Sony DWM02/14 User manual

Digital Wireless
Microphone System
System Integration Guide

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Table of Contents
Outline 3
Digital Wireless Outline 4
What is DWX?...........................................................4
What Is WiDIF-HP? ....................................................5
What Is Cross Remote? ...........................................6
Technology 7
WiDIF-HP Technology...............................................7
Key Features of WiDIF-HP .......................................10
WiDIF-HP Precautions.............................................16
Cross Remote Technology....................................20
Cross Remote Features .........................................26
Cross Remote Precautions....................................30
Configuring a DWX System 31
DWX System Configuration...................................31
System Sections and Configuration Flow .................31
System Limitations ......................................................32
Audio Equipment Selection..................................33
Equipment Features ...................................................33
UHF System Configuration ....................................37
System Configuration.................................................37
Equipment Features ...................................................38
Antenna Installation Requirements...........................40
Making and Checking RF Settings (UHF).............44
Checking the RF Level (UHF)......................................45
Step 1 Channel Plan Selection .................................46
Step 2 Antenna Installation and Setup....................48
Step 3 Checking the Service Area With
One Channel............................................................51
Step 4 Checking Third-order Intermodulation
Distortion ...................................................................52
Step 5 Checking Simultaneous Multi-channel
Operation .................................................................53
Troubleshooting..........................................................55
Quick Check...............................................................56
Network System Configuration.............................57
System Configuration.................................................57
Equipment Features ...................................................60
Installation of Remote Control Unit RMU-01 ..............61
Network Device Connections....................................63
Making and Checking Network Settings.............64
2.4 GHz area operation check ..................................65
Step 1 Network Setup ................................................66
Step 2 Checking Equipment Connections..............69
Step 3 Checking for 2.4 GHz Interference................71
Step 4 Checking the Monitor Function ....................71
Step 5 Checking the Control Function ....................71
Sample System Configaration 74
Sample Minimum System Configuration
(2 channels).............................................................74
Sample Small-Scale System Configuration Using
Remote Control Unit RMU-01 (7 – 16 channels) .....74
Sample Medium-Scale System Configuration Using
Antenna Divider WD-850 (17 channels or more) ...75
Sample Maximum System Configuration
(82 channels)...........................................................76
References 77
List of Supported Frequencies ...................................77
Equipment Specifications ..........................................78

3
Sony started in the wireless microphone business in 1974 with the introduction of a 40-MHz band VHF system. This was
soon followed by an industry-first PLL Synthesized VHF system in 1983. Continually enhancing its wireless products line,
Sony introduced a groundbreaking 800-MHz band PLL Synthesized UHF Wireless Microphone system at the NAB event
in 1991. Throughout this period, Sony has been at the forefront of technology -- offering the first UHF PLL Synthesized
Wireless Microphone system with 282 selectable channels, introducing a space diversity RF reception system, realizing
42 operational channels with a 36-MHz band width, and more. These technologies have been adopted for the range
of Sony wireless microphone systems available today. Providing superb audio performance, operational flexibility,
and reliability, these systems have been widely accepted in a broad range of professional audio applications from
broadcasting, production, and theater to entertainment and conferences.
Sony has consistently developed these systems with the following in mind:
Superb audio performance with wide dynamic range
Highly stable signal transmission
Flexible simultaneous multi-channel operation
While Sony wireless microphone systems have greatly innovated professional audio operations, the growth in
popularity of high-definition (HD) content creation and digital audio recording/transmission has called for the
development of large-scale, multi-channel wireless microphone systems with improved sound quality. In response to
these important requirements, Sony continues to strive to develop a digital audio wireless transmission technology
that can match the quality and performance of a wired transmission technology and that can also cope with the
increasing need for simultaneous multi-channel operation.
Sony is offering a broad lineup of digital wireless products available as options for various audio systems. Solutions
range from electronic news gathering (ENG) systems with a bundled camcorder to full-fledged studio/concert systems
supporting simultaneous multi-channel operation. This provides users with the flexibility to configure exactly the digital
wireless microphone system they need.
Outline
......57
.......57
.......60
.......61
.......63
......64
.......65
.......66
.......69
.......71
.......71
.......71
74
.......74
g
) .....74
sing
e) ...75
.......76
77
.......77
.......78
Outline

