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Configuring a DWX System
Booster power supply
The booster power supply voltage, drive voltage, and supported gain will differ, depending on the
equipment. Refer to the table below for details.
*1 Separate power supply voltage setting for antenna A/antenna B not supported.
*2 Separate power supply voltage setting for antenna A/antenna B supported.
*3 0 V is not supported. Use as a passive antenna is not possible. Power supply must be provided.
*4 Supplying 12 V to legacy models may result in fatal damage. When selecting 12 V, be sure to obtain a new AN-820A. When
*5 The antenna output level reflects the attenuator setting. In a cascaded connection, set the attenuator on the second unit to 0
*6 In the Auto mode, gain is 10 dB with 9 V DC and 18 dB with 12 V DC.
Antenna Installation Requirements
The antenna installation conditions for the DWX system are basically the same as for analog wireless systems.
Consider the following points when planning an installation.
The transmission distance of a wireless system will differ greatly, depending on factors such as how the
equipment is worn on the body, the presence of obstacles, etc. Before finalizing an installation, be sure to
check the reception condition, as described in "Checking the RF Level (UHF)" (page 45).
BNC cables
The connection between antenna and receiver is made with BNC cables, as in an analog wireless system.
If there are existing cable installations from an analog wireless system, these can be used.
BNC cable types
75-ohm BNC cables can also be used.
For information on available distances under different conditions, see "Distance between transmitter and
antenna" (page 43).
Note
When configuring a new system, the use of 5D-2V -- 8D-2V BNC cables is recommended.
40
UHF System Configuration
Supply voltage
Model
Category
for AN series UHF
name
antennas
DWR-R01D
0 V/9 V/12 V
Receiver/Divider
DWR-S01D
0 V
WD-850
0 V/9 V/12 V
AN-01
Antenna/Booster
AN-820A
WB-850
supplying 12 V to an owned AN-820A, make sure that a label that includes frequency information is affixed next to the LED
indicators at the bottom of the unit.
dB, to prevent attenuation values from being added up.
Wireless microphone systems commonly use BNC cables for antenna connections. There are a number
of standards for BNC cables, with different specifications for impedance and cable gauge (attenuation
characteristics).
For example, in a standard classification such as "5C-2V" and "8D-2V", the first numeral indicates the
cable gauge (thickness), and the subsequent letter indicates the impedance: "C" stands for 75 ohms
and "D" for 50 ohms.
Both for analog wireless systems and digital wireless systems, Sony recommends "5D-2V" -- "8D-2V" cables
with 50-ohm impedance because these have lower transmission losses.
When configuring a system in venues with existing cables, 75-ohm cables can also be used. When a DWX
receiver is connected to a 75-ohm cable, in principle there will be a transmission loss due to impedance
mismatching, but this loss amounts only to a few decibels. Because this is smaller than the loss introduced
by the cable length, it often can be disregarded.
Not only BNC cables but also BNC connectors come in two types, rated either for 50 ohms or 75 ohms
impedance. When a 75-ohm cable is connected to a 50-ohm connector, an impedance mismatch
occurs, but in practice this is often disregarded because the influence is small.
More important than the difference between 50 ohms and 75 impedance are differences in signal losses
introduced by two cables of different length. (With a 5D-2V cable, a 10-meter difference amounts to a
difference of about 3 dB.)
Voltage
Voltage selection
Drive voltage
selection
method
method
Menu*1
—
—
Front-panel switch*
2
*
6
9 V/12 V*
3
Switch
—
9 V/12 V*
3
*
4
None (Auto) Auto*
9 V – 12 V
Gain/attenuator
Support gain/attenuator
Voltage selection
method
5
0 dB/–5 dB/–10 dB*
Menu
0 dB/–5 dB/–10 dB
Menu
0 dB
0 dB/10 dB/18 dB/Auto*
6
Trim switch
6
Auto only
—
–10 dB/0 dB/+10 dB
Selector switch
—
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