Patton electronic 1070RC User Manual

Page 19

5.2 POWER-UP

There is no power switch on the Model 1070RC: Power is

automatically applied to the 1070RC when its card-edge connector
makes contact with the chassis' mid-plane socket, or when the chassis'
power supply is turned on.

Note: The 1070RC is a "hot swappable"

card--it will not be damaged by plugging it in or removing it while the
rack is powered up.

When the local and remote Model 1070RCs are

both powered up, and

are passing data

normally, the following LED conditions will exist:

• PWR = green
• TD & RD = flashing red and green
• Control In & Control Out = green
• TEST = off

5.3 TEST MODES

The Model 1070RC offers two diagnostic modes: local analog loop

and remote analog loop. These test modes are activated
simultaneously by depressing the "Test" button on the front panel of the
Model 1070RC.

Local Analog Loop

The Local Analog Loop test mode causes any data sent to the

local 1070RC by the local RS-232 device to be echoed

back to that RS-

232 device. For example, characters typed on the keyboard of a
terminal will appear on the terminal screen. If characters are not
echoed back, check the connection between the local RS-232 device
and the local 1070RC. All 1070RC's in the system should be tested in
this manner

Remote Analog Loop

The Remote Analog Loop test mode causes any characters sent

from the

remote 1070RC to the local 1070RC to be returned back to the

remote device (see Figure 13). Note: Only the local 1070RC should
be in "test" mode. The remote 1070RC should be in "normal"
operating mode or this test will not work. If no characters are echoed
back, check the wiring between the two 1070RCs. Be sure to wire the
units according to the instructions in Section 4.0 Installation.

Local 1070RC

In Normal Mode

Remote 1070RC

In Normal Mode

TX+

TX-

RX-

RX+

RX-

TX-

TX+

Local 1070RC

In Loopback Mode

Remote 1070RC

In Normal Mode

RX+

RX-

TX-

TX+

TX-

RX-

RX+

Figure 13. Normal operating mode vs. loopback test mode