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Installation

24

User’s Manual - DSP19.2 Fast Poll Modem

NOTE:

Be sure switch S1-9 is set to the ON position to enable the remote modem to
respond to remote digital loopback requests. This test is only available in fast-
poll mode at 2400 bps or higher.

Figure 2-8 shows these three loopback diagnostics.

Transmitter

Receiver

Transmitter

Receiver

RTU

Transmitter

Receiver

Transmitter

Receiver

RTU

Transmitter

Receiver

Transmitter

Receiver

RTU

Local (Host) Analog Loop Back

Remote (RTU) Digital Loop Back

Local (Host) Digital Loop Back

Leased Line

HOST

HOST

HOST

Leased Line

Leased Line

Figure 2-8. Loopback Diagnostic Modes

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Содержание DSP19.2

Страница 1: ...DATA CONNECT ENTERPRISE User s Manual For DSP19 2 DSP9612 Fast Poll Modem Document Number 520 01001 101 Rev A...

Страница 2: ...with respect to the quality performance merchantability or fitness for a particular purpose Information in this User s Guide is subject to change without notice and does not represent a commitment on...

Страница 3: ...Poll Mode Only 15 S1 5 Auto RTS 15 S1 6 Transmit Carrier Control 15 S1 7 2 or 4 Wire Operation 16 S1 8 Transmitter Impedance 16 S1 9 Remote Loopback Enable 16 S1 10 Reserved Test Only 17 S2 1 through...

Страница 4: ...lem Solving 25 Appendix B Specifications 26 General Specifications 26 Mechanical Specifications 27 Interface Connector Pin Assignments 27 RS 232 DTE Interface 28 RS 485 DTE Interface 28 Environmental...

Страница 5: ...ack mount Modem Board 13 Figure 2 6 DSP19 2 Modem Transmission Line Interface 20 Figure 2 7 Pin Locations on the Modem s RJ 11C Jack 22 Figure 2 8 Loopback Diagnostic Modes 24 Figure 2 9 Back to Back...

Страница 6: ...o backward compatible with Bell 202 and ITU T V 23 modems The DSP19 2 is the most technologically advanced modem on the market Boasting a fast DSP processor and automatic adaptive equalizer the DSP19...

Страница 7: ...extended temperature range of 40 C to 85 C y Designed with coupling transformers for high voltage isolation and common mode noise rejection in industrial and commercial environments y Operate over voi...

Страница 8: ...Modem Remote Terminal Figure 1 1 Point to Point Network Using the DSP19 2 Modem Workstation Modem Modem Modem Modem Modem Modem Remote Terminal Remote Terminal Figure 1 2 Multipoint Polling Network Us...

Страница 9: ...ound conductor for stand alone units only y A DC power cable model DSP19 2 LV modem only y This User s Manual or CD ROM If your package contents are damaged or missing contact your place of purchase A...

Страница 10: ...e Loopback Control Switch on page 23 Figure 2 1 Front View of the DSP19 2 Modem Back View Figure 2 2 shows the back view of the DSP19 2 stand alone modem Starting from the left side this view shows y...

Страница 11: ...w the steps below to configure the modem s DIP switches to match your DTE RTU interface requirement and the transmission line characteristics If you are not certain about your system s parameters or t...

Страница 12: ...ices and other DTE specific operating parameters 2 Use DIP switch 2 S2 to select the modem s transmitter output level and receiver dynamic range specific leased line conditions The S2 settings apply f...

Страница 13: ...GT1 S3 Y2 U18 U17 D11 D10 Y1 F1 F2 F3 F4 U15 U1 Data Rate 1 Data Rate 2 Data Rate 3 Char Length Auto RTS Tx Carrier 4W 2W Tx Impedance RDLB Disable Factory only Tx Level 1 Tx Level 2 Tx Level 3 Rcv Ra...

