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User Manual
Rev. 1.0- 29/11/05
PTRL NV/3 & RXRL NV/3
reasonably expected. Set mixer "MASTER" volume so as to achieve this condition.
Ensure that the transmitter internal limiter does not kick in, as this would cause a
more or less appreciable distortion level.
If the limiter is set to slightly more than 75 kHz, it will kick in right above the 0dB level
and modulation readings on the transmitter and receiver displays may not be much
higher.
Factory setting dictated by law requirements for Italy is 80kHz (+0.5dB).
5.4.7 Pilot tone control in stereo transmission
If the internal stereo coder is fitted, stereo pilot tone level cannot be modified externally;
usually, it is preset internally for 9-10% modulation, (-21÷-20dB) which corresponds
to specified standard 7÷7.5 kHz deviation.
If the stereo modulation signal is generated externally by a separate stereo coder,
pilot tone may be measured when audio modulation and any other auxiliary signals
are absent as follows:
1)
Disconnect all signals from the external stereo coder input and all RDS or SCA
signals.
2)
Select "MPX" level on the radio link transmitter display and observe pilot tone
(it should be the only signal left). As mentioned earlier, standard level is 9-10% (-21÷-
20dB) and may be set accordingly at the external stereo coder as required.
3)
Reconnect the signals you had disconnected previously.
5.4.8 Transmission at low power levels
The radio link transmitter cannot be programmed for output power levels below 0.5
Watt.
5.4.9 Radio link RX connection to next transmitter
Basically, the only connection between the two units is the receiver MPX output
connection to the matching input of the next transmitter, which must be set to "External
MPX" operation mode. Do not use the decoded "Mono" or "Stereo" outputs. No
additional stereo coder is needed for stereo signal transmission; the coder available
at the source station or at the radio link transmitter is sufficient.
Set the receiver output level and the input level of the next transmitter to obtain correct
deviation.
Summary of Contents for PTRL NV/3
Page 1: ...PTRL NV 3 RXRL NV 3 User Manual Volume 1 Manufactured by Italy...
Page 4: ...PTRL NV 3 RXRL NV 3 ii User Manual Rev 1 0 29 11 05 This page was intentionally left blank...
Page 8: ...4 52 User Manual Rev 1 0 29 11 05 PTRL NV 3 RXRL NV 3 This page was intentionally left blank...
Page 55: ...51 52 User Manual Rev 1 0 29 11 05 PTRL NV 3 RXRL NV 3 10 Ensemble View 10 1 PTRL NV 3...
Page 56: ...52 52 User Manual Rev 1 0 29 11 05 PTRL NV 3 RXRL NV 3 10 2 RXRL NV 3...