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

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 44
PTRLNV/S3 - Technical and Maintenance Manual
2) Switch on the tranmitter and wait until it has locked to its
operating frequency and the UNLOCK light goes out.
3) Connect through a wattmeter with sample a frequency meter and a dummy
load, rated at 15W continuous, to the R.F. output situated on the
rear panel of the transmitter.
4) Use the meter selector to select direct power measurement, FWD.
Check that maximum output power (2W, 5W or 10W depending on the
version) can be attained by turning the PWR ADJ control to its limit.
5) Using the frequency meter, check the output frequency of the
transmitter and adjust as necessary with capacitors C68 and C69
situated on the Main card.
6) Connect the two units (TX and RX) as shown in SETUP A2 (Fig.8).
SETUP A2 / Fig.8
7) Adjust the variable attenuator for a value dependent from the
transmitter's output power (Table E).
8) Connect the counter to the IF 10.7 MHz output and check that the
frequency corresponds to this value, adjusting as necessary with
capacitors C27 and C28 situated on the Synthetizer card for a
frequency of 10.700 MHz ±2 KHz.
In this way, if the 10,7 MHz conversion is corrected, it means that
the output frequency of the Front-End Mixer before the 70 MHz
conversion has the same value of the output frequency of the
transmitter.