User Manual DEV 1953
44
Copyright DEV Systemtechnik GmbH 2015-2017
With (activated) Option 28:
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, if on the primary input port the RF level is above
the RF threshold level again (and the digital signal quality is "OK" again,
respectively) plus an offset value (chapter 5.5.7.3.2).
- If the primary input port of a sensing switch module (digital signal switch
module) is disabled, the RF level check (and the digital signal quality check,
respectively) of this port is omitted. Thus, the device unconditionally
switches to the primary input port.
- The secondary input port is not considered in the switching decision in this
scenario. Therefore, it does not matter whether the secondary input port is
disabled or enabled.
With (activated) Option 28:
Switching back from the secondary input ports to the primary input ports in
Simultaneous switching mode:
- If all input ports of a group (chapter 5.1.4) are enabled, the autonomous
switching is performed for all members of the corresponding group from
the secondary input ports to the primary input ports.
The condition is that on all primary input ports of the group the RF level is
above the RF threshold level again (and the digital signal quality is "OK"
again, respectively) plus the offset value (chapter 5.5.7.3.2).
- If one (or more) primary input port(s) of a group is (are) disabled, the
RF level information (and the digital signal quality information,
respectively) of the port(s) is omitted. Thus, disabling one or more primary
input port(s) of a group encourages the switching in this situation, since the
signal information of this (these) primary input port(s) is ignored.
- The secondary input port(s) of a group is (are) not considered in the
switching decision in this scenario; therefore it does not matter whether
the secondary input port(s) of a group is (are) disabled or enabled.
5.1.4
Individual/Simultaneous Switching Mode
Regarding the signal routing all channels of a DEV 1953 are independent from each
other, but the device provides two switching modes: Individual switching mode and
Simultaneous switching mode.
In Individual switching mode, the installed switch modules can be switched inde-
pendently from each other. In Simultaneous switching mode a group of switch
modules is switched synchronously to the same input port (either to the primary
input port "
In A
" or to the secondary input port "
In B
").
In Local Mode, the selection between Individual switching mode and Simultaneous
switching mode can be performed either via the switching mode push button at the
device panel (labeled
8
in the figure of chapter 3.1.1) or via Web Interface
(chapter 5.5.4.1).
In Remote Mode, the selection between Individual switching mode and
Simultaneous switching mode can be performed via Sandar Prosan protocol
(chapter 5.6.3.8) or via SNMP (chapter 5.9.4.3.3).