Media Control Protocol for ew G4 series

TI 1254 v1.0 - ew G4 | 28/37
Technical information
Media control protocol description
States [get only by cyclic attributes]
Valid for device EM only
Description
This attribute is sent to media control together with other cyclic attributes. The first parameter
shows Mute flags since last cycle. „Since last cycle“ means that this parameter does not represent
the current mute status but what happened during last cycle. For instance at the beginning of a
cycle there is no RF-Mute. Thus bit 2 is set to ‚0‘. If a RF-Mute occurs this bit is set to ‚1‘. This bit
stays ‚1‘ even then when RF-Mute does not exist anymore when the cyclic attributes are sent out
next. This bit 2 is set to ‚0‘ if RF-Mute is not detected for more than a complete cycle. In other words
these bits are set to ‚1‘ whenever within a cycle the appropriate mute was active.
Bit 0 is set to ‚1‘ if for more than one complete cycle any kind of mute (TX, RF or RX) was active. For
instance when bit 0 is set to ‚0‘ and bit 2 is set to ‚1‘ it means that RF-Mute was detected once since
last cycle but it was not permanently active. When bit 0 is set to ‚1‘ and bit 2 is set to ‚1‘ it means
that RF-Mute was active for the complete cycle. If the pilot tone is deactivated, the pilot flag will be
processed.
The second parameter shows the Pilot flag since last cycle.
Parameters
Name Value range Get request Set request Relative
change
Mute flags Bit 0: Mute
Bit 1: TX-Mute
Bit 2: RF-Mute
Bit 3: RX-Mute
- - No
Pilot flags 0: since last cycle no pilot signal
was detected
1: since last cycle a pilot signal was
permanently received
2: since last cycle a pilot signal was
not permanently received, i. e a
change in reception of pilot signal
occurred within last period
- - No
Examples
States 3 0<CR>
RF-Mute occurred during last cycle, no pilot signal detected for complete cycle.
States 9 1<CR>
TX-Mute and RX-Mute detected during last cycle, pilot signal detected for complete cycle.
States 0 2<CR>
No Mute occurred during last cycle, pilot signal changed within last cycle.
See chapter „Response of cyclic attributes“ on page 9.