Making And Checking Rf Settings (Uhf) - Sony DWM02/14 Product Information

Configuring a DWX System

Making and Checking RF Settings (UHF)

Follow the procedure shown in the flowchart below to establish parameters and check operation.
Parameters to check
1. Band usage: White space TV channel
2. Group usage: See "List of Supported Frequencies" (page 78)
3. Antenna installation location/orientation: distance to TX, height, orientation etc.
4. Antenna gain: 0 dB, 10 dB, or 18 dB
5. Number of antennas: 2, 4
6. TX RF power: 1 mW, 10 mW, or 50 mW
7. RX attenuator: 10 dB, 5 dB, or 0 dB
Flow for making and checking RF settings
Step 1
Channel plan selection
Step 2
Antenna installation and
setup
Step 3
Checking the service area
with one channel
Step 4
Checking third-order
intermodulation distortion
Step 5
Checking simultaneous
multi-channel operation
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Making and Checking RF Settings (UHF)
Check possible sources of external interference, and determine a band and group to use that
is free from external noise.
Determine the channel most susceptible to third-order intermodulation distortion (this
channel is subsequently called desired channel) and perform an operation test with the
desired channel (single channel). Determine antenna installation positions and orientation
that will be difficult to change later, and decide on number of antennas and gain settings.
Using the desired channel only, assign a range of parameters for TX RF power and RX
attenuator settings, and check coverage of the intended service area with each setting.
Power up all transmitters for channels other than the desired channel, and generate third-
order intermodulation distortion (subsequently called interference) in the receiver for the
desired channel. Assign a range of parameters for TX RF power and RX attenuator settings
and check the interference noise level with each setting.
Using settings established as acceptable in steps 1 – 4, power up all transmitters and
check the service area for the desired channel. If the service area for the desired channel is
achieved, the service area for other channels should also be equal or better.
CH: Channel
TX: Transmitter
RX: Receiver