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

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 43
PTRLNV/S3 - Technical and Maintenance Manual
SECTION 6
ALIGNMENT OF THE RADIO LINK
6.1 INTRODUCTION
This chapter details the alignment procedure for the PTRL-NV/
S3 transmitter and the RXRL-NV receiver.
6.2 FREQUENCY ALIGNMENT
The operating frequency of the complete radio link (TX + RX) is
set using a frequency meter to measure the frequency output by the
transmitter and the frequency after the second conversion of the
receiver.
It is recommended to align both units (TX and RX) at the same time and
with the same frequency meter, preferably one of high precision (eg. ±
0.2 ppm). A difference greater then 2 KHz between the transmitter's center
frequency and that of the receiver (measured at the intermediate
frequency of 10.7 MHz) will result in degradation of audio quality and
stereo separation.
To perform this alignment, carry out the following procedure (SETUP A1
and A2):
1) Connect the transmitter as shown in SETUP A1 (Fig.7).
SETUP A1 / Fig.7