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 SB 740-91-01
Step
Setting and Instructions
Normal Indication
8.
(con't)
(f) Depress "PNL TEST".
The CHAN 1 and 2 BUSY indicators
shall illuminate during the message
transmission portion of the test.
Menu is displayed.
(g) Set POWER switches on both
N/A
radio sets to the off position.
9. GDU Channel Test Wire
(a) Select K on the keyboard.
At the end of test Running will be
replaced with Complete or Repeat.
An Indication of Complete shall be
obtained. (This display will be
followed by FCT up-time readout
and a status display. The printer
will respond by reproducint the
contents of the display. Observe
that CHEM-20 Max, COM 1-o, COM2=o.
If the CHEM count exceeds 20, then
perform test "A495". The CHEM count
shall not have increased by more
than 20.
Increase 20=Pass
Increase 20=Fail
If the COM 1 or COM 2 error counts
are greater than 0 then perform test
"H" followed by "A95"1 the non-zero
error count shall not have increased.
(b) Press "PNL TEST".
Menu is displayed.
(c) Connect Channel 1 of the
During the transmission of the test
Oscilloscope to the GDU
message, the data output at the GDU
wire line terminal 1 with
wire line terminals shall be ob-
the return to the GDU wire
served. The waveform shall be 1.7
line terminal 2.
VP-P min.
(d) Enter "A88".
If necessary for measurement pur-
poses, this test may be repeated
by selecting "88".
(e) Press "PNL TEST".
Menu is displayed.
Change 1 B-130.8
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