Yaesu FT-857 Technical Supplement page 20

Alignment
RX Gain Adjustment
1. Tune the transceiver to the 1.8 MHz band in the CW
mode.
HF1RXG" in the menu by rotating the SELECT
2. Select "HF1RXG
HF1RXG HF1RXG
HF1RXG
knob, if necessary.
3. Inject an RF signal from the signal generator at 9 dBμ
output.
4. Adjust the "HF1RXG HF1RXG" parameter by rotating the main
HF1RXG HF1RXG HF1RXG
DIAL knob to the point where the S-meter indicates
"S1."
5. The other RX gain adjustments (see the chart below)
should be performed in the same way. The output lev-
els of the signal generator at each frequency are shown
below.
Menu Frequency
01: HF1RXG 1.8 MHz Band
01: HF1RXG 01: HF1RXG
01: HF1RXG 01: HF1RXG
02: HF2RXG 7 MHz Band
02: HF2RXG 02: HF2RXG
02: HF2RXG 02: HF2RXG
03: HF3RXG 21 MHz Band
03: HF3RXG 03: HF3RXG 03: HF3RXG 03: HF3RXG
04: 50MRXG 50 MHz Band
04: 50MRXG 04: 50MRXG
04: 50MRXG 04: 50MRXG
05: VHFRXG 144 MHz Band
05: VHFRXG 05: VHFRXG 05: VHFRXG 05: VHFRXG
06: UHFRXG 430 MHz Band
06: UHFRXG 06: UHFRXG
06: UHFRXG 06: UHFRXG
SSB S-Meter Adjustment
1. Tune the transceiver to the 21 MHz band in the CW
mode.
2. Inject an RF signal from the signal generator at 36 dBμ
output.
07: SSB-S9" and press the [ A ] key
3. Select menu item "07: SSB-S9
07: SSB-S9 07: SSB-S9 07: SSB-S9
to set this parameter.
4. Increase the signal generator output level to 86 dBμ.
08: SSB-FS" and press the [ A ] key
5. Select menu item "08: SSB-FS
08: SSB-FS 08: SSB-FS
08: SSB-FS
to set this parameter.
FM S-Meter Adjustment
1. Tune the transceiver to the 144 MHz band in the FM
mode.
2. Inject an RF signal from the signal generator at 0 dBμ
output, with ±3.5 kHz deviation FM Modulation of a 1
kHz tone.
09: FM-S1" and press the [ A ] key
3. Select menu item "09: FM-S1
09: FM-S1 09: FM-S1
09: FM-S1
to set this parameter.
4. Increase the signal generator output level to 25 dBμ.
10: FM-FS" and press the [ A ] key
5. Select menu item "10: FM-FS
10: FM-FS 10: FM-FS 10: FM-FS
to set this parameter.
20
Output Level of SG
9 dBμ
9 dBμ
6 dBμ
3 dBμ
0 dBμ
0 dBμ
FM Center Meter Adjustment
1. Tune the transceiver to the 144 MHz band in the FM
mode.
2. Inject an RF signal from the signal generator at 10 dBμ
output, with ±3.5 kHz deviation FM Modulation of a 1
kHz tone.
3. Set the frequency of the signal generator 3 kHz below
the receiving frequency of the transceiver.
11: DISC-L" and press the [ A ] key
4. Select menu item "11: DISC-L
11: DISC-L 11: DISC-L
11: DISC-L
to set this parameter.
5. Set the frequency of the signal generator 3 kHz above
the receiving frequency of the transceiver.
12: DISC-H" and press the [ A ] key
6. Select menu item "12: DISC-H
12: DISC-H 12: DISC-H
12: DISC-H
to set this parameter.
FM Squelch Adjustment
1. Tune the transceiver to the 144 MHz band in the FM
mode. Confirm that the squelch knob is turned fully
counterclockwise.
2. Inject an RF signal from the signal generator at –15
dBμ output, with ±3.5 kHz deviation FM Modulation
of a 1 kHz tone.
13: FM-TH1" and press the [ A ] key
3. Select menu item "13: FM-TH1
13: FM-TH1 13: FM-TH1 13: FM-TH1
to set this parameter.
14: FM-TH2" and press the [ A ] key
4. Select menu item "14: FM-TH2
14: FM-TH2 14: FM-TH2 14: FM-TH2
again.
5. Increase the signal generator output level to 0 dBμ.
15: FM-TI1" and press the [ A ] key
6. Select menu item "15: FM-TI1
15: FM-TI1 15: FM-TI1
15: FM-TI1
to set this parameter.
16: FM-TI2" and press the [ A ] key
7. Select menu item "16: FM-TI2
16: FM-TI2 16: FM-TI2
16: FM-TI2
again.
Power Supply Voltage Display Adjustment
1. Tune the transceiver to the 144 MHz band in the FM
mode. Confirm that the power supply voltage is 13.8
V (±0.1 V).
2. Select menu item "17: VCC 17: VCC" and adjust this parameter
17: VCC 17: VCC 17: VCC
such that "138 138" is displayed on the LCD.
138 138
138