Autonomous Switching And Options; Other Options - DEV 2190 User Manual

User Manual DEV 2190
In normal operation, the output of the redundancy unit is fed by the main amplifier
module (left figure below):
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If the RF level monitoring unit of the main amplifier module detects, that the signal
level is below the defined threshold level, the RF level monitoring unit of the
backup amplifier module is checked, whether this RF signal is above its defined
threshold level. If this is the case and if the device is in Auto Mode (please refer to
chapter 5.1.3), the redundancy switch module is triggered by the CPU module to
switch; i.e. the output of the redundancy unit is fed by the backup amplifier module
(right figure above).
3.1.7.1

Autonomous Switching and Options

By default, a DEV 2190 with installed redundant amplifier options provides
autonomous switching capability from the main amplifier module to the backup
amplifier module. Please refer to chapter 5.1.3 for further explanations.
With Option 22 in combination with redundant amplifier options, the DEV 2190 is
delivered with the main backup swap feature, thus the autonomous switching
works in both directions, instead of the autonomous switching from the main
amplifier module to the backup amplifier module, only.
3.1.8

Other Options

For extending the signal distribution to more than one chassis, the input signal(s)
can be split within the first DEV 2190 by applying a pre-divider option to supply the
input port(s) of this chassis and to supply the input port(s) of a second chassis. For
the pre-divider option, four 1:2 passive splitters are integrated in a module
occupying a ½ horizontal slot.
Note:

If the chassis is equipped with a pre-divider option, the remaining ½ horizontal
slot can be used for applying a second pre-divider option, only.
With Option 16, a third power supply module is installed in the DEV 2190. The
installation of this this third power supply module is recommended if the chassis is
equipped with eight or more amplifier modules.
If the DEV 2190 was ordered with Option 25, the applied amplifier modules are
covering the frequency range of the extended L-Band; they are offering more gain,
and they are providing a slope (or tilt) adjustment feature.
For applications that require a certain configuration of the DEV 2190, but initially
do not demand the complete functionality, DEV Systemtechnik offers the option to
install all the functionalities (i.e. amplifier options, distribution options, combiner
options, IRD controlled switch options/extensions) without application of the
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 Copyright DEV Systemtechnik GmbH 2009-2017
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