R.V.R. Elettronica RXRL-NV, Техническое руководство

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RXRL-NV Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo) Pag. 48
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 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 4.7 (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 4.8 (Replacement of the PLL) of the RXRL-NV.
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 new frequency using the UP (14 Fig.1) and DOWN (12 Fig.1)
buttons and confirm it with the ENTER key (13 Fig.1).
6) Select the SIGNAL measurement using the selector (20 Fig.1) and
confirmed by the corresponding green led (8 Fig.1).
7) Calibrate the VCO as detailed in paragraph 5.10 of the RXRL-NV
manual.
8) Calibrate the 6 compensators, situated on the two filters FIL1 and
FIL2 of the Front-end Mixer, for the maximum R.F. signal, checking
against the corresponding reading on the receiver’s meter (maximum
R.F. signal displayable = -47 dBm).