The Procedure; Vco Alignment; Transmitter Power Adjustment - Philips PRM80 Series User Manual

4.5

THE PROCEDURE

4.5.1 VCO Alignment

4.5.1.1 VHF RECEIVE VCO
Step Result Result
No Measured by Measured at
1
DVM, dc
2 TP402
volt, range
DVM, dc
3 TP402
volt. range
4
4.5.1.2 VHF TRANSMIT VCO
Step Result Result
No Measured by Measured at
1
2
3 DVM, dc
TP402
volt. range.
4
DVM, do
5 TP402
volt. range
6

4.5.2 Transmitter Power Adjustment

Step Result Result
No Measured by Measured at
1
2
3 Power Meter Antenna
socket
Adjust Result
Switch on power
Select ch. 3..
L407 15.0 +10.2V
Select channel 1 3.OV to 5.OV
Disconnect DVM.
Adjust Result
Switch on power.
Select ch. 3.
Activate PTT.
L445 15.0 -/+ 0.2V
Disable PTT
Select ch. 1
3.0 to 5.0V
and activate PTT
Disable PTT
Disconnect DVM
Adjust Result
Switch on power.
Select ch. 2.
Activate PTT
R581 25.0 -/+ 1 watt
Notes
Highest freq.
channel.
Lowest freq.
channel.
Notes
Highest freq.
channel
Lowest freq. ch.
Notes
Mid freq channel for
high power
Section 4 Page 4