P
AGE
14
05776-1198 <90-00124>
21.
Remove the termination from the dB meter and verify a level of 0
dB at the front panel blue XMT LVL test points for both channels 1
and 2.
22.
Terminate the meter with 600 ohms and verify a level of +7 dB at
the front panel RCV DROP jack of channel 1.
23.
With the meter still terminated, verify the level at the front panel
RCV DROP jack of channel 2 is -40 dB or more negative.
24.
Move the signal generator to C2 pins 20 and 45.
25.
Move the level meter to C2 pins 19 and 45
26.
Verify a level of +7 dBm
27.
Remove the signal generator and dB meter.
28.
Using connector C2 connect the A18-05776-XX assembly to two
B11-46105-00 systems that are in the working in the terminal
mode. One will be connected to channel 1 and the other to
channel 2.
29.
On the C2 connector of the A18-05776-00 that is used to connect
to the terminal mode 46105 modules, jumper pins 12 to 37 and
11 to 36.
30.
Talk through the system in both directions and verify the module
works properly.
31.
Verify that the green LEDs on the front panel light steadily for the
channel(s) that you are using. When a light is on, it means the
framing bit is being detected by the digital section of that channel
of the module, indicating synchronization of data transmitted to it.
32.
Operation of the 46105 module consists of talking through the sys-
tem in either direction. The front panel RCV SYNC LED for the
channel that you are using lights steadily if the data being received
is in synchronization with the transmitting unit.
33.
If the module is working in the repeater mode and the synchroniza-
tion signal is lost in either direction, the unit automatically reverts
to the terminal mode, allowing continued communications in the
direction from which the synchronization is still being received.
When synchronization is re-established, repeater operation re-
sumes. Verify that that a loss of a terminal from one direction has
no effect on the opposite direction of the system.
34.
With the Order Wires talking to one another, remove the handset
and hit the Touch Tone pad on the A18-05775-00 and verify that
the tones can be heard at the other OW sites.
35.
Hang up the handset.
36.
At the remote location, on the Channel 1 side of the 46105, remove
a handset and verify that C2 Pins 39 and 40 of the A18-05776-01
are closed.
ALIGNMENT PROCEDURES
CONTINUED
. . .
