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FT-897 Alignment
Vertex Standard Co., Ltd.
9
parameter for 10W transmission power.
Carrier Level Adjustment
a.
Tune the transceiver to 21MHz band. Connect a 50
Q
dummy load to the antenna connector. Set the
mode on CW. Select the menu item "CW -CAR" and key the transceiver.
b.
Set the parameter at the value of lighting 5 dots of the ALC meter on the LCD.
c.
Connect an oscilloscope to the antenna connector via an appropriate attenuator.
d.
Set the mode on AM. Select the m enu item "AM-CAR". Inject a 1.0mV AF at 1 KHz from an audio
generator into the microphone jack.
e.
Key the transceiver and adjust the parameter for 33% AM modulation on the oscilloscope.
FM
Modulation Adjustment
a.
Tune the transceiver to 144MHz band on FM mode. Connect a FM linear detector to the antenna
connector via an appropriate attenuator. Select the menu item "DEV -W". Inject a 15mV AF at 1 KHz
from an audio generator.
b.
Key the transceiver and adjust the parameter for maximum deviation of 4.5KHz +/- 0.2KHz on the
FM linear detector.
c.
Change the menu item to "DEV-N". Key the transceiver and adjust the parameter for maximum
deviation of 2.25KHz +/- 0.1 KHz on the FM linear detector.
d.
Change the menu item to "M-MTR". Key the transceiver and set the parameter at the value of
lighting 5 dots of the MOD Meter on the LCD.
e.
Change the menu item to "DTMF". Key the transceiver with DTMF signal input and adjust the
parameter for maximum deviation of 2.5KHz +/- 0.3KHz on the FM linear detector.
f.
Change the menu item to "CTCSS". Key the transceiver without microphone input and adjust the
parameter for maximum deviation of 0.7KHz +/- 0.1KHz on the FM linear detector.
g.
Change the menu item to "DCS". Key the transceiver without microphone input and adju st the
parameter for maximum deviation of 0.7KHz +/- 0.1KHz on the FM linear detector.
SSB Carrier Point Adjustment
a.
Tune the transceiver to 21MHz band. Select the menu item "LSB-CP". Set the mode on LSB, inject a
1.0mV AF from an audio generator into the microphone jack.
b.
Lower the AF frequency down to 400Hz and adjust the parameter for 20W output power of the
transceiver.
d.
Change the AF frequency to 2600Hz and confirm that the output power is at least 20W ±2.
e.
The adjustment for the USB carrier point is performed in the same routine as done for LSB by
changing the transmission mode to USB and m enu item to "USB-CP".
