Yaesu FT-817 -, Technical Supplement

Page: 21 / 111

21
Alignment
Software Menu Alignment
For all the following alignment procedures, the antenna
connector should be connected to a dummy load and
wattmeter in all procedures requiring transmission, and
the signal generator should be connected when receiver
alignment is involved. General alignment conditions are
as follows, unless otherwise noted.
AF-gain knob : Center
RF-gain knob : Fully clockwise
SQL : Fully counterclockwise
ATT / IPO / CTCSS / DCS : Off
Output power : High
AGC : Auto
Break-in : On CW Keyer : Off
VOX : Off
Entering the Alignment Mode
To enter the Alignment Mode, press and hold in the [ ],
[ ], and [ ] keys simultaneously; while holding them in,
turn on the transceiver. Once the transceiver comes on,
you may release the three keys. Now press and hold in
the [ ] key for ½ second to activate the Menu, which will
be observed to contain a large number of selections not
normally available during regular Menu operation.
In the alignment procedures to follow, each alignment item
is selected by rotating the
knob, while adjustment of
the selected alignment parameter is accomplished by ro-
tating the main dial.. Press the [ ] key to "set" certain des-
ignated parameters where a signal reading is made by
the microprocessor (for automatic setting of the param-
eter).
To store the alignment parameters after all items have been
adjusted, press the [ ] key for at least ½ second; this will cause
the transceiver to save all settings and exit the Menu mode.
RF Gain Adjustment
1. Tune the transceiver to 1.909 MHz (CW mode). Select
"01 HF1RXG" in the Alignment Menu by rotating the
SEL knob. Now inject an RF signal from the signal gen-
erator at 1.909 MHz at about 32dBµ output, and peak
the S-meter reading on the incoming signal by rotating
the main dial. When the peak is found, reduce the sig-
nal generator level to 12 dBµ.
2. Set the parameter "01 HF1RXG," such that the first dot
of the S-meter (S1) on the LCD is illuminated, by rotat-
ing the main dial. Rotating the main dial adjusts the
receiver's IF Gain around 1.9 MHz.
3. The remaining five RF gain adjustment points should
be aligned as shown in steps (1) and (2) above. The
output levels of the signal generator (for one "dot" of
S-meter deflection) at each frequency are shown be-
low.
SSB S-Meter Adjustment
1. Tune the transceiver to 21.105 MHz on CW mode. In-
ject an RF signal from the signal generator at a level of
39dBµ, and peak the S-meter deflection on the incom-
ing signal.
2. Set the parameter "07 SSB-S9" so that exactly 6 dots of
the S-meter (S9) appear on the LCD by rotating the main
dial.
3. Now inject a signal on the same frequency at a level of
86dBµ.
4. Set the Alignment Menu parameter "08 SSB-FS" such
that all the dots of the S-meter on the LCD appear by
rotating the main dial.
FM S-Meter Adjustment
1. Tune the transceiver to 145.940 MHz (FM mode). Inject
an RF signal from the signal generator at a level of -3
dBµ, with ±3.5 kHz deviation of 1 kHz audio tone.
2. Select Alignment Menu item "09 FM-S1," and press the
[ ] key to set this parameter.
3. Increase the output level of the signal generator up to
22dBµ. Select Alignment Menu item "10 FM-FS," and
press the [ ] key to set this parameter.
FM Center Meter Adjustment
1. Tune the transceiver to 145.937 MHz (FM mode). Inject
an RF signal from the signal generator at a level of
10dBµ, with ±3.5 kHz deviation of a 1 kHz audio tone.
2. Set the frequency of the signal generator to 145.934
MHz (3 kHz below the receiving frequency of the trans-
Frequency Select Menu # Output Level of SG
1.909 MHz 01 HF1RXG 15 dB
7.010 MHz 02 HF2RXG 15 dB
21.105 MHz 03 HF3RXG 12 dB
51.050 MHz 04 50MRXG 3 dB
145.940 MHz 05 VHFRXG 3 dB
440.000 MHz 06 UHFRXG 3 dB
µ
µ
µ
µ
µ
µ