission the Soft Carrier frequency is transmitted for 10 ms The Soft Carrier is to causes the receiving modems receiver section to s
18. peration Configuring the 2070 9xx is achieved through a series of switches on the front panel and on the board itself The configuration switches for the dialup modem are located on the top of the main board closer to the front panel Refer to the following table when configuring the modem Dialup Configuration Switches Switch Closed Open 1 DB9 SP2 Dial Up 2 DM9 mode DCE DTE 3 RTS mode High Normal 4 RS 485 Normal Inverted 5 Future Expansion Switch 1 Default Open Open When switch 1 is open the dialup modem can be configured via the front panel DB9 connector Closed When switch 1 is closed the DB9 is connected to the controllers SP1 port Switch 2 Default Closed Open When switch 2 is open the directionality of the port is DTE Closed When switch 2 is closed the directionality of the port is DCE Switch 3 Default Open Open RTS CTS handshaking is active Closed RTS CTS handshaking is not active and RTS is asserted constantly Switch 4 Default Open Open The RS 485 signals are inverted Closed The RS 458 signals are not inverted PRELIMINARY 2070 9 User s Manual Page 8 FSK Configuration Switches Switch FUNCTION Pos 1 Full Duplex ON Off for Half 2 Half Duplex ON Off for Full 3 RTS timing ON short timing 4 Soft Carrier Timing ON Short timing 5 Rec Squelch ON for Half duplex 6 Rec Squelch Timing ON
19. troller in the allotted time period By switching over to the Short timing positions on the dipswitch you can save 12 ms per poll and response To use short timing switches 3 4 6 and 7 should be turned ON for all of the units on a particular line As mentioned previously there is the possibility of more communication errors with short timing You will have more errors because there is a greater possibility of noise activating one of the Carrier Detect circuits Once the receiver is turned on the error rate is the same On systems with good quality wire you may not notice any change in system errors DISTANCE OR MAXIMUM UNITS PER LINE The signal level on a line is determined by 1 The length of the line 2 The quality of the line 3 The number of units on the line 4 The transmitted signal level We can do anything about the length and quality of the line but we can adjust the transmitted signal level and the input impedance of the 496 Modem The output level of the 496 is set at the factory to 0 dBm A 0 dBm signal is normally good enough to give you a range of 5 6 miles on 22 AWG wire 19 AWG wire will give you another 20 more distance The output signal level can be increased to 10 dBm by adjusting the potentiometer VR2 which is labeled This can give you as much as 25 more distance The signal levels are measured across a 600 Ohm resistor If you are going to measure the output level load the
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