Vertex Standard VXR-9000 Series, Service Manual

Page: 22 / 118

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 dB
μ V, ±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 [ Page Up
]/[
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 [ 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
Sampling
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