22   WMS420  
 
 Description   
 
Back side 
 
Figure 2: Rear panel controls on SR420 receiver 
1 ANTENNA A/B: BNC jacks for connection of the two supplied UHF antennas or remote 
antennas (optional). 
2 Carrier frequency label: An adhesive label stating the carrier frequency band is affixed on 
the back of the receiver. The enclosed frequency chart provides further information about the 
available frequencies. 
3 SQUELCH: The squelch function turns the receiver off if the received signal is too weak so 
that the associated static noise or inherent noise of the receiver are not audible when the 
transmitter is turned off. Set the SQUELCH control to minimum before turning the receiver on 
for the first time. 
4 AUDIO OUT/BALANCED: Symmetric audio output on 3-pole XLR jack: You can connect the 
microphone input of a mixer to this output, for example. 
5 AUDIO OUT/UNBALANCED: Asymmetric audio output on 6.3 mm mono jack bush. Here you 
can connect a guitar amplifier, for example. 
6 Strain relief for the supply cable of the provided AC adaptor. 
7 DC IN: Supply socket for connecting the supplied AC adapter. 
 
NOTE
 
The SR420 can be supplied with electricity via the external power pack or when using the 
antenna splitter PS4000 W, via the antenna cables. The splitter provides electricity to all 
connected SR420 receivers. 
 
 
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