User Manual DEV 1951
38 Copyright DEV Systemtechnik GmbH 2004-2017
conditionally switches this sensing switch module (digital signal switch
module) to the secondary input port.
Switching from the primary input port to the secondary input port in
Simultaneous switching mode
(with two sensing switch modules (digital signal switch modules) installed):
- If all input ports are enabled, the autonomous switching is performed for
both channels from the primary input ports to the secondary input ports.
The condition is that if on the primary input port of one or of both channels
the RF level drops below the RF threshold level (the digital signal quality be-
comes "Fail", respectively) and if on both secondary input ports the RF level
is above the RF threshold level (the digital signal quality is "OK",
respectively).
- If one of the primary input ports is disabled, this port is not considered in
the switching decision, i.e. the device switches if on the enabled primary
input port the RF level drops below the RF threshold level (the digital signal
quality becomes "Fail", respectively).
There is no autonomous switching if both primary input ports are disabled.
- Disabling one or both secondary input ports encourages the switching in
this situation, since the signal information of the secondary input port(s) is
ignored.
With Option 22:
Switching back from the secondary input port to the primary input port in
Individual switching mode:
- If both input ports of a sensing switch module (digital signal switch module)
are enabled, the switching is performed as described above.
I.e. the device switches only, if on the secondary input port the RF level falls
below the RF threshold level (the digital signal quality becomes "Fail", re-
spectively) and if on the corresponding primary input port the RF level is
above the RF threshold level (the digital signal quality is "OK").
- If the primary input port of a sensing switch module (digital signal switch
module) is disabled, the RF level check (the digital signal quality check,
respectively) of this port is omitted. Thus, if the sensing switch module
(digital signal switch module) is switched to the (enabled) secondary input
port and if on the secondary input port the RF level drops below the
RF threshold level (the digital signal quality becomes "Fail", respectively),
the device unconditionally switches to the primary input port.
- If the secondary input port of a sensing switch module (digital signal switch
module) is disabled, the RF level information (the digital signal quality infor-
mation, respectively) of the port is ignored as a trigger, i.e. the device does
not switch autonomously to the primary input port.
With Option 22:
Switching back from the secondary input ports to the primary input ports in
Simultaneous switching mode
(with two sensing switch modules (digital signal switch modules) installed):
- If all input ports are enabled, autonomous switching is performed for both
channels from the secondary input port to the primary input port.
The condition is that if on the secondary input port of one or of both chan-
nels the RF level drops below the RF threshold level (the digital signal qual-
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