Alarms/GPOs
Page 6-6
Reference Guide: TT1222 4:2:0 Professional Receiver
ST.RE.TT1222.2
The outputs are not suitable for driving general purpose 5V relays which
have a coil resistance of less than 167
Ω
.
The GPOs can not be activated on power failure.
6.5
Setting up the GPOs Configuration
The TT1222 has 5 General Purpose Outputs which can be set up to trigger
on one or more events.
There are 5 events which the GPOs can always be setup to trigger on. A
sixth one is made available when the QPSK input card is fitted. Details of
these are provided in
Table 6.5: GPO Events/ Conditions
Event / Condition
Description
Section
No Input Lock:
The input is indicated as ‘locked’ when the decoder is synchronised
to the incoming Transport Stream.
On - This GPO will be triggered if the input is not locked.
Off – A input lock error will not trigger this GPO.
----
Video Error:
On - This GPO will be triggered if any of the Video Alarm conditions
detailed in Annex D, Alarm Categories and Conditions occur.
Off – A video error will not trigger this GPO.
Default: Off
Annex D
Aud 1 Error:
On - This GPO will be triggered if any of the Audio Alarm conditions
detailed in Annex D, Alarm Categories and Conditions occur in
Audio 1.
Off – An error on Audio 1 will not trigger this GPO.
Default: Off
Annex D
Aud 2 Error:
On - This GPO will be triggered if any of the Audio Alarm conditions
detailed in Annex D, Alarm Categories and Conditions occur in
Audio 2.
Off - An error on Audio 2 will not trigger this GPO.
Default: Off
Annex D
Data Error:
On - This GPO will be triggered if any of the Data Alarm conditions
detailed in Annex D, Alarm Categories and Conditions occur.
Off - A data error will not trigger this GPO.
Default: Off
Annex D
BER Exceeded: *
On - This trigger will be activated if the BER exceeds 1 X10
-4
.
Off – A BER Exceeded error will not trigger this GPO.
Default: Off
NOTE…
This item will only appear if a QPSK input
module is fitted in the receiver.
----
Each GPO can be set up individually as follows:
Summary of Contents for TT-1222
Page 10: ...Introduction Page 1 2 Reference Guide TT1222 4 2 0 Professional Receiver ST RE TT1222 2 BLANK...
Page 32: ...Options Page 3 2 Reference Guide TT1222 4 2 0 Professional receiver ST RE TT1222 2 BLANK...
Page 38: ...Options Page 3 8 Reference Guide TT1222 4 2 0 Professional receiver ST RE TT1222 2 BLANK...
Page 50: ...Alarms GPOs Page 6 2 Reference Guide TT1222 4 2 0 Professional Receiver ST RE TT1222 2 BLANK...
Page 56: ...Alarms GPOs Page 6 8 Reference Guide TT1222 4 2 0 Professional Receiver ST RE TT1222 2 BLANK...
