Image Quality not OK: Alarm output = true
The red circle around the Focus dial in the figure above indicates that the alarm is raised by
the Focus measurement. The Exposure dial has no red circle, although the pointer is in the
Hysteresis area. This shows that Exposure was correct before and that this measurement in
itself is not the cause of the alarm.
Note: In addition to the visual indications on the web pages, alarms can also be read from
the BC840-MC 's internal Management Information Base (MIB) using appropriate software,
or through TKH Security's Open Streaming Architecture (OSA) - that is, the "SPI API". The
BC840-MC includes SNMP support for its image monitor and tampering detection. A trap is
sent when bad image quality or camera tampering has been detected and another one when
the situation returns to normal. This support requires a new SNMP MIB, the OPTC-VCA-MIB,
which can be downloaded at www.tkhsecurity.com/support-files.
Video
87
