Patton electronics 1045, User Manual

5.0  OPERAT I O N

Once the Model 1045 is properly configured and installed, it should

operate transparently—as if it were a standard cable connection.
Section 5.0 describes reading the LED status monitors, powering-up
and using the built-in V.52 and V.54 test modes.  The Model 1045 is
powered by a 7.5V DC external wall mount transformer.  To power up
the unit, connect the power supply cord to the power jack on the rear of
the Model 1045 and plug the power adapter into the wall.  There is no
ON/OFF switch.

5.1  FRONT PANEL SWITCHES

During normal operation, both front panel switches should be in the

“normal” center position.  To operate a test mode, see Section 5.3.

5.2  LED STATUS MONITORS

The Model 1045 features five front panel LEDs that monitor

transmit data, carrier detect, two test modes and power.  Figure 6
shows the front panel location of each LED.  Following Figure 6 is a
description of each LED’s function.

PWR = Glows green when the Model 1045 is powered up.
TD =

Glows red for a “space” on transmit data.

CD =

Glows red for high on carrier detect.

BERT = Glows red when bit errors occur in test mode (511 pattern);

Lights when 511/E test pattern has been selected.

LOOP = Glows red when the Model 1045 is in remote digital loopback

or local analog loopback mode.

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Figure 6. Model 1045’s LED indicators and test switches 

TD

CD

PWR

BERT

LOOP

511/E RDL

NORMAL

511   LAL

4.2.2   CONNECTION TO AN RS-232 “DCE” DEVICE 

Since the Model 1045 is wired as a DCE, you cannot connect it

directly to another DCE such as a modem, multiplexer or printer.  If you
need to connect the Model 1045 to another RS-232 DCE device, you
must use a 

null modem cable wired according to diagram below.  We

recommend a cable of the shortest possible length, preferably 6 feet or
less.

Connection to Model 1045

†

Connection to DCE Device

DB-25 Pin No.  

DB-25 Pin No.

1 .....................................................1
2 .....................................................3
3 .....................................................2
4 .....................................................8
8 .....................................................4
6 ...................................................20

20 .....................................................6
17 ...................................................24
24 ...................................................17

7 .....................................................7

†

Note:  When connected to another DCE device, the Model 1045

should be configured for “external clock” (see Section 3.3).

4.2.3   CONNECTION TO A V.35 “DCE” DEVICE 

For details on connecting the Model 1045 to a V.35 DCE, please

contact Patton Electronics Technical Support at (301) 975-1007.

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