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FT-897 Alignment
Vertex Standard Co., Ltd.
3
b.
Key the transmitter by FM mode and adjust T1014 for the maximum indication on the RF
millivoltmeter.
c.
Connect a frequency counter to TP1008.
d.
Key the transmitter on FM m ode without microphone input. Adjust L1049 for 68.3300MHz
±100Hz.
Carrier Balance Adjustment
a.
Terminate J1002 by a 50ohm dummy load and connect a spectrum analyzer or a RF
millivoltmeter.
b.
Key the transmitter on USB mode in 14MHz band without microphone input. Adjust VR1005 for
the maximum carrier suppression on the spectrum analyzer or for the minimum indication on the RF
millivoltmeter.
VHF TX BPF Adjustment
a.
Set the frequency at 145.995MHz. Connect RF millivoltmeter to J1002 terminated by a 50ohm
dummy load.
b.
Key the transceiver on FM mode and adjust T1013, T1012, and T1011 alternately for the minimum
indication on RF millivoltmeter.
UHF TX BPF Adjustment
a.
Set the frequency at 439.995MHz. Connect a RF millivoltmeter to J1002 terminated by a 50ohm
dummy load.
b.
Key the transceiver on FM mode and adjust TC1004, TC1003 and TC1002 alternately for the
minimum indication on RF millivoltmeter.
RX Adjustment
PA Unit must be connected in RX adjustment. Signal Generator should not be connected to J1003
directly because DC voltage comes on there.
RX IF Adjustment
Connect a signal generator to the antenna connector and a SINAD m eter to the speaker jack.
SSB IF Adjustment
a.
Connect a DC voltmeter to TP1063.
b.
Tune the transceiver to 51.995MHz. Inject a RF signal from a signal generator at 40dBu output.
c.
Adjust T1024, T102, T1028, T1030, T1035, T1036, T1037, T1034 and T1029 alternately for the
minimum indication on the DC voltmeter.
FM IF Adjustment
a. Tune the transceiver to 51.995MHz. Inject a RF signal from a signal generator at 10dBu