4What is DWX?
DWX Transmitter Series
DWX Microphone Series UHF Accessories (Option)
Status Monitor & Parameter Control
Network Accessories (Option)
Status Monitor & Parameter Control
DWX Receiver Series
DWX Adapter
DWM-01/F31
Digital Wireless
Microphone
DWR-R01D
Digital Wireless Receiver
DWM-01/C31
Digital Wireless
Microphone
DWT-B01
Digital Wireless
Transmitter
DWT-P01
Digital Wireless
Transmitter
AN-820
UHF Antenna
WD-850
UHF Antenna
Divider
AN-01
UHF Antenna
DWR-S01D
Digital Wireless Receiver
DWA-01D
Digital Wireless Adapter
BNC Cable
LAN Cable
RMU-01
Remote Control Unit
“Cross Remote”
Wireless
Communication Computer on
which Wireless
Studio installed
Computer on
which Wireless
Studio installed
“Cross Remote” Protocol
Wireless
transmission
WiDIF-HP
Hub Hub
DWX refers to Sony’s new digital wireless microphone system. The DWX series reflects Sony’s extensive expertise in
professional microphones and sound design. It represents a successful blend of Sony know-how, wireless technology
renowned for stability, and cutting-edge digital audio technology.
In addition to realizing the high sound quality possible with a digital system, the DWX series supports multi-channel
simultaneous operation, encrypted transmission, and metadata transmission for monitoring the status of multiple
transmitters. Using a main link and a separate additional link, remote control of transmitters from the receiver is also
possible. With its many advanced features, the system has the potential to revolutionize the workflow of professional
applications.
What is DWX?
Digital Wireless Outline
System Configuration Example (Conceptual Diagram)
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5
What Is WiDIF-HP?
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WiDIF-HP (WiDIF: Wireless Digital Interface Format, HP: High Profile) is a wireless digital audio interface format developed
by Sony.
It enables highly secure transmission with high sound quality and low system latency, and supports simultaneous multi-
channel operation.
What Is WiDIF-HP?
High Sound Quality Wireless Transmission
Simultaneous Multi-Channel Operation
Encrypted Transmission Provides Security
WiDIF-HP uses 24 bit/48 kHz sampling, resulting in superb sound that surpasses
CD quality. Dynamic range of more than 106 dB, wide frequency response
of 20 Hz to 22 kHz, and a low system latency of 3.4 ms** ensure excellent
performance. Additionally, there is no compander, resulting in faster response
than is possible with conventional analog wireless systems.*
*Unless otherwise specified, this refers to analog wireless systems that include a compander.
Because WiDIF-HP is highly resistant to interference, about 50 percent more channels can be operated simultaneously, compared to
analog systems.
Security is an important requirement for wireless systems handling the transmission of audio signals. In an analog wireless transmission
system, the transmitted audio signal is at risk of being intercepted by a receiver of an outside system. When using FM modulation,
audio signals can be received by anyone with the right equipment and some technical knowledge. By contrast, the digital audio
wireless transmission system transmits encrypted audio data, which mitigates the risk of such interception and provides highly secure
transmission for even the most critical applications.
Analog Wireless System
Intermodulation free special channel allocation is necessary.
Analog Wireless System Digital Wireless System (WiDIF-HP)
Digital Wireless System (WiDIF-HP)
Equally spaced easy channel allocation is available.
**When DWM-01, DWT-B01, and DWR-R01D are used in
combination. When analog output is combined with the
DWR-S01D, the latency rating is 3.6 milliseconds.
FM-modulated
audio signal
The risk of being intercepted by
a receiver of an outside system.
Encrypted data
Digitally modulated
coded audio
WiDIF-HP Specifications
Sampling frequency 48 kHz
Quantization 24
bit
Frequency response 20 Hz – 22 kHz
Dynamic range 106 dB typ. (A-weighted)
THD 0.03% or better
Occupied bandwidth 192 kHz or less
Modulation principle π/4 Shift QPSK
Audio latency 3.4 milliseconds **
Digital Wireless Outline

