R.V.R. Electronica PTRL, Руководство пользователя

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PTRL & RXRL LCD
42 / 44 User Manual Rev. 1.2 - 31/01/05
NOTE: The partial opening of the cover is necessary in order to avoid that the operator
can come in contact with potentially harmful parts for the presence of high-voltage
current.
2 - In case the holes are present on the cover:
On the more recent models the holes are present directly on the cover. This allows
to carry out the regulation avoiding the opening of the cover, proceed with the
operations described in the point 5).
5
a
) Switch on the receiver and wait until it has locked to its operating frequency and
the LOCK light goes on. In order to check or to modify that the working frequency
is the same as that one of the transmitter go to the Set menu (see chap. 6.4.2).
6
a
) Connect the oscilloscope to the IF 10,7MHz output (chap. 7.5 [12]) and verify to
obtain the maximum possible level, regulating through the compensators situates
on the front-end card.
The calibration of the front-end compensators will be carried out so as obtain the
maximum indication pay attention to maintain the input signal level, adjustable by
the attenuator, under the saturation threshold of the indicator (full scale mark).
Eventually to reduce ulteriorly the input level through the attenuator, or reducing
the power of the transmitter optimizing ulteriorly the calibration of the compensators.
7
a
) In the case it had been necessary traslate the cover, once completed the regulation
replace the cover in its initial condition, with feeding disabled or not connected,
and fix it through the screws.
In alternative, it is possible to align the following bridge also in way.
1
b
) Connect the equipment as shown below:
2
b
) Inject, through the signal generator connected to RF, a signal to -10 dBm, with
same frequency as that working frequency of the receiver.