Motorola V8162, Service Manual

Page: 46 / 93

V8160
Step 7. With all necessary adjustments made
and power Step “0B” showing in the display,
depress * to enter all updated data and exit
the 73# command.
Maximum Deviation Adjust
Step 8. Inject an unbalanced 1kHz 2.24V
rms audio signal at J3 pin 8 (TX audio in).
Connect the audio generator ground lead to
J3 pin 6 (audio ground). The audio signal
source must be low impedance (or the injec-
tion signal must be measured at pin 10 to
ensure the proper level of 2.24 V rms).
Step 9. Enter the following commands:
58# to enable compandor
10# to unmute TX audio
356# to select external audio path
11434# to place the telephone on channel 434
Step 10. Enter 72#. Step 04 will be displayed
on the left side of the display. Use the * but-
ton to toggle down to Step 0B (left side of
display).
Step 11. Read the peak deviation on the
analyzer. If it is not in the range of 11 to 12
kHz (preferably closer to 12kHz). Use the
volume control or enter numbers via the key-
pad (as explained in Step 6) to adjust the
maximum deviation to fall within the 11 to
12 kHz range. (Make adjustments so that the
deviation remains as close to 12 kHz as
possible, without exceeding 12 kHz.).
Step 12. Depress the * key to exit the 72#
command. The display should show the ’
prompt.
Microphone Deviation Adjust
Step 13. Adjust audio generator signal level
at J3 pin 8 (TX audio in) to 90 mV rms (still
at 1 kHz).
Step 14. Enter 11434# to place the portable
on channel 434. Enter 356# to select the
external handset audio path.
Step 15. Read the average deviation on the
analyzer. If reading is 2.05 kHz + 7% (corre-
sponds to 2.9 kHz peak), proceed to Step 28.
If it is not, enter 72#, use the * button to tog-
gle down to Step 05 (left side of display),
and use the volume control or enter numbers
via the keypad (as explained in Step 6) to
adjust for a microphone deviation of 2.05
kHz + 7%. After adjustment, note the hex
value for Step 05 and exit the 72# command
by repeatedly depressing the * button until
the display shows the ’ prompt.
Step 16. Enter 72#, use the * button to toggle
down to Step 06 (left side of display), and
Table 13:
Note
In order to enter hex digits A thru F,
depress the SND button followed by:
0 hex A
1 hex B
2 hex C
3 hex D
4 hex E
5 hex F
Table 14:
Note
Before SAT, DTMF, data, or microphone
deviations can be adjusted, the maximum
deviation must be checked (and adjusted,
if necessary). Proceed as follows.