Barracuda Networks SP4 Uživatelský manuál stáhnout pdf (Strana 118)

ENG

118

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LOOP-THROUGH MODE

In the loop-through mode, the output of the stereo generator is directly cabled at the AUX 1 input of RDS encoder. The

RDS output of the encoder will be then connected to the normal composite/Mpx input of the FM exciter.

As noticed, this configuration is NOT recommended, as the composite / MPX is passing through the RDS encoder and

program transmission will be interrupted in the event of RDS encoder failure. This configuration doesn’t need to alter the

encoder factory preset. RDS subcarrier phase will be locked either to external FM stereo MPX signal. Correct

synchronization will cause MPX LED ON in the front panel.

External Synch MUST be enabled from the control panel menu or from the Pc control software

MPX pilot suitable level: minimum 100 mVpp, max 1,9 Vpp

19 kHz Sync tolerance : +/- 5Hz to lock; +/- 15 Hz to unlock

An automatic switchover to internal oscillator in case of absence or l

ow quality of external reference

signal is performed.

The level of the injected signal may be adjusted by means of the trimmer next to the corresponding

BNC connector (no software control is provided for this purpose). This trimmer is factory preset for a

gain of 0 dB (unity gain).

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Barracuda Networks SP4 Uživatelský manuál Strana 118