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FT-897 Alignment
Vertex Standard Co., Ltd.
1
FT-897 Alignment
Local Oscillator Adjustment
Reference Frequency Adjustment
a.
Connect a frequency counter to TP1032.
b.
Adjust the trimmer capacitor (TC5001) for 67.875000MHz ±5Hz on the frequency counter.
c.
Connect a RF millivoltmeter or an oscilloscope to the J5002 2pin (TP1032) and confirm that the
output level is at least 70mVrms or 200mVp-p.
PLL Adjustment
VCO
VCV Adjustment
a. Connect a DC voltmeter to J2002 6pin (TP1028) and referring to the table below, tune the
transceiver to each frequency listed. Then con firm that the correct voltage is present, or adjust the
listed components for the required voltage.
Tune to :
Adjust / Confirm
For
13.895MHz
Adjust T2001
5.5V ±0.5V
76.000MHz
Confirm
At least 0.8V
32.995MHz
Adjust T2002
5.5V ±0.5V
13.900MHz
Confirm
At least 0.8V
55.995MHz
Adjust T2003
5.5V ±0.1V
88.000MHz
Confirm
At least 0.8V
163.995MHz
Adjust L2010
5.5V ±0.1V
108.000MHz
Confirm
At least 0.8V
469.995MHz
Adjust L2011
5.5V ±0.1V
420.000MHz
Confirm
At least 0.8V
1
st
Local Output Level
a.
Connect a RF millivoltmeter to J2002 11pin and tune the transceiver to 28.000MHz.
b.
Confirm that the RF level is at least +3dBm or 300mVrms.
PLL Unlock
a. Connect a DC voltmeter to J2002 1pin (TP1027).
b. When the reference input is not activated, the voltmeter shows less than 0.5V and
"UNLOCK" is displayed on the LCD.
c. When the reference input is activated, the voltmeter shows at least 3.5V and LCD displays
as it normally should do.
Idling Current Adjustment
Before alignment, set the mode on CW and tune the transceiver to 1.800MHz.
