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7

8

S1-3: Carrier Delay

The setting for switch S1-3 determines whether the carrier is

“Constantly On” or “Controlled by RTS”. This setting allows for opera-
tion in switched carrier, multipoint and/or hardware handshaking appli-
cations.

S1-3

Setting

On

Controlled by RTS

Off

Constantly ON

S1-4: Echo Mode

The setting for switch S1-4 determines whether the Model

1004ARC echoes data back to the transmitting device (half-duplex
mode only).

S1-4

Setting

On

Echo On

Off

Echo Off 

SWITCH SET “S2”

DIP switch S2 is used to configure transmit impedance, and

2-wire/4-wire operations. The summary table below shows the factory
default settings for switch S2. Following the summary table is a
detailed description of each individual switch.

S2-1 and S2-2: “Transmit Off” Impedance

Switches S2-1 and S2-2 are set together to determine whether the

receiving device “sees” the impedance of the Model 1004ARC’s trans-
mitter as being “high” or “intermediate” when the transmitter is turned
off. The “intermediate” setting is useful in half-duplex environments
where the receiving device does not respond well to the “high” setting.

S2-1

S2-2

Setting

On

On

Intermediate Impedance

Off

Off

High Impedance

S2-3 and S2-4: 2-wire/4-wire Modes

Switches S2-3 and S2-4 are set together to determine whether the

Model 1004ARC is in 2-wire or 4-wire operating mode. Note: 2-wire
mode is half-duplex only.

S1-2

S1-3

Setting

On

On

2-wire mode

Off

Off

4-wire mode

3.1.2  SWITCH SETTINGS - MODEM “B”

DIP switches S3 and S4 configure short range Modem B on the

Model 1004ARC front card. The tables below provide an overview  of
Modem A switch settings, including factory default settings. Following
each figure is a detailed description of each switch’s function.

SWITCH SET “S3”

DIP switch S3 is used to configure receive impedance, RTS/CTS

delay, carrier control operation and “echo” enable/disable. The summa-
ry table below shows the factory default settings for switch S3.
Following the summary table is a detailed description of each individual
switch.

SWITCH S2 SUMMARY TABLE (factory defaults in bold)

Position

Function

ON Position

OFF Position

S2-1*

TX OFF Impedance

Intermediate

High

S2-2*

TX OFF Impedance

Intermediate

High

S2-3*

2-Wire/4-Wire

2-Wire

4-Wire

S2-4*

2-Wire/4-Wire

2-Wire

4-Wire

*Note:

Switches S2-1 and S2-2 must be switched simultaneously.

Switches S2-3 and S2-4 must be switched simultaneously.

SWITCH S3 SUMMARY TABLE (factory defaults in bold)

Position

Function

ON Position

OFF Position

S3-1

RX Impedance

120 Ohm

16K Ohm 

S3-2

RTS/CTS Delay

8 msec

No Delay

S3-3

Carrier Control

RTS Controlled

Constantly On

S3-4

Echo Mode

Echo ON

Echo OFF

Содержание 1004ARC

Страница 1: ...igh Speed Multipoint Short Range Modem Rack Mount Card SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M1004ARC B Doc 047051UB Revised 05 05 99 C E R T I F I E D An...

Страница 2: ...es arising from the use of or inability to use this product Patton Electronics specifically disclaims all other warranties expressed or implied and the installation or use of this product shall be dee...

Страница 3: ...low impedance settings Carrier can be set as constantly on or controlled by RTS Able to operate with or without echo Features 6 easy to read LEDs Silicon Avalanche Diode surge protection Fits convenie...

Страница 4: ...ions of each switch s function SWITCH SET S1 DIP switch S1 is used to configure receive impedance RTS CTS delay carrier control operation and echo enable disable The summary table below shows the fact...

Страница 5: ...odes Switches S2 3 and S2 4 are set together to determine whether the Model 1004ARC is in 2 wire or 4 wire operating mode Note 2 wire mode is half duplex only S1 2 S1 3 Setting On On 2 wire mode Off O...

Страница 6: ...h S4 is used to configure transmit impedance and 2 wire 4 wire operations The summary table below shows the factory default settings for switch S4 Following the summary table is a detailed description...

Страница 7: ...osed position the strap links RJ 11 pins 1 and 6 RJ 45 pins 2 and 7 to frame ground These pins can be used as connections for the twisted pair cable shield In the open disconnected position pins 1 and...

Страница 8: ...CHASSIS The Model 1000R16 Rack Chassis Figure 5 has sixteen short range modem card slots plus its own power supply Measuring only 3 5 high the Model 1000R16 is designed to occupy only 2U in a 19 rack...

Страница 9: ...ipment Therefore it wants to connect to a DTE Data Termination Equipment If your RS 232 output device is a DTE you may need to use a special cable such as a DB 25 to modular cable If your RS 232 outpu...

Страница 10: ...SIGNAL PIN PIN SIGNAL XMT 3 3 XMT XMT 4 4 XMT RJ 45 Cable 2 Wire SIGNAL PIN PIN SIGNAL XMT 4 4 XMT XMT 5 5 XMT Connection to ground is optional 4 4 2 MULTIPOINT TWISTED PAIR CONNECTION The Model 1004...

Страница 11: ...Surge Protection Silicon Avalanche Diodes Control Signals DSR turns ON immediately after the termi nal raises DTR DCD turns ON after re cognizing the receive signal from the line CTS turns on after th...

Страница 12: ...ce table as a general guideline only APPENDIX C PATTON ELECTRONICS MODEL 1004ARC FACTORY REPLACEMENT PARTS The Patton Model 1004ARC rack system features interchangeable rear half cards power cords fus...

Страница 13: ...Wire RJ 45 Contact Number Circuit Description 1 N A Not Used 2 125 DSR 3 109 Received Line Signal Indicator CD 4 108 2 DTE Ready DTR 5 102 Signal Common 6 104 Received Data 7 103 Transmitted Data 8 10...

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