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PJRL250 Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo)
Pag. 29
5.1 POWER SUPPLY ADJUSTMENT
After changing the power supply module and having reconnected all the
connectors, make the following tests and adjustments:
1)
Disconnect CN1 from the appropriate RF power module.
2)
Connect a suitable dummy load (P>300W on 50Ohm) to the amplifier
output.
3)
Switch the amplifier on.
4)
Check the 50V output of the new power supply using the analog meter
and selecting the appropriate reading with the Meter Selector
switch.
Confirm the reading measuring the output voltage with a digital
multimeter connected to pins 1-2 and 3-4 of the power supply; if
needed adjust the value with P1.
5)
Connect a 50 Ohm P>300W power resistor to the male connector CN1
coming from J2 of the power supply.
Select "I" parameter with the Meter Selector (8 Fig.1) switch; you
should read a current of 10A, if not adjust P3 on the power supply
board for the correct reading.
6)
Be sure that P2 is turned completely counter clockwise.
5.2 R.F. POWER AMPLIFIER MODULE ADJUSTMENT
After you have changed the module perform the following operations.
1)
Connect CN1 (coming from the power supply) to the RF module.
2)
Connect the input connector J1 to PJRL250 R.F. Input Connector and
output connector "J2" to input connector "J1" of low pass filter.
3)
See SETUP 2 (Fig.5), connect a dummy load (P>300W at 50Ohm) to the
R.F. Output connector (5 Fig.2) with a through wattmeter (BIRD 43)
in
series.
4)
Connect an driver able to deliver a power of almost 2W-20W
SETUP 2 / FIG. 5
Содержание PJRL250
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