iPump 6420 User’s Manual
www.wegener.com 800070-01 Rev B Chapter 3, Page 82
Figure 3-17: iPump6420 File Insertion Timing Model
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Closure #1
Pulse
0seconds
Audio & closure inputs to Compel & MPEG audio
compression system from customer automation system
I6420 audio decoder outputs to
internal mixer
Live audio delay = uplink compression system delay + satellite delay + iPump audio buffer delay
Spot insert
(60 seconds)
= satellite delay + NETCON delay + iPump COMPEL Cmd delay + iPump audio buffer delay
Insert timing error
Audio input
PIO input
(to activate
COMPEL macros)
Decoded
Live Audio
to mixer
Decoded
File audio
to mixer
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Wegener i6420 Store/Forward Local File Insertion Timing Model*
Rev 7/22/09
9:53 AM
Insert begins per
Closure #1
Insert ends at end of
local file
= (NETCON delay + iPump COMPEL cmd delay) - U/L compression delay
60
Music trackMusic track
Music track Music track
COMPEL-cmd’d
Insertion delay
Insertion Timing error = COMPEL-cmd’d Insertion delay – Live audio delay
Insertion Timing error
{
Nil
Nil
Closure Event causes insertion request macro in Compel
* Example only, not to scale
