R.V.R. Elettronica PJRL250, Техническое руководство

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PJRL250 Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo) Pag. 30
SETUP 3 / FIG. 6
(adjustable) to the R.F. Input (4 Fig.2).
5) Connect the Alarms/Interlock connector (10 Fig.2) to the
appropriate connector on the exciter.
6) Set the output power of the exciter to its minimum value.
7) Switch on the PJRL250 and the exciter and wait for the PLL to lock.
8) Now slowly increase the drive checking that the output power rises
progressively, with an increase of "I" current.
NOTE: with P
out
=250W we have 10W < P
in
< 12W and
9.5A < "I" <10A
Some differences in the currents drawn are related to the different gains of
the Mosfet devices (BLF 378) and must be compensated with the trimmers R20
placed on each power amplifier board.
5.3 L.P. FILTER ADJUSTMENT
No adjustments are requested inside the L.P.F. Module because it’s a
factory adjusted device. In case of replacement of a unit, perform the following
operations:
1) Reconnect all the modules and turn the trimmer TR1 on the L.P.F.
completely clockwise.
2) Connect a through wattmeter and a dummy load to the R.F. Output
(see SETUP 3/Fig.6).
3) Connect an driver able to deliver a power of 2-20W to the RF INPUT.
4) Connect one of the two connectors Alarms/Interlock (10 Fig.2) and
the appropriate connector on the exciter.
6) Switch on the amplifier and the exciter PJRL250 and exciter and wait
for the PLL to lock.