TSW200E1
On the left side, there are two control indicator LEDs:
• RUN: this LED is on when a test is in progress.
• SYN: sync LED. Turned on when the Test Set is in sync with the received data. This
LED should be on when any test is running. Otherwise, the number of errored bits and
blocks displayed is not trustworthy.
The 11 status LEDs follows. When they are turned on during tests, they indicate the
occurrence of alarms.
NO SIGNAL: on to indicate that the 2M stream signal is missing.
• NO CLOCK: on to indicate that the clock is missing.
• AIS: on when there is any alarm (AIS - Alarm Indication Signal).
• ALL1: getting all 1s
• ALL0: getting all 0s
• FAS LOSS: Indicates frame sync loss.
• CAS LOSS: Indicates multiframe sync loss
• PAT LOSS: Indicates pattern sync loss. The expected pattern is not being received.
• SLIP: clock SLIP counting
• RE.AL.: Indicates remote alarm
• RMF. AL: Indicates multiframe remote alarm
These LEDs are followed by three error LEDs:
• CRC ERR: When on, indicates CRC error or a CRC Loss
• FAS ERR: When on, indicates FAS error
• BIT ERR: When on, indicates bit error
Two interface indicator LEDs remain turned on to show that the interface is being used:
• RS232
• V.35 / V.36
On the right side of the front panel, there are the signal LEDs. When the equipment is under
test, some of these LEDs must be turned on, indicating that there are active signals from the RS232,
V.35, V.36, G703 - 64k interfaces.
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