Grass Valley XtenDD DD - Manual (Page 115)

5. Connection and Startup
5 - 53 Planning and Installation - Rev. 3 / 04.2005
5.7 ALARM SPECIFICATIONS
Specification according to SMPTE 269M:
The standard describes a simple interface over which television equipment can be
report the occurrence of internal failures and faults in incoming signals. It is in-
tended for use in all television equipment, from the simple active devices to the
most complex.
Electrical characteristics:
Optoislated output
Maximum voltage: 24V
Maximum output current: 150 mA max.
However, according to SMPTE 269M proposal
the sensing device shall not supply more than
20 mA of current to the reporting device
(i.e. the switcher).
Output Interface (simplified):