R.V.R. Elettronica PTRL-NV/S3, Technical Manual

Page: 51 / 171

R.V.R. ELETTRONICA S.r.l. (BO) Pag. 49
PTRLNV/S3 - Technical and Maintenance Manual
Should the new operating frequency fall within a non-adjacent band the
following procedure should be carried out:
TRANSMITTER
1) Change the EPROM for one containing the desired frequency.
2) After the replacement of the EPROM, set the CPU on the frequency
range relative to the EPROM frequency. When the transmitter switches
on, appears on the display the lightening notice SET 0; now, push
ENTER and verify that the minimum frequency of the EPROM appears
on the display. In case in which appears the lightening notice
SET 1 too, push again ENTER command.
3) Select the new frequency using the UP (11 Fig.1) and DOWN (8 Fig.1)
buttons and confirm it with the ENTER (9 Fig.1) key.
4) Follow the procedure for calibrating or replacing the VCO as
detailed in paragraph "Calibration of the VCO" and paragraph "Main
card replacement" of the PTRL-NV/S3 manual.
5) Follow the procedure for calibrating or replacing the final power
stage as detailed in paragraphs "Calibration of the R.F. power
amplifier" and paragraph "R.F. power amplifier replacement" of the
PTRL-NV/S3 manual.
RECEIVER
1) Change the EPROM for one containing the desired frequency.
2) Replace the Front-end Mixer (if the new frequency requires it) as
detailed in paragraph "Replacement of the front-end mixer" of the
RXRL-NV manual.
3) Replace the VCO (if the new frequency requires it) as detailed in
paragraph "Replacement of the PLL" of the RXRL-NV manual.
4) After the replacement of the EPROM, set the CPU on the frequency
range relative to the EPROM frequency. When the receiver switches
on, appears on the display the lightening notice SET 0; now, push
ENTER and verify that the minimum frequency of the EPROM appears
on the display.
In case in which appears the lightening notice SET 1 too, push again
ENTER command.
5) Select the SIGNAL measurement using the selector and confirmed by
the corresponding green led.
6) Select the new frequency using the UP and DOWN buttons and confirm
it with the ENTER key.