Tx Gain Adjustment; Alc Meter Adjustment - Yaesu FT-897 Manual

2W. In case the transmission power is not within the tolerance, adjust the parameter for 20W ± 2W
transmission power.
h. Select the menu item "VHF-MIN". Key down and confirm that the output power is 5W ±
1W. In case the power is not within the tolerance, adjust the parameter for 5W ±1W
transmission power.
i. Tune the transceiver to 430MHz band on CW mode. Select the menu item "UHF-MAX". Key
down and adjust the parameter for 20W ±1W transmission power.
k. Select the menu item "UHF-MID" Key down and confirm that the output power is 20W ± 0.3W. In
case the transmission power is not within the tolerance, adjust the parameter for 20W ±0.3W
transmission power.

TX Gain Adjustment

a. Select the USB mode. Inject a 1mV audio signal at 1KHz from an AF generator into the
microphone jack.
b. Tune the transceiver to 1.8MHz band and key the transmitter. Select the menu item "HF1TXG"
and adjust the parameter for 50W ±10W transmission power.
c. Other TX gain adjustment menu, such as [HF2TXG], [ HF3TXG] and [50MTXG] should be
adjusted as the same routine on 7MHz, 21MHz and 50MHz band respectively.
d. Tune the transceiver to 144MHz band and key the transmitter. Select the menu item "VHFTXG"
and adjust the parameter for 25W ±5W transmission power.
e. Tune the transceiver to 430MHz band and key the transmitter. Select the menu item "UHFTXG"
and adjust the parameter for 10W ±2W transmission power.

ALC Meter Adjustment

a. Tune the transceiver to 21MHz band on USB. Select the menu item "ALC-1". Key the transceiver
without microphone input and press [A] key. Then a value which microprocessor computes is
displayed on the LCD.
b. Set the parameter taken four away from the displayed value.
c. After setting the parameter, confirm that all the dots of the ALC m eter go out.
d. Select the menu item "ALC-M". Inject a 4.0mV AF signal at 1KHz from an audio generator and key
the transceiver.
e. Press [A] key and confirm that 5 dots of ALC meter light on the LCD.
Reverse ALC Adjustment
a. Set the mode on CW, connect a 150
b. Key the transceiver to 1.8MHz band and select the menu item "HF1 -RV" and adjust the parameter
for 50W transmission power.
c. Other reverse ALC adjustment menu, such as [HF2-RV], [HF3-RV] and [50M-RV] should be
adjusted as the same routine on 7MHz, 21MHz and 50MHz band respectively.
d. Key the transceiver to 144MHz band and select the menu item "VHF-RV" and adjust the
parameter for 25W transmission power.
e. Key the transceiver to 430MHz band and select the menu item "UHF-RV" and adjust the
dummy load to the antenna connector.
Q
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FT-897 Alignment
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