Yaesu FT-897 Technical Supplement page 14

Alignment
RX Adjustment
The PA Unit must be connected during RX adjustments.
The signal generator should not be connected to J1003
directly because DC voltage is present there.
RX IF Adjustment
Connect the signal generator to the antenna connector,
and the SINAD meter to the speaker jack.
SSB IF Adjustment
Tune the transceiver to 51.995 MHz. Inject an RF sig-
nal from a signal generator at 0 dBµ output.
Adjust T1018, T1019, T1024, T1026, T1028,
T1030, T1035, T1036, T1037, T1034 and T1029
alternately for maximum indication on the DC volt-
meter. Several passes may be necessary, as the adjust-
ments inter-react to some degree.
FM IF Adjustment
Tune the transceiver to 51.995 MHz. Inject an RF sig-
nal from a signal generator at +5 dBµ output, with 1
kHz AF FM modulation at ±3.5 kHz deviation.
Adjust T1024, T1026, and T1028 alternately for
maximum level on the S-meter.
Air-Band Reception Adjustment
Connect the DC voltmeter to TP1044.
Tune the transceiver to 128.00 MHz in the AM mode.
Inject an RF signal from the signal generator at 20 dBµ
output, with 30% AM modulation at 400 Hz audio fre-
quency.
Adjust T1005 and T1008 for minimum indication on
the DC voltmeter.
VHF Band Alignment
Connect the DC voltmeter to TP1044.
Tune the transceiver to 145.995 MHz in the CW mode.
Inject an RF signal from a signal generator at 20 dBµ
output.
Adjust T1006, T1009 and T1010 alternately for mini-
mum indication on the DC voltmeter.
14
UHF Band Alignment
Connect the DC voltmeter to TP1044.
Tune the transceiver to 439.995 MHz in the CW mode.
Inject a RF signal from the signal generator at 20 dBµ
output.
Adjust TC1001 for minimum indication on the DC
voltmeter.
W-FM Reception Adjustment
Connect the SINAD meter to the speaker jack.
Tune the transceiver to 88.00 MHz. Inject a RF signal
from the signal generator at 30dBu output, with ±22.5
kHz deviation FM modulation of a 1 kHz audio signal.
Adjust TC1005 for the best SINAD sensitivity. Then
reduce the output level of the signal generator to where
the signal just begins to sound slightly "noisy," and
adjust TC1005 again for best SINAD.
Image Rejection Trap Adjustment
Connect the AF millivoltmeter to the speaker jack.
Tune the transceiver to 51.995 MHz in the FM mode.
Inject an RF signal from the signal generator at 68.330
MHz, with 70 dBµ output.
Adjust T1004 for minimum indication on the AF
millivoltmeter. Then increase the output level of the
signal generator slightly and adjust T1004 again, so
as to ensure maximum notching of the image.
Noise Blanker Adjustment
Connect the DC voltmeter to TP1043. Tune the trans-
ceiver to 51.995 MHz and inject an RF signal from the
signal generator at 20 dBµ output.
Activate the noise blanker, and adjust T1027 and
T1031 for minimum indication on the DC voltmeter
connected to TP1043.