Tuning Procedure; Figure 14 Test Equipment Setup For Preselector Field Tuning - Motorola PDR 3500 Basic Service Manual

From
Signal
Generator

Tuning Procedure

68P81093C75-O
Step 2. Remove the chassis from its case by removing the
Step 3. Remove the two Torx screws from the Receiver
Step 4. Using the torque driver and deep-well socket, loosen
Step 5. De-tune the preselector as follows:
Step 6. Connect the test equipment as shown in Figure 14.
RX
TX
To Dip/Peak
Monitor
(RF Millivoltmeter
or Power Meter)

Figure 14 Test Equipment Setup for Preselector Field Tuning

Step 1. Turn the station power supply ON (to provide the
Step 2. Adjust the signal generator to the frequency calculated
September 27, 2000
eight Phillips screws from the edges of the station's
top panel.
Module front panel and remove the four Phillips
screws. Remove the panel.
the three tension nuts on the adjustment screws.
Turn tuning screws 3 and 4 clockwise until they bottom
out. Be careful not to apply more than 3 in. – lb. of
torque to prevent warping the preselector cover and
housing.
Tension Nut
Tuning Screw
Tuning
Probe
active 50 Ω termination).
on page 39. Set the level to +5 dBm.
Preselector
Assembly
To RX
Connector
on Top Panel
To
Receiver
Board
MAEPF-27040-O
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