Antenna solutions and recommendations on antenna mounting for the SL Rack Receiver DW

AN 1106 v3.0 | 9/12
Antenna solutions and recommendations on antenna mounting
SpeechLine Digital Wireless - SL Rack Receiver DW
Signal loss due to extension cables and antenna splitters
In this scenario, the use of extension cables and antenna splitters with a remotely mounted antenna
may result in loss of transmission power, depending on the cable length.
You can compensate this signal loss by configuring the transmission power of the receiver accor-
dingly. Observe the following minimum transmission power settings (SL Rack Receiver DW: System
Settings menu -> RF Power) for the respective cable lengths. The antenna splitter causes about as
much signal loss as a cable length of 15 m. These losses must be included in the calculation of the
transmission power level.
We recommend the following cable lengths in combination with the antenna splitter:
• Receiver to splitter: 1 m -> splitter to AWM 2/4: 1 m
• Receiver to splitter: 1 m -> splitter to AWM 2/4: 5 m
• Receiver to splitter: 1 m -> splitter to AWM 2/4: 10 m
• Receiver to splitter: 5 m -> splitter to AWM 2/4: 1 m
• Receiver to splitter: 5 m -> splitter to AWM 2/4: 5 m
• Receiver to splitter: 10 m -> splitter to AWM 2/4: 1 m
Cables longer than 10 m are not recommended for this variant.
This results in the following transmission power levels to be set in the menu of the receiver or
simultaneously for all receivers in the Sennheiser Control Cockpit software:
• 5 m cable length plus splitter -> at least level 2
• 10 m cable length plus splitter -> at least level 3
The Sennheiser CL antenna cables have the following attenuation:
CL 1 PP 0.5 dB
CL 5 PP 2.5 dB
CL 10 PP 5 dB
CL 20 PP 10 dB
Direct line of sight
f If possible, position the antennas so that there is a direct line of sight (without obstacles) bet-
ween the transmitters and the antennas.