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

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 42
PTRLNV/S3 - Technical and Maintenance Manual
SETUP 3 / Fig.6
5) Connect to rear FM-MPX output of the F.A.M. a stereo measurement
decoder.
6) Switch on the PTRL-NV/S3 and wait for the PLL to lock.
7) Set the output level of the signal generator to 0 dBm (2.2 V
PP
or
0.775 V
RMS
) and 400 Hz.
8) Select with the switch (13 Fig.1) the R(MONO) reading and if needed
adjust P8 on the coder board for a 0 dB level.
8A) Repeat the same adjustment selecting L(MPX) adjusting P7.
9) Check with F.A.M. set in FM PK+ mode and with 30Hz-200KHz filter
inserted that the deviation is 75 KHz; if necessary adjust R45 on
the main card to obtain this value.
9A) Disconnect the audio signals on both channels and leave the PILOT
TONE inserted; verify that a deviation of 6.5 to 7.5 KHz is present.
This value can be adjusted with P6 on the coder board.
10) Disconnect the audio signal from one channel and verify that the
output level of the audio generator is 0 dB.
On the stereo measure decoder, you should read a separation of more than
50 dB at 400 Hz.
Take the reading on the other channel.
If the separation between the two channels differs more than 3 dB, you
can balance it adjusting P4 on the coder board.