GUIDE TO INSTALLATION AND OPERATION
HCO-1822 |
15
.
Audio – Silence CH1 (same for CH2-16)
This error flags the continuous absence of sound level in the
specified audio channel for a specified duration.
NB – this error applies only to PCM audio
This error can be Enabled using the checkbox, and the level set to 1,
2 or OFF.
The user sets the detection parameters for this error using two
sliders:
•
Threshold (dB) – sets the signal level below which silence will
be considered to have been detected.
•
Duration (sec) – sets the time interval over which silence must
be continuously detected before the error is flagged. An
additional delay of 0.5 sec is included to prevent switching
when there are nearly-coincident errors at the two inputs.
Use the
LED Color
pulldown to choose the color that will be
displayed by the status LED on the card edge when a Silence CH
error is detected. Choices are:
•
Green, Yellow, Red, Flashing Red
Global alarms
The parameters found under the Global tab do not have individual control panels.
These alarms DO NOT CONTRIBUTE to the switch decision
process, but are included in the card status.
Four parameters are included in the Global Alarms list:
•
Ref Presence – checks for the presence of a reference
signal on the rear panel connector
•
Backup input – LED remains Red as long as the backup
input (input 2) is selected – valid in AUTO MODE only
•
Bypass Mode – indicates whether the HCO-1822 is in
Bypass
mode
•
GPI Power Box – detects whether a GPI box is supplying
power to the GPI connector on the rear panel. Displays an
error when the alarm is enabled and no power is detected.
Each parameter has two configurable features:
•
Enable
– click in the
Enable
check box to include the alarm in the card status
•
LED Color
- click on the color name in the LED Color column and a pulldown will appear offering the choice of
Green, Yellow, Red or Flashing Red. The current status is shown by the colored icon in the right-hand column
Figure 3.16 Silence CH alarm configuration
Figure 3.17 Global alarms
