Yaesu FT-7900E, Technical Supplement

Page: 13 / 50

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.