B&B Electronics 1140 - Manual (Page 14)

12 Documentation Number 11401198 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5105
5.2.3 USING THE V.52 BER TEST INDEPENDENTLY
The V.52 BER test can be used independently of the V.54
loopback tests. This requires two operators: one to initiate and
monitor the test at the local Model 1140, and one at the remote
Model 1140. To use the V.52 BER test by itself, both operators
should simultaneously follow these steps:
1. Locate the "511/511 E" toggle switch on the front panel of the
1140 and move it DOWN. This activates the V.52 BER test mode
and transmits a "511" test pattern to the other unit. If any errors are
present, the receiving modem's red "Error" LED will blink
sporadically. NOTE: For this test to function, the "511" switch on
both Model 1140s must be on.
2. If the test indicates no errors are present, move the V.52
toggle switch UP, activating the "511/E" test with errors present. If
the test is working properly, the receiving modem's red "Error" LED
will glow. A successful "511/E" test will confirm that the link is in
place, and that the Model 1140's built-in "511" generator and
detector are working properly.
5.3 POWER UP
Once the Model 1140 is properly installed, it should operate
transparently—as if it were a standard cable connection. Since
operating power is derived from the RS-232 data and control
signals; there is no "ON/OFF" switch. All data signals from the
RS-232 interface are passed straight through.