Yaesu FT-857 Technical Supplement page 21

In case the transmission power is not within the speci-
fied tolerance, adjust this parameter for 20 W (±2 W)
of transmission power.
15.Select menu item "42: VHF-MIN 42: VHF-MIN." Key the transmit-
42: VHF-MIN 42: VHF-MIN
42: VHF-MIN
ter, and confirm that the output power is 5 W (+0/–1
W). In case the power is not within the specified toler-
ance, adjust this parameter for 5 W (+0/–1 W) of trans-
mission power.
16.Tune the transceiver to the 430 MHz band in the CW
mode.
17.Select menu item "43: UHF-MAX 43: UHF-MAX." Key the transmit-
43: UHF-MAX 43: UHF-MAX
43: UHF-MAX
ter, and adjust this parameter for 20 W (±1 W) of trans-
mission power.
18.Select menu item "44: UHF-MID 44: UHF-MID." Key the transmit-
44: UHF-MID 44: UHF-MID 44: UHF-MID
ter, and confirm that the output power is 2 W (±0.3 W).
In case the transmission power is not within the speci-
fied tolerance, adjust this parameter for 2 W (±0.3 W)
of transmission power.
TX Gain Adjustment
1. Set the transceiver to the USB mode.
2. Inject a 1 kHz tone at 1 mV level to the MIC jack.
3. Tune the transceiver to the 1.8 MHz band.
4. Select menu item "45: HF1TXG 45: HF1TXG." Key the transmitter,
45: HF1TXG 45: HF1TXG
45: HF1TXG
and adjust this parameter for 70 W (±10 W) of trans-
mission power.
5. The other TX gain adjustment menus, "46: HF2TXG
"47: HF3TXG 47: HF3TXG," and "48: 50MTXG 48: 50MTXG," should be adjusted
47: HF3TXG 47: HF3TXG 48: 50MTXG 48: 50MTXG
47: HF3TXG 48: 50MTXG
in the same manner as detailed above on the 7 MHz,
21 MHz, and 50 MHz bands, respectively.
6. Tune the transceiver to the 144 MHz band.
7. Select menu item "49: VHFTXG 49: VHFTXG." Key the transmitter
49: VHFTXG 49: VHFTXG
49: VHFTXG
and adjust this parameter for 35 W (±5 W) of transmis-
sion power.
8. Tune the transceiver to the 430 MHz band.
9. Select menu item "50: UHFTXG 50: UHFTXG." Key the transmitter
50: UHFTXG 50: UHFTXG
50: UHFTXG
and adjust this parameter for 10 W (±2 W) of transmis-
sion power.
ALC (Automatic Level Control) Meter Adjustment
1. Tune the transceiver to the 21 MHz band in the USB
mode.
2. Select menu item "51: ALC-1
without microphone input and press the [ A ] key. Now,
a value which the microprocessor computes will be
displayed on the LCD.
3. Rotate the main DIAL knob to adjust this parameter to
a reading four digits lower than the parameter value
displayed in the previous step.
4. After setting the parameter, confirm that all the dots of
the ALC meter have gone out.
5. Select menu item "52: ALC-M
level to the MIC jack.
6. Press the [ A ] key and confirm that the ALC meter shows
an "S-8" S-meter reading on the LCD.
AFP (Automatic Final Protection) Adjustment
1. Tune the transceiver to the 1.8 MHz band in the CW
mode, and connect a 150-Ohm dummy load to the an-
tenna jack.
2. Select menu item "53: HF1-RV
and adjust this parameter for an "S-8" S-meter reading
on the LCD.
3. The other AFP adjustment menus, "54: HF2-RV
HF3-RV," and "56: 50M-RV
HF3-RV HF3-RV
HF3-RV HF3-RV
the same manner as shown above on the 7 MHz, 21
46: HF2TXG," 46: HF2TXG 46: HF2TXG 46: HF2TXG
MHz, and 50 MHz bands, respectively.
4. Tune the transceiver to the 144 MHz band.
5. Select menu item "57: VHF-RV
and adjust this parameter for an "S-6" S-meter reading
on the LCD.
6. Tune the transceiver to the 430 MHz band.
7. Select menu item "58: UHF-RV
and adjust this parameter for an "S-3" S-meter reading
on the LCD.
Carrier Level Adjustment
1. Tune the transceiver to the 21 MHz band in the CW
mode.
2. Connect a 50-Ohm dummy load to the HF/50MHz
antenna jack.
8. Select menu item "59: CW-CAR
and adjust this parameter for an "S-9" S-meter reading
on the LCD.
3. Connect the oscilloscope to the HF/50MHz antenna
jack via an appropriate attenuator.
4. Set the transceiver to the AM mode.
5. Inject a 1 kHz tone at 1 mV level to the MIC jack.
6. Select menu item "60: AM-CAR
and adjust this parameter for 33% AM modulation on
the oscilloscope.
Alignment
51: ALC-1." Key the transceiver
51: ALC-1 51: ALC-1
51: ALC-1
52: ALC-M." 1 kHz tone at 4 mV
52: ALC-M 52: ALC-M
52: ALC-M
53: HF1-RV." Key the transmitter,
53: HF1-RV 53: HF1-RV
53: HF1-RV
54: HF2-RV," "55:
54: HF2-RV 54: HF2-RV 54: HF2-RV
56: 50M-RV," should be adjusted in
56: 50M-RV 56: 50M-RV
56: 50M-RV
57: VHF-RV." Key the transmitter,
57: VHF-RV 57: VHF-RV
57: VHF-RV
58: UHF-RV." Key the transmitter,
58: UHF-RV 58: UHF-RV
58: UHF-RV
59: CW-CAR." Key the transmitter,
59: CW-CAR 59: CW-CAR
59: CW-CAR
60: AM-CAR." Key the transmitter,
60: AM-CAR 60: AM-CAR 60: AM-CAR
55: 55: 55: 55:
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