R&S 4200 Series Operating Manual page 69

Configuring with the R&S ZS 4200
Main/Standby Type
Line Interface in
Local Mode
Local Mode
Local Mode Timeout
EXT VSWR Limit
EXT VSWR Polarity
Single Channel
Motor Tuned Telsa
Filter
Mute Loudspeaker
External Power
Amplifier
Frequency Blocking
Ranges
The main/standby type declares if a radio should start up as an active main
radio or as an inactive standby radio. If the common AC- or DC-supply of a
main/standby installation is powered up, then the radio will boot
accordingly.
Note: The parameter Main/Standby Type is also used for the Best Signal
Selection if this functionality is enabled.
In local mode, the rear and front panel audio interfaces as well as the VoIP
and E1 data streams operate in parallel (default). The rear panel audio line
interface (including PTT) as well as the VoIP and E1 data streams can be
disabled for the local mode. This allows independent use of the radio for a
service technician where unwanted radio keying from the system-oriented
PTT line input must be prevented.
You can disable the LOC button on the radio to prevent the radio from
being switched from remote mode to local mode.
Local Mode will be
activity on the front-panel radio keys or if local PTT (Push-To-Talk) is not
re-keyed any longer. Timeout can be set between 60 s and 900 s, or
disabled.
The external VSWR limit specifies the voltage threshold for the analog
input EXT-VSWR (X7.8). Especially for installations with external
circulators the voltage from an external SWR-detector can be connected to
the radio in order to generate CBIT warning 0338. The external VSWR
input is only processed during active TX state.
Polarity of the external VSWR voltage. Positive polarity means the CBIT is
generated if the measured value is above the defined limit. Negative
polarity means the measured value is below the defined limit.
Fixed frequency cannot be changed. Frequency must be configured before
activating this function.
It is possible to connect an external automatic filter to the radio. Either
Telsa or R&S filter can be used. In order to activate RS-422 interface, the
configuration parameter has to be enabled.
Note: The X-cross adapter KG42-Z75 is required for operation with the
R&S filter Fx22x.
Note: Enabling the external automatic filter will limit the frequency range of
the radio to 118 MHz ... 155.9916 MHz.
The loudspeaker of the radio can be muted if the PTT is keyed.
The parameter External Power Amplifier has to be set to R&S or Jotron in
order to control an externally connected power amplifier. Please refer to
chapter 3.13 External Power Amplifier.
Up to eight frequency blocking ranges can be defined. The device will
refuse any frequency set command from MMI local operation or from
remote control which is within these frequency blocking ranges.
The configured frequency blocking ranges have to fit the radio's
frequency range from 112 MHz to155.991666 MHz.
3.17
quit automatically if
R&S XU 4200
there is no further
6166.5368.02.01