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Purpose:
To verify the integrity of all RS-232 electrical cable connections between the Master unit
and Slave units over a LAN. It also enables the user to become familiar with the
functions of the TC3420. When installing new Slave units into a network, this test should
be performed between each individual Slave and the Master unit.
Note: the BERT tester should only be connected to the TC3420 (Master).
Equipment
Requirements:
One (1) Bit Error Rate Tester (BERT) Set with appropriate interface module.
One (1) DB9 Serial Cable.
Procedure: 1.
Set up the bench test as shown in Figure 18. Connect the Master unit and Slave units to
an Ethernet switch. Connect the BERT tester to the Master unit.
2.
Make sure all DIP switches are in the appropriate positions for all units being tested.
3.
The "BRD" LED on the Master's front panel should be on, indicating the transmission of
a broadcast message; the "BRD" LED on each Slave's front panel should be on,
indicating receipt of the broadcast message.
4.
Set SW4 (RMTLB) to down "On" position, on the Slave unit to be tested.
Note:
It is normal for the RMTLB and ALARM LEDs to flash on the Slave unit being
tested since the unit is in diagnostic mode.
5.
The "BRD" and "RSP" LEDs should be "on" on both the Master unit and Slave unit being
tested, indicating good signal is received by the TC3420s and transmitted back to the
tester. The BERT tester should indicate a "SYNC" signal. This test can be performed
on each Slave unit connected to the Switch.
