R.V.R. Elettronica PJRL250, Техническое руководство

Страница: 25 / 69

PJRL250 Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo) Pag. 25
In the same way check FWD and REF powers are 0.
6) Connect to the R.F. INPUT (4 Fig.2) a suitable driver able to deliver
a power of between 2W and 20W.
7) Connect the Alarms/Interlock Connector (10 Fig.2) to the BNC on the
rear panel of the exciter (Remote Control).
8) Switch on the exciter with the output power set to the minimum value.
Tune the exciter to a middle band frequency e.g. 215Mhz, wait for
the PLL to lock then gradually raise the output power of the exciter.
Verify the increase in the output power the of PJRL250 and
simultaneously monitor the current "I"; they should increase propor-
tionally and assume about the some final value.
Continue this operation until a 250W output value is obtained.
At this condition the working parameters are:
V=about 50V
I=about 10A
9) Check the reading of the internal wattmeter with that of the external
one (a discrepancy of about 10% is tolerable).
10) With the amplifier at full power, push and keep pushed the RESET
switch (3 Fig.1), and check that output power, "V" and "I", go to
0 and that the output power of the exciter goes to 0 too.
Release the switch and all the previous parameters will go back
to their original values.
11) Increase the drive power until the Over Drive led lights (7 Fig.1).
At this point, the lock condition should disable the amplifier and
exciter for about 10 sec, after which the amplifier will try to
restart. If the drive power setting has not changed, another lock
condition will occur, otherwise the amplifier will restart n o r -
mally.
In the case of another lock condition, the protection circuit will
make 4 attempts at a restart. Should this fail the amplifier will
wait for a longer periods and make 4 more attempts. Should this not be
successful, the amplifier will remain disabled indefinitely.
SECTION 4
MAINTENANCE