R.V.R. Elettronica PTRL-NV/2/HP/S3, Техническое руководство

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 47
PTRLNV/2/S3 and PTRL-NV/2/HP/S3 - Technical and Maintenance Manual
Amplifier Stage (and relative receiver's Front-End/Mixer), the following
procedure should be carried out:
TRANSMITTER
1) Select the new frequency with the UP (11 Fig.1) and DOWN (8 Fig.1)
buttons and confirm it with the ENTER (9 Fig.1) key.
RECEIVER
1) Select the new frequency with the UP and DOWN buttons and confirm
it with the ENTER key.
2) Select the SIGNAL measurement using the selector and confirmed by
the corresponding green led.
3) Calibrate thr R.F. Cavity, situated on the recevier, for the maximum
R.F. signal, checking against the corresponding reading on the
receiver's meter (maximum R.F. signal displayable = -47 dBm).
CASE B
Should the new frequency fall outside the range of receiver's R.F. Power
Amplifier Stage (and relative receiver's Front-End/Mixer). it's
necessary that this procedure should anly be carried out by factory, in
that errors can cause serious damage to equipment and will automatically
nullify the warranty.
6.6 TRANSMITTER AUDIO DEVIATION AND DISTORTION FIGURES
To make this measurement, configure the unit according to SETUP D
(Fig.12) and carry out the following procedures:
1) Adjust the signal generator for a signal level of -10 dBm (0dBm for
american versions) at the MONO and STEREO inputs.
2) Configure the modulation analyzer to rear deviation.
3) Check that the deviation reading for the PTRL-NV/2/S3
(and PTRL-NV/2/HP/S3) is 100KHz and if not, adjust trimmer R8
(inside the VCO) to obtain it.
4) Configure the audio analyzer to read distortion (with 50 uS de-
emphasis for european versions and 75 uS for american versions).
SETUP C / FIG. 11