Functions Description - R&S 4200 Series Operating Manual

Functioning
1.6.2

Functions Description

Function\Function "Radio".doc
Function of the
R&S XU 4200
transceiver
Front panel
control unit
USB interface
Remote control
Power supply
Display
Audio interface
Main and
standby function
The transceiver R&S XU 4200 contains the R&S EU 4250 receiver module
and the R&S VU 4250 transmitter module, which is powered by the
R&S IN 4240 power supply unit.
The front panel control unit A8 with LCD and keyboard A9 make local
control of the radio possible on a lab bench or for activities such as
installation and maintenance. You can audio-monitor to the demodulated
analog voice in the receiver module at any time by using the built-in
loudspeaker. The RF signal issued at common antenna X3 is demodulated
in the transmitter module and can be audio-monitored at any time via the
built-in loudspeaker too. You can control the volume by means of the
volume control on the front panel.
The main fan is controlled and monitored by the control unit A8.
You can configure and make basic settings for the radio via the USB
interface on the front panel. In addition you can download software of all
firmware components via the USB. The main backplane A6, which
connects all modules, contains a USB hub and connects the transceiver's
USB interface controller with the front panel control unit A7.
Remote control is performed as standard via the Ethernet − LAN interface
"Ethernet − LAN Remote Control X6" (TX) or "Ethernet − LAN Remote
Control X9" (RX) using the powerful R&S remote-control protocol GB2PP.
The radio can be powered by AC and/or DC voltage. If the AC source fails,
the radio automatically switches to the DC source. You can switch the
radio on with the switch on the front panel A7.
LEDs indicate the current operating state at all times. You can display the
operating settings, radio configuration, analog measurement values and
status in detail on an eight-row LCD.
Receiver module:
On the system side the 600 ohm audio interface "RX Audio Basic X10" is
connected to the rear panel and the squelch state can be signalled here via
a contact.
Transmitter module:
On the system side the 600 ohm audio interface "TX Audio Basic X5" is
connected to the rear panel and the PTT keying is activated. You can
flexibly configure the PTT input via service PC and adjust it to the voltage
conditions (−48 V, +28 V, optocoupler input) in the system.
Note: Audio interface can also support digital audio nterfaces of E1 and
VoIP.
For redundant system installations with 1:1 switchover, the main and
standby radios are connected with each other via hardware contacts. This
allows quick switchover without any delay in the event of a failure. In
addition, an antenna relay can be connected and controlled.
1.5
R&S XU 4200
6166.5368.02.01