Maximum Deviation; Sub-Audio (Ctcss) Deviation - Vertex Standard VXR-9000 Service Manual

Alignment

Maximum Deviation

Setup the test equipment as shown below.
Sampling
Coupler
50-ohm
Dummy Load
TX ANT
Deviation
Meter
Set the AF Signal Generator output to 35 mVrms at 1
kHz.
Open the "Alignment" window, then click the left
mouse button on the "Deviation" tab to move to the
"Deviation" screen.
Click the left mouse button on the "Wide" box on the
"Low Band Edge Frequency" area of the "MAX De-
viation (Audio)" field (highlighted in "pink").
Click the left mouse button on the "PTT On" button to
actitvate the transmitter (the "PTT On" label is changed
to "PTT Off").
Press the [ Page Up ] / [ Page Down ] key so that the De-
viation Meter reading is 4.2 kHz ±0.2 kHz.

Sub-Audio (CTCSS) Deviation

Setup the test equipment as shown below.
50-ohm
Dummy Load
Deviation
Meter
Open the "Alignment" window, then click the left
mouse button on the "Deviation" tab to move to the
"Deviation" screen.
Click the left mouse button on the "CTCSS W" box on
the "Low Band Edge Frequency" area of the "MAX
Deviation (CTCSS/DCS)" field (highlighted in "pink").
Click the left mouse button on the "PTT On" button to
actitvate the transmitter (the "PTT On" label is changed
to "PTT Off").
Press the [ Page Up ] / [ Page Down ] key so that the De-
viation Meter reading is 0.75 kHz ±0.05 kHz.
Click the left mouse button on the "PTT Off" button
to disable the transmitter (the "PTT Off" label is re-
turned to "PTT On").
G-4
VXR-9000
MIC
TUNING I/F BOX AF Signal
( FRB-4 )
Generator
Computer
( CE60 )
Sampling
Coupler
VXR-9000
TX ANT
MIC
Computer
( CE60 )
Click the left mouse button on the "PTT Off" button
to disable the transmitter (the "PTT Off" label is re-
turned to "PTT On").
Repeat the above steps at the "Narrow" box on the
"Low Band Edge Frequency" area of the "MAX De-
viation (Audio)" field (highlighted in "pink") so that
the Deviation Meter reading is 2.1 kHz ±0.1 kHz.
Repeat the above steps at the eight points (box: fre-
quencies).
Repeat the above steps at the "CTCSS N" box on the
"Low Band Edge Frequency" area of the "MAX De-
viation (CTCSS/DCS)" field (highlighted in "pink") so
that the Deviation Meter reading is 0.38 kHz ±0.02 kHz.
Repeat the above steps at the eight points (box: fre-
quencies).