6What Is Cross Remote?
Cross Remote is a system that allows transmitters to be monitored and controlled from a receiver and the Wireless
Studio control software installed on a computer connected to the receiver. For example, the settings of a transmitter
worn under clothing can be easily changed over the wireless link.
Scalable Wireless Remote Control System
Cross Remote Functions
Control Software Wireless Studio
Wireless Studio is a dedicated software application supplied with the Digital
Wireless Receiver DWR-R01D.
Wireless Studio can be used both in ST mode and NT mode.
Wireless Studio provides the following functions.
Monitor and control up to 82 transmitters simultaneously.
Display the status of the receiver and remote control unit, in addition to that of
the transmitter, on the computer monitor.
Save configuration data and monitor setting data. Return configuration data
to an earlier state.
Create an error log, which can be useful, for example, in identifying the cause
of reception problems.
Two types of wireless remote control systems can be configured, to fit the system size and requirements.
ST mode (Standalone mode)
Transmitter and receiver communicate directly in a one-on-
one configuration.
When the receiver is placed within a main link service area,
Cross Remote can be used within a range of about 10 meters
from the receiver. To control more than six transmitters, the NT
mode system should be used.
The DWR-S01D can be used as a receiver only in ST mode.
Monitor function
Allows you to monitor transmitter setting and status
information sent as metadata in WiDIF-HP format. Monitoring
can be performed on the receiver display, camcorder menu
screen, or multiple computers on which Wireless Studio is
installed that are connected to the network.
NT mode (Network mode)
Transmitters and receivers communicate via the Remote
Control Unit RMU-01 connected to a network.
One remote control unit can control up to 82 transmitters,
which allows network-based system management regardless
of receiver location. The service area range is about 10 meters
from the control unit.
Control function
Allows remote control of the transmitter from the receiver and
Wireless Studio application via a 2.4 GHz band IEEE802.15.4
wireless communication standard that is separate from the
main communication line of the UHF. This is done without
affecting the battery life, audio quality, and other features
of the wireless microphone. Nearly all of the parameters of a
transmitter including those for the attenuator, low-cut filter,
power, and frequency can be controlled from the receiver.
Meta Data
on WiDIF-HP
Control Data
on Ethernet
Status Monitor & Parameter Control
Ethernet HubEthernet Hub
Control Data
on 2.4GHz
DWR-R01D
AN-01
PC
DWM-01
DWT-B01
RMU-01
Conguration for NT mode
LAN Cable
LAN Cable
BNC Cable
What Is Cross Remote?
Digital Wireless Outline Tec
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7
WiDIF-HP Technology
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Technology
WiDIF-HP Technology
A new high-profile format for the digital audio interface on UHF – WiDIF-HP -- has been developed for the DWX series.
This section provides further details on WiDIF-HP technology.
A digital audio wireless transmission system handles audio after the analog signal has been converted into digital form by an A/D
converter.
In conventional analog wireless systems, the compander providing compression and expansion is a key component for enabling wide
dynamic range. The compander system uses complex analog circuitry for maintaining sound quality and response characteristics.
However, this analog system requires advanced techniques to keep performance levels constant, because analog circuits are subject
to the performance instability and adjustment tolerances of parts.
By contrast, the digital audio wireless transmission system is free from such instabilities as it does not require a compander system. In
short, digital audio wireless transmission is an optimum system to transmit high-quality audio signals without deterioration.
WiDIF-HP Technology Outline
Transmitter
Microphone
24 bit
Mixer
Amp.
A/D CODEC Channel
Coder
Digital
Modulator
Full digital processing
Digital modulation
RF Block
48 kHz
Upon receiving the modulated carrier wave from the transmitter, the receiver reproduces the digital audio signal and outputs it as either
an analog or digital signal to audio equipment such as an audio mixer or a power amplifier. This section describes the processes that
occur within the receiver.
In the RF block, the received signal is digitized by the A/D converter. Similar to the transmitter, three main processes are then performed
in the signal processing block: digital demodulation, channel decoding, and codec processing.
After receiving the signal from the RF block, the digital demodulator reproduces the digital stream that was channel coded at the
transmitter. Then the channel decoder performs synchronization, decryption, error processing, and audio data extraction. The codec
expands the signal that was data reduced to a low bit rate in the transmitter and reconstitutes the digital audio signal. The reconstituted
digital audio signal is routed through the D/A converter and amplifier to be output as an analog audio signal or as a digital signal
corresponding to standard audio interface specifications such as AES/EBU.
Receiver
24 bit
Mixer
Camcorder
Amp.
D/A
Channel
Decoder
AES/EBU
Full digital processing
RF Block 48 kHz
Digital
Demodulator CODEC
The transmitter in the digital audio wireless transmission system digitizes analog audio signal inputs from microphones and mixers and
then wirelessly transmits them as a digital signal. This section describes the processes that occur within the transmitter.
An analog audio signal is first amplified in the amplifier and digitized in the A/D converter. The codec then applies data reduction
techniques to the digital signal from the A/D converter and transcodes it into a digital bit stream with a lower bit rate. In the channel
coding section, sync data and error processing data required for wireless transmission are added to the audio data, and the resulting
data are encrypted. The digital modulator generates the π/4 QPSK modulation signal used to transmit the channel coded digital stream
over the digital wireless link. The modulated signal is supplied to the RF block which amplifies the modulated carrier to the power level
required for transmission.
Technology

