S768DAV – S7768DAV User Manual
Operation
11-0768DAV-B/ December 2003
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1)
Set the DATA SELECT switch on the S768DAV you are testing to F (TX Test Mode). At this end
only, wire the data connections as follows (refer to Table 14):
•
Connect the DATA IN+ pin to the DATA OUT+ pin.
•
Connect the DATA IN- pin to the DATA OUT- pin.
2)
At the opposite end, set the DATA SELECT switch on the S768DAV to E (RX Test Mode).
3)
The transmitting unit should operate as follows:
•
ENABLED LED is RED, indicating that a valid data format has not been selected.
•
DATA OUT LED is slowly flashing between amber, green, and off. This indicates that the test
mode is generating an output pattern and sending it out on copper.
•
DATA IN LED should mimic the DATA OUT LED. This indicates a good, proper loopback
connection, and proves that the data transmit/receive circuitry is working properly.
•
LEVEL/LOSSTM might be red or green indicating received fiber signal strength.
4)
The receiving unit should operate as follows:
•
ENABLED LED is GREEN indicating a valid data format is selected.
•
DATA OUT LED should slowly flash amber, green, off. This indicates that the fiber path from the
unit set for Test mode is reliable.
•
DATA IN LED should be OFF indicating there is no input copper connection made.
•
LEVEL/LOSS LED should be green to off (but not red), indicating that sufficient optical power is
being received.
•
The AUDIO OUT LEDs should be green indicating sufficient audio output signal level.
5)
In addition to the LED operation described above, verify the following:
•
The monitor displays a ramp test pattern as shown in Figure 13.
•
A 1 kHz test tone is emitted on the audio system connected to the receiving unit.
After the test has been performed at one end, swap switch positions and connectors to perform the test
on the other end. If the test is successful, the copper-in-to-fiber-to-copper-out conversion is working in
both directions.