Страница 14: ...S1 3 Modem Data Rate 19200 SW1 OFF SW2 OFF SW3 OFF 9600 SW1 ON SW2 OFF SW3 OFF 2400 SW1 OFF SW2 ON SW3 OFF Bell 202T SW1 OFF SW2 OFF SW3 ON V 23 SW1 ON SW2 ON SW3 ON S1 4 DTE Async Character 11 bit 1...

Страница 15: ...elects whether the async character is 10 or 11 bits long This switch setting is ignored when the modem uses FSK modulation S1 5 Auto RTS y S1 5 ON Enable Auto RTS y S1 5 OFF Disable Auto RTS default F...

Страница 16: ...for multi point configuration networks When multiple modems are connected on the same metallic circuit y The transmitter termination should be of high impedance if the modem is not transmitting in or...

Страница 17: ...it Level Switches S2 1 through S2 3 adjust the modem s transmit level Table 2 5 shows the transmit levels you can select using these switches Table 2 3 Transmit Levels S2 1 through S2 3 Switch Setting...

Страница 18: ...fast poll mode 2400 bps or higher S2 7 Anti streaming y S2 7 ON Anti streaming is active S2 7 OFF Anti stream is inactive default Typically anti streaming is used in multi point applications to preve...

Страница 19: ...are connected in a multi point configuration but without an impedance matching bridged such as private metallic circuit environment In this configuration only one receiver should be configured for 60...

Страница 20: ...Line Connector Pin Assignments This Pin Number Corresponds to This Signal 1 Rx 2 Rx 3 Tx Tx Rx 4 Tx Tx Rx 5 Earth Ground optional NOTE When 2 wire half duplex is used the TX pair must be used for bot...

Страница 21: ...on Figure 2 2 on page 10 shows the connection to the Model DSP19 2FP s power interface shows the connection to the Model DSP19 2 LV s power interface WARNING Before you connect a voltage source observ...

Страница 22: ...ng to an RS 485 Device The modem rear panel provide an RJ 11C module jack connector for a 4 pin RS 485 or RS 422 interface in the event that your DTE or RTU does not support the RS 232 interface see F...

Страница 23: ...2 port of the modem the transmit data is loop back to the DTE as receive data This test will verify the modem transmitter receiver and its RS 232 interface along with the connecting cable y Local digi...

Страница 24: ...le in fast poll mode at 2400 bps or higher Figure 2 8 shows these three loopback diagnostics Transmitter Receiver Transmitter Receiver RTU Transmitter Receiver Transmitter Receiver RTU Transmitter Rec...

Страница 25: ...g RS 232 or RS 485 cable between the DTE and the modem The MR LED Modem Ready on the front panel should be ON when the modem is idle Modem does not receive data and the DCD and RxD LEDs are off Check...

Страница 26: ...ation QAM High speed fast poll mode FSK Bell 202T or V 23 compatible Mark 1200 Hz 1300 Hz V 23 Space 2200 Hz 2100 Hz V 23 Soft Carrier 900 Hz Bell 202T only Equalizer Automatic adaptive RTS CTS Delay...

Страница 27: ...d Line 5 position screw terminal includes earth ground Data Terminal Equipment DB 9 female connector for RS 232 RJ 11C module jack for RS485 Interface Connector Pin Assignments Table B 1 Leased Line T...

Страница 28: ...ta Set Ready Modem Ready RTS Input 7 Request To Send CTS Output 8 Clear To Send RS 485 DTE Interface Table B 3 RS 485 DTE Interface RJ 11 Pin Number Corresponds to Signal Name Modem Input or Output 1...

Страница 29: ...DCE shall make the final determination as to the existence and cause of any alleged defect No liability is assumed for expendable items such as lamps and fuses No warranty is made with respect to cust...

Страница 30: ...he serial number for each item you wish to return y A description of the problem you are encountering y The cause of the problem if known A product support specialist may call to verify that the produ...

Страница 31: ...RMA Procedure 31 User s Manual DSP19 2 Fast Poll Modem...

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