8WiDIF-HP Technology
Sony’s Proprietary WiDIF-HP Codec
In the wireless system, audio signals have to be transmitted within a limited wireless bandwidth. Transmitting
the highest possible quality audio in this limited bandwidth is the major issue for wireless microphone
development. In addition, low-latency audio transmission is another requirement of microphone applications.
To transmit the best quality audio within limited bandwidth, Sony developed a digital wireless transmission
system that employs a proprietary WiDIF-HP codec, which realizes both outstanding sound quality and low
latency.
The WiDIF-HP codec is characterized by the following key features.
Outstanding sound quality with 24-bit/48-kHz sampling

Low latency
Secure transmission
The Sony digital audio codec achieves an optimum balance between sound quality, bit rate, and latency,
while having the redundant bit assignment necessary for wireless transmission.
A/D
24 bit
@48-kHz fs
1152 kb/s 192 kb/s
Audio Data
AF Channel Coding Digital
Modulator RF
Encrypted
&
Packetized
Data
De-modulated
Data
Decripted
Audio Data
CODEC
Down Sampling
&
Bit Compression
D/A
24 bit
@48-kHz fs
1152 kb/s
RF Channel Decoding
Digital
De-modulator AF
CODEC
Up Sampling
&
Bit Expansion
Transmitter
Receiver
Technology
Channel Coding and Decoding
A/D
24 bit
@48-kHz fs
1152 kb/s 192 kb/s Packetized
Data
Audio Data
AF Channel Coding
Encrypted
&
De-modulated
Data
Digital
Modulator RF
CODEC
Down Sampling
&
Bit Compression
D/A
24 bit
@48-kHz fs
1152 kb/s
RF Channel Decoding
Digital
De-modulator AF
CODEC
Up Sampling
&
Bit Expansion
Transmitter
Receiver
Decripted
Audio Data
In order to ensure high quality audio signal transmission within the given bit rate limits, WiDIF-HP employs
synchronization technology to keep the error count as low as possible, along with error processing technology
that minimizes the risk of noise when an error occurs. These techniques were developed and optimized using
extensive simulation and field testing programs covering all wireless system operation aspects such as RF
signal attenuation, Doppler effect, RF reflections, and more. Signal encryption is also handled at the coding
stage.
Digit

