Crystal Vision
Using the front control panel
TANDEM HD-20 User Manual R1.4
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24/05/2007
Miscellaneous menu
This menu allows the user to customise the alarm reporting from the TANDEM HD-20 to suit
their individual needs. TANDEM HD-20 has two alarm outputs, GPO5 and GPO6. These GPI
outputs in their non-alarm condition are held to the in5V via a 6800Ohm resistor. An
alarm condition will force the GPI output to less than 0.5V through a series 270Ohm resistor.
This makes the GPI outputs capable of driving an external LED or logic circuit as required.
For ease the configurable alarms have been divided into two groups, the video alarms appear
on GPO5 and the audio alarms on GPO6. This menu will then allow the user to configure the
alarm reporting by either flagging or masking individual alarms. Access to the factory-reset
function is also found here.
Menu
Comment
Misc menu
From the home menu press F4 to access the misc menu.
Press F1 to select the GPO5 (video alarms) menu.
GPO5
(video alarm)
Press F1 to activate. SCROLL to enable or disable and press ENTER
to accept.
Menu
Comment
Misc menu
From the home menu press F4 to access the misc menu.
Press F2 to select the GPO6 (audio alarms) menu.
Output channel
silence detect
(embedders C & D)
Rotate SCROLL to find the channel silence alarm to be
configured.
Press F1 to activate. SCROLL to enable or disable and press
ENTER to accept.
Silence Delay
The delay before a silence alarm is reported can be varied from
1-120 seconds. Note this a global control.
