VXR-9000 UHF Service Manual
Alignment
G-6
Repeat Sensitivity
Setup the test equipment as shown below.
Open the “Alignment” window, then click the left
mouse button on the “Repeat” tab to move to the “Re-
peat” screen.
Set the RF Signal Generator output to the “Repeat RX
Frequency,” at a level of +40 dBμV, ±3.0 kHz deviation
with a 1 kHz audio tone.
Click the left mouse button on the “Repeat Sensitiv-
ity” box.
Click the left mouse button on the “Repeat Sens. Enb”
button to actitvate the transmitter (the “Repeat Sens.
Enb” label is changed to “Repeat TX Off”).
Press the
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]
/
[
Page Down
]
key so that the De-
viation Meter reading is 3.0 kHz ±0.2 kHz.
Click the left mouse button on the “Repeat TX Off”
button to disable the transmitter (the “Repeat TX Off”
label is returned to “Repeat Sens. Enb”).
TX Power Down Detect
Setup the test equipment as shown below.
Open the “Alignment” window, then click the left
mouse button on the “TX PD Det.” tab to move to the
“TX PD Det.” screen.
Click the left mouse button on the “Adjust” box on the
“Low Band Edge Frequency” area of the “Tx Power
Low Temporary ADJ” field (highlighted in “pink”).
Click the left mouse button on the “TX PD Det. Enb”
button to actitvate the transmitter (the “TX PD Det.
Enb” label is changed to “PTT Off”).
Press the
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Page Up
]
/
[
Page Down
]
key so that the
Power Meter reading is 5 W.
Click the left mouse button on the “READ” button to
save the “TX Power Down Detect” data.
Click the left mouse button on the “PTT Off” button
to disable the transmitter (the “PTT Off” label is re-
turned to “TX PD Det. Enb”).
Repeat the above steps at the four points (box: frequen-
cies).
50-ohm
Dummy Load
RF Signal
Generator
Computer
(
CE60
)
Deviation
Meter
VXR-9000
FRB-6
MIC
TX ANT
RX ANT
Samplin
Coupler
FIF-10A
or
FIF-12
50-ohm
Dummy Load
Inline
Wattmeter
Computer
(
CE60
)
VXR-9000
FRB-6
MIC
USB Port
TX ANT
FIF-10A
or
FIF-12
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