9
WiDIF-HP Technology
ting
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RF
AF
RF
AF
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ding
Digital Modulator and Demodulator (QPSK)
Sony has developed a new digital modulator and demodulator that allows large-scale simultaneous multi-
channel operations.
In addition to benefiting from advanced RF technology know-how in the field of analog wireless transmission
systems, the digital audio wireless transmission system also incorporates a digital modulation system that is
less vulnerable to wave interference. These technologies allow highly stable wireless transmission even for a
large number of simultaneous multi-channel operations. The newly developed Sony digital modulator and
demodulator enables up to 12 channels of simultaneous multi-channel operation in a bandwidth of just 6
MHz. Using a unique algorithm optimized for wireless microphone applications, the digital modulator and
demodulator are small enough to be integrated into an FPGA for portable devices.
Mapping
Filter
Filter
Detector
Demodulator
Digital modulator on the one-chip IC
Digital modulator on the one-chip IC
DATA
DATA
Modulated signal
QPSK modulation
RF
I
Q
I
Q
A/D
24 bit
@48-kHz fs
1152 kb/s 192 kb/s
Audio Data
AF Channel Coding
Encrypted
&
Packetized
Data
Digital
Modulator RF
CODEC
Down Sampling
&
Bit Compression
D/A
24 bit
@48-kHz fs
1152 kb/s
RF Channel Decoding
Digital
De-modulator AF
CODEC
Up Sampling
&
Bit Expansion
Transmitter
Receiver
De-modulated
Data
Decripted
Audio Data
Technology

10 Key Features of WiDIF-HP
High-Quality Sound Transmission on a Par With Wired Microphones
High sound quality is the most important aspect for a wireless transmission. This is achieved through wide
dynamic range, flat frequency response, and excellent transient response performance, factors that are
essential for high-performance broadcasting and PA systems.
Analog systems make use of companders to provide the required dynamic range. However, while compander
systems have improved over time, their inherent problems with regard to sound quality and transient response
performance have not been completely solved.
WiDIF-HP technology was developed by Sony to fundamentally improve the transient response performance
and therefore further enhance sound quality. It employs 24-bit/48-kHz sampling and provides:
Wide dynamic range of more than 106 dB
Wide frequency response of 20 Hz to 22 kHz
Superb transient response performance
Low latency audio transmission
The second key aspect of the WiDIF-HP codec is low latency. In a digital device, signal delays can often occur
due to the sampling, synchronization and calculation process. In particular, when wireless microphones are
used for vocals or speech applications, keeping this delay short is crucial.
In a commonly used codec such as the MPEG AAC, more than 20 milliseconds are required just for decoding.
The high processing speed of WiDIF-HP provides a fundamental solution to this problem and further enhances
sound quality by realizing a total delay of only 3.4 milliseconds* over the entire path from A/D converter in the
transmitter to D/A converter in the receiver.
High-speed response approaching linear systems
Low latency of only 3.4 milliseconds* in send/receive path
Frequency Response
Response [dB]
Frequency [kHz]
Dynamic Response
Analog Wireless System Digital Wireless System
(WiDIF-HP)
1.2 m
Total latency (A/D to D/A): 3.4 msec.*
Converted to spatial distance:
Low latency
*This is the combined latency of the Digital Wireless Microphone DWM-01, Digital Wireless Transmitter DWT-B01, and Digital Wireless
Receiver DWR-R01D.
When analog output is combined with the Digital Wireless Receiver DWR-S01D, the latency rating is 3.6 milliseconds.
Key Features of WiDIF-HP
Note
When digital mixers or similar
equipment are used along with the
digital wireless system, their latency
values will be added. It is therefore
necessary to consider the overall
latency of the system.
This section describes the advantages of WiDIF-HP technology. Stab
Technology

