Yaesu FT-7900R/E - Meter Sensitivity and DC Voltmeter Alignment; Closing Alignment Mode

FT-7900R/E Technical Supplement
Center Meter Sensitivity
1. Press the
[
BAND
(
SET
)]
key, then rotate the DIAL knob
to set the display to “B5006”.
2. Press the
[
BAND
(
SET
)]
key while press and holding
the
[ (
L
)]
key to set the Alignment parameter to “A-
6 CNTL/V.”
3. Inject a 1 kHz audio tone at a level of +10 dBµ from
the Audio Generator.
4. Press the
[
LOW
(
ACC
)]
key while press and holding
the
[ (
L
)]
key.
S-Meter Sensitivity
1. Press the
[
BAND
(
SET
)]
key, then rotate the DIAL knob
to set the display to “B5006”.
2. Press the
[
BAND
(
SET
)]
key while press and holding
the
[ (
L
)]
key to set the Alignment parameter to “A-
7 SM L/V.”
3. Inject a 440.050 MHz signal at a level of –5 dBµ (with
1 kHz modulation @±3.5 kHz deviation) from the RF
Signal Generator.
4. Press the
[
LOW
(
ACC
)]
key while pressing and hold-
ing in the
[ (
L
)]
key.
5. Increase the RF Signal Generator output level to +23
dBµ.
6. Press the
[
V/M
(
MW
)]
key while pressing and holding
in the
[ (
L
)]
key.
7. Press the
[
BAND
(
SET
)]
key, then rotate the DIAL knob
to set the display to “B0206”.
8. Inject a 146.050 MHz signal at a level of –5 dBµ (with
1 kHz modulation @±3.5 kHz deviation) from the RF
Signal Generator.
9. Press the
[
LOW
(
ACC
)]
key while pressing and hold-
ing in the
[ (
L
)]
key.
10. Increase the RF Signal Generator output level to +23
dBµ.
11. Press the
[
V/M
(
MW
)]
key while pressing and holding
in the
[ (
L
)]
key.
Alignment
E-5
DC Voltmeter
1. Set the power supply voltage to 13.8 VDC.
2. Press the
[
BAND
(
SET
)]
key while pressing and hold-
ing in the
[ (
L
)]
key to set the Alignment parameter
to “A-8 BAT SC.”
3. Press the
[
SCAN
(
SEL
)]
key.
To close the Alignment mode
1. Press and hold in the
[
PWR
( )]
switch for 1/2 sec-
ond to turn the radio off.
2. Press and hold in the
[
MHz
(
PRI
)]
key while turning
the radio on.
3. Rotate the DIAL konb so select menu “F-8 NOR/CH.”
4. Press and hold in the
[
BAND
(
SET
)]
key for 1/2 sec-
ond. The radio is turned off automatically, and then
switched on again afterwards with normal operation.