7.1.3 Synchronisation
The V3 transmitter includes support for synchronizing with either a 10MHz, or a 1pps
external timing signal, for use in a Single Frequency Network. The ‘Synchronisation’ sub
menu contains the following items:
10MHz ref: Internal/External
Determines whether to use the transmitter’s internal 10MHz ref, or to
accept an external reference from, for example, a GPS receiver.
Internal 10MHz trim: Allows the internal 10MHz ref to be trimmed +/- 10ppm.
1PPS synch: Internal/External
Determines whether to synch to an external 1pps reference.
Audio Delay: Allows the audio to be delayed by up to 20mS in 1uS steps, to
synchronise audio with other transmitters on the SFN.
Pilot Phase: 0-359 degrees, to allow the stereo pilot to be synchronised with that
of other transmitters in the SFN.
7.2 Audio Settings
The Audio Settings menu contains the following parameters:
Audio Input: Analog/Digital/Tuner.
Analog refers to the left and right XLR connectors, Digital refers to
the AES/EBU digital RJ45 connector, and Tuner refers to the
optional internal tuner card, if the transmitter is configured as a
translator (or ‘rebroadcaster’).
If the source is MPX over AES then select Digital; in this case the
digital audio connector is reconfigured automatically to receive
MPX over AES.
D-A Failover: Off / On. [to be added in a firmware update]
When enabled (and when Input Source is set to Digital), the unit
looks for an input at the digital input connector; if a viable AES-EBU
signal is not present, it will switch to the analog XLR inputs.
This feature could, of course, be used to provide a backup audio
source to the V3 transmitter.
Analog Ref Level: Set to the reference level of your facility, i.e. its nominal operating
level. So if your mixing desk, for example, runs at around +4dBm, set
this to +4.
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