11
Key Features of WiDIF-HP
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Stable Wireless Operation Highly Resistant to Interference
Compared to conventional analog systems, the DWX series employing the WiDIF-HP format provides
significantly better rejection of noise, third-order intermodulation, same-frequency interference and other
forms of interference. The improvement is on the order of 20 dB or more (more than 10 times better in terms of
reception voltage level). This results in improved operation stability.
Analog system
The D/U (Desired/Undesired) signal ratio will be the S/N ratio of the demodulated audio signal. Because
interference will be reproduced as noise, the higher the undesired signal level, the higher the noise will be in
the modulated signal. Typically, analog systems require a D/U signal ratio of 40 dB or more.
Digital wireless system
Provided that there are no errors, the audio signal quality will not be degraded. In the Sony digital wireless
system, an error does not occur provided the D/U signal ratio is 20 dB or more. Therefore sound quality will not
be impaired as long as this condition is met.
CH 4CH 2 CH 3CH 1CH 1
FM modulation Digital modulation
Spectrum Spectrum
Analog system
usually needs
D/U > 40 dB
D/U > 20 dB
Error Free Desired
Undesired
Desired
Undesired
* D/U ratio: Desired/Undesired ratio
The Sony DWX series of digital wireless microphones employing the WiDIF-HP format provides interference
rejection that surpasses conventional analog systems by 20 dB or more (more than 10 times better in terms of
reception voltage level), resulting in improved operation stability.
Technology

12 Key Features of WiDIF-HP
Simultaneous Multi-Channel Operation
Why are digital wireless systems advantageous to simultaneous multi-channel operation?
In an analog system, the D/U (Desired/Undesired) signal ratio will be the S/N ratio of the demodulated audio
signal. The higher the undesired signal level, the higher the noise will be in the modulated signal. Typically,
analog systems require a D/U signal ratio of 40 dB or more.
In the Sony digital wireless system on the other hand, an error does not occur provided the D/U signal ratio
is 20 dB or more. Therefore sound quality will not be impaired as long as this condition is met. The digital
wireless system provides interference rejection that surpasses conventional analog systems by 20 dB or more,
and is therefore much less prone to problems caused by intermodulation and is more efficient in handling
frequencies within a limited frequency range.
Application Example: Reality TV Show Production
Frequency environment: Clear channels are TV33,TV42, and TV55 only.
Third-order intermodulation signals will occur
at 639.500 MHz and 641.000 MHz
CH1: 640.000 MHz
CH2: 640.500 MHz
RF spectrum
Frequency
Frequency
CH 1 & 2CH 1 & 2CH 2 & 3CH 1 & 3
CH 1 CH 2
CH 1 CH 2 CH 3
Third-order intermodulation signals
Wireless channel cannot be allocated
due to the intermodulation noise
TV42 4ch TV55 2ch
TV42 4ch TV55 2ch
TV33 4ch TV55 2ch
TV33 4ch TV55 2ch
Total 24 channels
Intermodulation free
special channel allocation
4-camcorder system
ANALOG TV33: 8ch, TV42: 8ch, TV55: 8ch
CH 4CH 2 CH 3CH 1 CH 12CH 10 CH 11CH 9
TV42 4ch TV55 2ch
TV42 4ch TV55 2ch
TV42 4ch TV55 2ch
TV33 4ch TV55 2ch
TV33 4ch TV55 2ch
TV33 4ch TV55 2ch
...
Total 36 channels
Equally spaced easy
channel allocation
6-camcorder system
DIGITAL TV33: 12ch, TV42: 12ch, TV55: 12ch
RF and third-order intermodulation
The RF related circuit design is an important aspect for realizing multi-channel operation. In wireless systems
with multiple channels, the intermodulation that is generated in the RF amplifier of the transmitter/receiver
often causes interference between the wireless channels. The RF block of an analog wireless system must be
designed carefully to deal with intermodulation. However, intermodulation cannot be eliminated completely,
either in an analog or digital system, as long as the RF part is composed of analog circuits.
With WiDIF-HP, the number of transmitters that can be used within the same band frequency is 1.5 times that of
an analog system, allowing for greater operability.
Com
Comm
Technology

