Vertex Standard FT-817, Руководство пользователя

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21
Alignment
2. Rotate the main dial to set this parameter four digits
below the value displayed in step 1.
3. After setting this parameter, confirm that all the dots
of the ALC meter have gone out.
4. Select Alignment Menu item "61 ALC-M." Inject a 4.0
mV AF signal at 1 kHz from the audio generator to the
microphone jack (pin 4), and key the transceiver.
5. Press the [
A
] key, and confirm that 5 dots on the ALC
meter scale are present.
Reverse ALC Adjustment
1. Set the mode to CW, and connect the 150-Ohm dummy
load to the antenna connector. Tune the transceiver to
the 1.8 MHz band, and select Alignment Menu item
"62 HF1-RV."
2. Key the transceiver, and set the parameter such that 6
dots of the power meter scale appear on the LCD.
3. The other reverse ALC adjustment menu, designated
[63 HF2-RV], [64 HF3-RV], [65 50M-RV], [66 VHF-RV,
and [67 UHF-RV], should be adjusted in the same man-
ner on the 7 MHz, 21 MHz, 50 MHz, 144 MHz, and 430
MHz bands, respectively. Use the CW mode, and the
precise frequency is not critical.
Carrier Level Adjustment
1. Tune the transceiver to the 21 MHz band. Connect the
50-Ohm dummy load to the antenna connector. Set the
mode to CW. Select Alignment Menu item "68 CW-
CAR," and key the transceiver.
2. Set this parameter such that 5 dots of the ALC meter
scale appear on the LCD.
3. Connect the oscilloscope to the antenna connector via
an appropriate attenuator.
4. Set the mode on AM. Select Alignment Menu item "69
AM-CAR." Inject a 1.0 mV audio signal at 1 kHz from
the audio generator into the microphone jack (pin 4).
5. Key the transceiver, and adjust this parameter for 33%
(AM) modulation on the oscilloscope.
FM Modulation Adjustment
1. Tune the transceiver to the 144 MHz band (FM mode).
Connect the FM linear detector to the antenna connector
via an appropriate attenuator. Select Alignment Menu
item "70 DEV-W." Inject a 15 mV audio signal at 1 kHz
from the audio generator to the microphone jack (pin 4).
2. Key the transceiver, and adjust this parameter for a
maximum deviation of ±4.5 kHz (±0.2 kHz) on the FM
linear detector.
3. Change the menu item to "71 DEV-N." Key the trans-
ceiver, and adjust this parameter for a maximum de-
viation of ±2.25 kHz (±0.1 kHz) on the FM linear detec-
tor.
4. Change the menu item to "72 M-MTR." Key the trans-
ceiver, and set this parameter such that 5 dots of the
MOD meter scale appear on the LCD.
5. Change the menu item to "73 CTCSS." Key the trans-
ceiver without microphone input, and adjust this pa-
rameter for a maximum deviation of ±0.7 kHz (±0.1 kHz)
on the FM linear detector.
6. Change the menu item to "74 DCS." Key the transceiver
without microphone input, and adjust the parameter
for a maximum deviation of ±0.7 kHz (±0.2 kHz) on the
FM linear detector.
SSB Carrier Point Adjustment
1. Tune the transceiver to the 21 MHz band. Select Align-
ment Menu item "75 LSB-CP." Set the mode to LSB, and
inject a 1 mV AF from an audio generator into the mi-
crophone jack (pin 4).
2. Key the transmitter, and vary the audio frequency of
the audio generator to find the frequency at which you
achieve the maximum output power of the transceiver.
Confirm that the output power is at least 2.5W; then
adjust the AF output level of the audio generator for
2.0 W (±0.1 W) output power from the transceiver.
3. Lower the audio frequency down to 400 Hz, and ad-
just this parameter for 0.6 W (±0.1 W) output power
from the transceiver.
4. Change the audio frequency to 2600 Hz, and confirm
that the output power is at least 0.5 W.
5. The adjustment for the USB carrier point is performed
in the same manner as done for LSB, by changing the
transmission mode to USB and the Alignment Menu
item to "76 USB-CP."