51
Making and Checking RF Settings (UHF)
Using the desired channel subject to severe conditions, assign a range of parameters for TX power output and
RX attenuator settings, and check whether the settings result in coverage of the intended service area.
Step 3 Checking the Service Area With One Channel
12 Power up only the desired channel TX and establish a setup simulating the expected
conditions during actual operation.
Example: If the TX is the DWM-01, it should be held in the hand, close to the mouth.
If the TX is the DWT-B01, it should be worn on the hip.
* Equipment other than TX (RX, boosters, etc.) should be constantly on.
13 Make the parameter settings, and move the desired channel TX throughout the service area,
checking at various locations.
Sample settings for checking
Band to use: Band established in step 1.
Group to use: Group established in step 1.
Antenna installation location/orientation: As determined in step 2.
Antenna gain: As determined in step 2.
Number of antennas: As determined in step 2.
TX RF power: To be determined in this step *
1
(settings 1 to 6 in table below)
RX attenuator: To be determined in this step *
1
(settings 1 to 6 in table below)
Procedure
TX RF power
1 mW
10 mW
RX ATT
10 dB
Setting 1
Setting 4
5 dB
Setting 2
Setting 5
0 dB
Setting 3
Setting 6
Sample results
TX RF power
1 mW
10 mW
RX ATT
10 dB
Setting 1: Poor
Setting 4: Good
5 dB
Setting 2: Fair
Setting 5: Good
0 dB
Setting 3: Good
Setting 6: Good
As 50 mW output of the TX produces high third-order intermodulation distortion, it is not suited for
simultaneous multi-channel operation. Therefore, 50 mW output is excluded from the items for checking.
Checking procedure
Check the following:
No dropouts in audio signal
RF indicator lit in green
QL meter shows more than 4 segments
*1 When multiple TX are used in step 4 and following, changing the TX RF power for a high number of channels is time-consuming.
On the other hand, changing the RX attenuator setting can be done at the first DWR-R01D of the cascaded configuration and is
therefore relatively easy. To simplify the procedure, you can first perform steps 3 to 5 by changing the RX attenuator setting only,
and then change the TX RF power and repeat steps 3 to 5.
Configuring a DWX System
