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iPump 6420 User’s Manual
www.wegener.com 800070-01 Rev B Chapter 3, Page 72
Audio Settings: Muting, Stereo Routing & Attenuation
The two main Audio Decoders (Ports), #1 and #2, feature both digital and analog audio
outputs. The auxiliary Audio Decoder, #3, only features an analog audio output. Any of those
three sets of outputs may be muted, as an entire signal or by stereo component (Left or Right).
After this, the audio signals may then also have their stereo components re-routed. The current
routes, as of this writing, are 1) to pass the Left and Right channels to the output, as decoded; 2)
to reverse them, Left for Right; 3) to put Left on both as a mono; or 4) put Right on both as a
mono. Following this, the audio passed to the AES3 digital audio outputs gets no further
processing. But the analog outputs for each of the three Decoders (Ports) may also be
programmed for a fixed attenuation. This will reduce the audio output, at clip level, from either
the factory-set +18 or +24 dBm levels,* in 1 dB steps.
* Levels set by jumpers, not programmable!
Note that all the processing described in this subsection would apply to both the audio
output decoded from live satellite audio as well as file-based audio, either as used in inserts or as
permanent “virtual channels” (see Section 3.4).
The user controls, for each Audio Decoder (Port) are:
1. Mute (Off, L, or R, or both)
2. Stereo route (Normal stereo, reverse stereo, L to both, R to both)
3. Analog attenuation (0 to 20 dB, in 1 dB steps, only local control)
3.2.3. Delivery of Relay closures
The iPump6420 features two banks each of 16 form A relays, each of which are assigned to,
or “associated with”, one of the two main audio Decoders (Ports). These relays are generally
used to deliver cueing closures to local affiliates radio stations, signaling the precise time point
where local spots may be inserted into the audio feed by downstream ad insertion gear. So that
the i6420 may support two different local affiliate missions, such as two different radio stations,
one audio and a bank of relays, along with an RBDS signal (see next), may be directed to each.
To properly enforce this, it is best to use Compel Associated Audio commands (part of Compel
Extended Syntax) to do all the cue relay pulses. This will ensure that the relay number is
properly indexed in the bank of relays associated with that audio feed.
Note that, to ensure good time alignment with events in the audio feed, Compel Extended
Syntax may also invoke an additional delay to the relay pulse command. Along with the fixed
Compel Command Delay, the net delay should be set equal to the audio compression system
delay, thus allowing the closure to line up precisely on the start of the local avail (see Timing
Model, section 3.4.3).
One additional user cue relay is provided in the standard iPump6420. This appears on the
same rear-pane connector as the Alarm relay contacts. It may be controlled similar to the relays
discussed above, but it is not logically associated with any Audio Decoder.
All relay activity is logged to the Operational Log (see Section 3.6.3).
The user controls, primarily set from Compel, are:
1. Permanent relay setting, on/off
2. Temporary (non-volatile) relay setting, on/off
3. Pulse relay command