Yaesu FT-857 Technical Supplement page 21

Over-current Protection Adjustment
1. Set the transceiver to the CW mode.
2. Select menu item "18: HF1-IC 18: HF1-IC." Tune the transceiver
18: HF1-IC 18: HF1-IC 18: HF1-IC
to the 1.8 MHz band and key the transceiver. Adjust
this parameter for 140 Watts of transmission power.
3. Select menu item "19: HF2-IC 19: HF2-IC." Tune the transceiver
19: HF2-IC 19: HF2-IC 19: HF2-IC
to the 7 MHz band and key the transceiver. Adjust this
parameter for 130 Watts of transmission power.
4. Select menu item "20: HF3-IC 20: HF3-IC." Tune the transceiver
20: HF3-IC 20: HF3-IC
20: HF3-IC
to the 21 MHz band and key the transceiver. Adjust
this parameter for 130 Watts of transmission power.
5. Select menu item "21: 50M-IC 21: 50M-IC." Tune the transceiver
21: 50M-IC 21: 50M-IC 21: 50M-IC
to the 50 MHz band and key the transceiver. Adjust
this parameter for 120 Watts of transmission power.
6. Select menu item "22: VHF-IC 22: VHF-IC." Tune the transceiver
22: VHF-IC 22: VHF-IC
22: VHF-IC
to the 144 MHz band and key the transceiver. Adjust
this parameter for 60 Watts of transmission power.
7. Select menu item "23: UHF-IC 23: UHF-IC." Tune the transceiver
23: UHF-IC 23: UHF-IC 23: UHF-IC
to 430.000 MHz and key the transceiver. Adjust this
parameter for 25 Watts of transmission power.
RF Power Adjustment
1. Tune the transceiver to the 1.8 MHz band in the CW
mode.
2. Select menu item "24: HF1-MAX 24: HF1-MAX." Key the transmit-
24: HF1-MAX 24: HF1-MAX
24: HF1-MAX
ter, and adjust this parameter for 100 Watts (±5 W) of
transmission power.
3. Select menu item "25: HF1-MID2 25: HF1-MID2." Key the transmit-
25: HF1-MID2 25: HF1-MID2 25: HF1-MID2
ter, and confirm that the output power is 50 W (± 5W).
In case the transmission power is not within the speci-
fied tolerance, adjust this parameter for 50 W (± 5 W)
of transmission power.
4. Select menu item "26: HF1-MID1 26: HF1-MID1." Key the transmit-
26: HF1-MID1 26: HF1-MID1 26: HF1-MID1
ter, and confirm that the output power is 10 W (± 1 W).
In case the power is not within the specified tolerance,
adjust this parameter for 10 W (±1 W) of transmission
power.
5. Select menu item "27: HF1-MIN 27: HF1-MIN." Key the transmit-
27: HF1-MIN 27: HF1-MIN
27: HF1-MIN
ter, and confirm that the output power is 5 W (±1 W).
In case the power is not within the specified tolerance,
adjust this parameter for 5 W (±1 W) of transmission
power.
6. The other RF power adjustment menus, [HF2-
[HF3- ], should be adjusted in the same manner as
HF3- HF3- HF3- HF3- **
shown above for the 7 MHz and 21 MHz bands re-
spectively.
7. Tune the transceiver to the 50 MHz band in the CW
mode.
8. Select menu item "36: 50M-MAX 36: 50M-MAX." Key the transmit-
36: 50M-MAX 36: 50M-MAX
36: 50M-MAX
ter, and adjust this parameter for 100 W (±5 W) of trans-
mission power.
9. Select menu item "37: 50M-MID2 37: 50M-MID2." Key the trans-
37: 50M-MID2 37: 50M-MID2 37: 50M-MID2
mitter, and confirm that the output power is 50 W (±5
W). In case the transmiss322ion power is not within
the specified tolerance, adjust this parameter for 50 W
(±5 W) of transmission power.
10.Select menu item "38: 50M-MID1 38: 50M-MID1." Key the trans-
38: 50M-MID1 38: 50M-MID1
38: 50M-MID1
mitter, and confirm that the output power is 20 W (±
2W). In case the power is not within the specified tol-
erance, adjust this parameter for 20 W (±2 W) of trans-
mission power.
11.Select menu item "39: 50M-MIN 39: 50M-MIN." Key the transmit-
39: 50M-MIN 39: 50M-MIN
39: 50M-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.
12.Tune the transceiver to the 144 MHz band in the CW
mode.
13.Select menu item "40: VHF-MAX 40: VHF-MAX." Key the transmit-
40: VHF-MAX 40: VHF-MAX 40: VHF-MAX
ter, and adjust this parameter for 50 W (±2.5 W) of
transmission power.
Alignment
] and
HF2- HF2- HF2- HF2- **
21