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FT-897 Alignment
Vertex Standard Co., Ltd.
4
output, 1KHz AF FM modulation of 3.5 KHz deviation.
b.
Adjust T1024, T1026, and T1028 alternately for the best SINAD sensitivity.
c.
Increase the output level of the signal generator up to 12dBu approximately and adjust T1024 and
T1026 alternately for the best SINAD s ensitivity.
Air-Band Reception Adjustment
a.
Connect a DC voltmeter to TP1044.
b.
Tune the transceiver to 128.00MHz on AM mode. Inject a RF signal from a signal generator at
40dBu output, 40% AM modulation of 400 Hz AF.
c.
Adjust T1005 and T1008 for the minimum indication on the DC voltmeter.
VHF Band Alignment
a.
Connect a DC voltmeter to TP1044.
b.
Tune the transceiver to 145.995MHz. Inject a RF signal from a signal generator at 20dBu output.
c.
Adjust T1006, T1009 and T1010 alternately for the minimum indication on the DC voltmeter.
UHF Band Alignment
a.
Connect a DC voltmeter to the TP1044.
b.
Tune the transceiver to 439.995MHz. Inject a RF signal from a signal generator at 20dBu output.
c.
Adjust TC1001 for the minimum indication on the DC voltmeter.
W-FM Reception Adjustment
a.
Connect a SINAD meter to the speaker jack.
b.
Tune the transceiver to 88.00MHz. Inject a RF signal from a signal generator at 30dBu output,
22.5KHz deviation FM modulation of 1 KHz AF.
c.
Adjust TC1005 for the best SINAD sensitivity. Then reduce the output level of the signal generator
and adjust TC1003 again.
Image Rejection Trap Adjustment
a.
Connect an AF millivoltmeter to the speaker jack.
b.
Tune the transceiver to 51.995MHz on CW mode. Inject a RF signal from a signal generator at
68.330MHz, 70dBu output.
c.
Adjust T1014 for the minimum indication on the AF millivoltmeter. Then increase the output level
of the signal generator slightly and adjust T1014 again.
Noise Blanker Adjustment
a.
Connect a DC voltmeter to TP1043. Tune the transceiver to 51.995MHz and inject a RF signal from
a signal generator at 20dBu output.
b.
Activate the noise blanker and adjust T1027 and T1031 for the minimum indication on the DC
voltmeter at TP1043, for the maximum indication at the base of Q1074.
