R.V.R. Elettronica PTRL-NV/S3, Техническое руководство

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 40
PTRLNV/S3 - Technical and Maintenance Manual
5.5 CALIBRATION OF THE ANAMETER CARD
After replacement of the cards it is necessary to calibrate all the
functions that they perform:
1) Connect a bypass wattmeter between the R.F. output and a 50 Ohm dummy
load (show SETUP1 / Fig.4)
2) Adjust the output power for 2 W (5 or 10 W).
3) For each of the selector (13 Fig.1) positions adjust the
corresponding trimmer for the values listed below:
READING VALUE FSD TRIMMER NOTE
+15V 15V 30V R18
+12V 12V 30V R17
+5V 5V 30V R22
PWR FWD 2W 2.5W R21 0
EXT 24V (OPT) 24V 30V R16 1
VPA VARIABILE 30V R15 2
IPA VARIABILE 6A R19 3
AFC VARIABILE 30V R20 4
NOTE:
0) Full scale deflection (FSD) is 10W for the 5 and 10W versions.
1) The reading is OV if not fitted.
2) Use a multimeter to measure the voltage between Vp of Q1 (MJ3001
of the power supply card) and ground and check for the same reading
on the internal meter.
3) For the IPA reading, use a 10 Ohm 5W resistor between Vp of Q1 (MJ3001
on the power supply card) and ground in series with an ammeter and
check for the same reading on the internal meter.
4) Use a multimeter to read the AFC voltage (3-11V) on pin 2 of U7 on
the Main card.
5.6 CALIBRATION OF THE CPU
After replacement, check that the displays function and that
operating frequencies can be programmed using the UP (11 Fig.1), DOWN
(8 Fig.1) and ENTER (9 Fig.1) buttons.
Check correct operation of the DB9 serial port (if fitted). No other
checks are required.