13
Key Features of WiDIF-HP
audio
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etely,
that of
180m
30m
Digital wireless system operation
area (radius 60 meters)
300m
180m
Analog wireless system operation
area (radius 60 meters)
Common Frequency Reuse Configuration
In a digital wireless system, the minimum distance for reusing a common frequency is one sixth of an analog
setup. Compared to an analog system or a mixed analog/digital system, the digital wireless system can
be configured for a three times bigger operation area which facilitates efficient use of space in convention
centers for trade fairs and similar applications.
Common frequency reuse area distances
In digital wireless systems, the minimum distance is one sixth of an analog wireless or mixed analog/digital
setup. (With 10 mW output)
Analog wireless system, or mixed analog/
digital system
Minimum area distance: 180 meters
Digital wireless system
Minimum area distance: only 30 meters
Technology

14 Key Features of WiDIF-HP
Analog wireless system Digital wireless system
(WiDIF-HP)
FM-modulated
audio signal
Digitally modulated
coded audio
The risk of being intercepted by a
receiver of an outside system.
For condential communication,
WiDIF-HP provides two
communication modes:
1) Secure key mode
2) Password mode
Encrypted Transmission
In an analog system, the frequency-modulated (FM) audio signal can be received by anyone with the right
equipment and some technical knowledge. By contrast, a digital system allows the use of encryption to make
the wireless transmission secure. The signals cannot be decoded by a conventional wideband receiver.
This makes it easy to maintain confidentiality for conference rooms, live performance venues and other
applications where strong measures against interception are required.
The Sony digital system offers the choice between a secure mode using encryption keys, and a password
mode where a secure group comprising multiple transmitters and receivers can be created.
Secure key mode
This is a one-on-one arrangement where the encryption key generated by the transmitter is used for a single
transmitter/receiver pair only. The mode provides highly secure strong encryption.
Password mode
A password that can be freely specified is set for a number of transmitters and receivers, and only
equipment using that password can communicate with each other. Connection to equipment without the
password set is blocked, resulting in secure operation.
Application example: broadcast station
All pieces of equipment used by the station are assigned the same password, allowing secure operation by
staff without having to worry about complicated setup procedures or information leaks. It is also possible to
broadcast audio from one transmitter to multiple receivers. Besides applications in the broadcasting sector,
this kind of system is also suitable for example for government and other public offices where information must
be transmitted securely.
Notes
Encrypted transmission does not guarantee 100% confidentiality.
Changing the password on a regular basis is recommended.
Meta
Using
Metad
Technology

15
Key Features of WiDIF-HP
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Metadata Transmission
Along with the audio signal, comprehensive information about the transmitter is sent as metadata, including
audio input level, battery status, attenuator setting, etc. This enhances operation convenience, since the
transmitter status can be monitored in any of the following ways:
On the display of the receiver
In the viewfinder of the camcorder (when using a slot-mounted camcorder; receiver information can also
be monitored)
In Wireless Studio (a dedicated software application supplied with the Digital Wireless Receiver DWR-R01D)
Send comprehensive information
about transmitter
Transmitter
RF signals
Metadata
Receiver
Receiver uses data to display
detailed status information
Example for transmitted information (with DWT-B01)
Transmitter name
Battery status
RF power setting
Attenuator level setting
Low-cut filter setting
Continuous operation time
Using metadata
Metadata can be used for setup of other connected equipment.
Combined delay time of transmitter and receiver can be sent to camcorder for video synchronization, etc.
Metadata transmission principle
Normal information display Transmitter status display example
Display
switching
Audio level meter
Transmission battery
indication
RF level meter Model name Input level Attenuator level Transmission battery
indication
QL meter
Audio input level meter
Wireless remote control
condition indication
Transmission
power indication
Technology

