Vertex Standard VX-6000V, Руководство по обслуживанию

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5-4
Alignment
r
Key the transmitter and adjust “
MAX Dev
(
Nar-
row
)“ for maxi-mum deviation of 2.1 kHz ± 0.1
kHz as indicated on the deviation meter.
CTCSS Modulation Level
r
Select the “low” power output level.
r
Select the band center frequency channel (CH7),
with 151.4 Hz CTCSS encode, and reduce the AF
generator injection to zero.
r
Key the transmitter and adjust “
CTCSS Dev
(
wide
)“
for CTCSS deviation of 0.75 kHz ± 0.05 kHz as
indicated on the deviation meter.
r
Select the band center frequency channel (CH9),
with 151.4 Hz CTCSS encode, and reduce the AF
generator injection to zero.
r
Key the transmitter and adjust “
CTCSS Dev
(
Nar-
row
)“ for CTCSS deviation of ±0.36 kHz (± 0.05
kHz) as indicated on the deviation meter.
DCS Modulation Level
r
Select the “low” power output level.
r
Select the band center frequency channel (CH8),
with 023 DCS code, and reduce the AF generator
injection to zero.
r
Key the transmitter and adjust “
DCS Dev
(
wide
)“
for DCS deviation of ±0.75 kHz (± 0.05 kHz) as
indicated on the deviation meter.
r
Select the band center frequency channel (CH10),
with 023 DCS code, and reduce the AF generator
injection to zero.
r
Key the transmitter and adjust “
DCS Dev
(
Nar-
row
)“ for CTCSS deviation of ±0.36 kHz (± 0.05
kHz) as indicated on the deviation meter.
Receiver
The sensitivity parameters can be adjusted from
the computer by utilizing the Alignment Software.
Refer to the onboard help of the Alignment Software
Manual for details.
r
Set up the test equipment as shown for receiver
alignment, and install the audio test adapter.
r
With the transceiver set to the band center fre-
quency channel (CH2), and with the RF signal
generator tuned to the same frequency, set the
generator for ±3.0 kHz deviation with 1 kHz tone
modulation, and set the output level for –5.0 dBµ
at the antenna jack.
r
Adjust “
Rx TUNE
“ the receiver front-end tuning
for optimum SINAD, reducing signal generator
output level as necessary for proper meter de-
flection.
r
After the previous step, the final signal genera-
tor level should be less than –5.0 dBµ for 12dB
SINAD.
r
With the transceiver set to the band center fre-
quency channel (CH5), and with the RF signal
generator tuned to the same frequency, set the
generator for ±1.5 kHz deviation with 1 kHz tone
modulation, and set the output level for –4.0 dBµ
at the antenna jack.
r
After the previous step, and confirm the final sig-
nal generator level should be less than –4.0 dBµ
for 12dB SINAD.
50-Ohm
Dummy Load
RF Signal
Generator
Power Supply
13.8V DC
AF Generator
SINAD
Meter
AF Test
Adapter
AC Volt
Meter
Inline
Wattmeter
Deviation
Meter
RF Sampling
Coupler
CT-71
Connection
Cable
Frequency
Counter
Transceiver
13.6