R&S SU 4200 Configuring with the R&S ZS 4200
6125.0226.12.01 3.12
Main/Standby Type
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.
Line Interface in
Local Mode
In local mode, the rear and front panel audio inputs operate in parallel
(default). The rear panel audio line interface (including SQ contact and
audio output) can be disabled for the local mode. This allows independent
use of the radio for a service technician where unwanted SQ indication or
line output must be prevented.
Local Mode
You can disable the LOC button on the radio to prevent the radio from
being switched from remote mode to local mode.
Local Mode Timeout
Local mode will be quit automatically if there is no further
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 (0).
EXT VSWR Limit
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 338. The external VSWR input
is only processed during active TX state.
EXT VSWR Polarity
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.
Single Channel
Fixed frequency cannot be changed. Frequency must be configured before
activating this function.
Motor Tuned Telsa
Filter
It is possible to connect an external motor tuned Telsa filter to the radio. In
order to activate RS-422 interface flow control, the configuration parameter
has to be enabled.
Note: The RS-485 remote control interface will be deactivated when the
external motor tuned Telsa filter is used.
Note: Enabling the external motor tuned Telsa filter will limit the
frequency range of the radio to the frequency range of the filter.
Frequency Blocking
Ranges
Up to eight frequency blocking ranges can be defined. The device will
refuse any set frequency command from MMI local operation or from
remote control which is within these frequency blocking ranges.
The configured frequency blocking ranges have to fit to the radio’s
frequency range from 112 MHz to 155.991666 MHz.
PTT Signaling
PTT can be keyed by a tone with a specified frequency that is present
within AF signal. If the parameter is on, the tone is detected and controls
the PTT function. The tone itself is suppressed within transmitted signal by
a notch filter. The frequency of the PTT tone is 2040 Hz.
PTT Signaling
Frequency
The frequency of the PTT tone is variable within a specified range.
PTT Signaling
Threshold
The level threshold of the PTT tone detector is variable within specified
range and is related to nominal audio signal level set by “TX Audio Level”.
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