Cloud Electronics VTX-WM1 - Manual (Page 12)

VTX-WM1 Installation Guide v1.2 12
Event Log and log configuration
A log is maintained for the amplifier. The
log records power-on and power-off, over-
temperature, impedance test pass/fail and email
alert failures, all against the on-board clock/
calendar. The Event logging pane on the Site
Configuration page lets you define which of
these events are to be recorded and whether
any (or all) of them should generate email
alerts.
For each of the six event types, one of the
following options may be set:
•
None – events of this type are ignored
•
Log only – events of this type are
recorded in the log
•
Log & email – events are recorded in
the log and also entered in an alert email,
but the email is not sent at this time.
•
Email Trigger – events are recorded
in the log, and the alert email is sent; this
will contain the current event and any
events recorded via the Log & email
option above.
The Event log for the amplifier may be
inspected by clicking on the amplifier’s button
(opens the
Amplifier Properties page),
and then clicking on Event Log below the
button.
Impedance Tests
The VTX-WM1 card includes a variable
frequency test oscillator which may be
programmed to apply a test tone (at 40 dB
below the amplifier’s maximum output level) to
the amplifier output at a future date and time,
and, if desired, at regular intervals thereafter.
(It is recommended that tests are scheduled
for the hours of building non-occupation).
The amplifier output voltage and current are
monitored during the test and hence the load
impedance checked. This gives the engineer
a first-line confirmation that all the speakers
connected to each amplifier channel are
present, connected and functional.
Clicking Tests (click the amplifier button
first) opens the Test List page for the
amplifier:
In order for the impedance tests to be
meaningful, an initial Load Configuration