16 WiDIF-HP Precautions
Lavalier microphone
Detection
Mobile phone signals
2.4G Wifi
RFI (Radio Frequency Interference) Noise
WiDIF-HP performs cyclic packet transmissions similarly to mobile phones, computers, and other digital
transmission equipment.
The nonlinear devices (FETs, etc.) in the condenser microphone pick up these other RF signals, and RFI noise
may occur according to the packet format as a result. Countermeasures are therefore required. This applies in
particular to DWX transmitters set to high output (50 mW).
The RF signals emitted by

WiDIF-HP may affect the lavalier
microphone.
RFI noise may also occur due to RF signals emitted by mobile
phones, computers, and other digital equipment.
Noise countermeasures
Use cables with effective shielding.
Take measures to implement RF immunity of microphone unit.
Use lavalier microphones designed to be used together with digital wireless equipment that include RFI noise
countermeasures.
Notes
Dynamic microphones are typically not subject to exhibiting this type of RFI noise.

Sony professional lavalier and shotgun microphones with a suffix /9X in the model name, such as the
ECM-77BC/9X, are certified by Sony to be suitable for use with the DWX digital wireless system. Other Sony
professional microphones without a /9X in the model name may not be suitable for use with the DWX
system.
Microphones from Sanken, DPA, or Countryman include models that do not produce RFI noise and can
therefore be used with the DWX system. For details on compatible models, contact the manufacturer of
each microphone.
WiDIF-HP Precautions
This section provides information about various points to keep in mind when operating a digital wireless system.
For details, see “UHF System Configuration” (page 38).
Soun
At
pro
sam
cu
Technology

17
WiDIF-HP Precautions
noise
plies in
bile
FI noise
ony
an
of
This graph shows a conceptual rendering.
It does not represent actual measurement
values.
Digital
Analog
Distance
Field strength
Audio
dropout
Noise Sound quality
Sound Quality Degradation under Weak Field Conditions — Analog and Digital Propagation
Provided that the transmitter power is the same, the signal level at the receiver at a given distance will be the
same for a digital wireless and analog wireless system. This means that both systems can be said to have a
service area of the same size.
However, as explained in the preceding sections, the audio quality degradation behavior when field strength
becomes low is significantly different for digital wireless and analog wireless.
When compared at an equal transmitter power level, the following differences will occur as correlated to the
reception level.
There will be an area where 1) digital wireless retains high sound quality, 2) analog wireless suffers from

deteriorated audio S/N ratio.
There will be an area where 1) digital wireless starts to exhibit intermittent muting, 2) analog wireless has
lower S/N ratio but sound remains audible.
The differences in sound quality degradation under weak field conditions may be experienced as a subjective
difference in service area size.
With WiDIF-HP, error processing has been optimized for a digital wireless system where intermittent muting
increases as the signal gets weaker. Operation patterns should be decided based on application
requirements and an evaluation of characteristics at the service area limit.
Because WiDIF-HP is tuned to maintain voice clarity as much as possible even when errors occur, evaluation
of error rates within the service area should be done using the Quality Level (QL) meter on the display of the
receiver or of the Wireless Studio application. The QL meter allows observation of transmission quality changes
over time.
At the same power, the
propagation reach is the
same, but behavior in the
cut-off region is different.
Technology

18 WiDIF-HP Precautions
300m
180m
180m
180m
30m
Digital wireless system operation
area (radius 60 meters)
Analog wireless system operation
area (radius 60 meters)
Mixed Digital/Analog Systems
When digital wireless and analog wireless systems are used together, take the following points into
consideration.
Channel plan limitations
In a mixed digital/analog wireless system, channel plans designed for analog systems must be used.
Equal channel spacing applies only to fully digital wireless systems. Equal channel spacing is not available
for analog wireless systems.
Notes
Refer to Sony digital wireless system frequency lists for further details on pre-programmed groups of

frequencies built into every DWX transmitter and receiver.
Sony’s built-in pre-programmed frequency groups provide 500 kHz channel spacing for digital channel
plans D1-D9 along with analog channel plans 01-09 (containing irregular channel spacing) to ensure
compatibility with Sony analog wireless system channel plans.
Common frequency interference precaution
When operating adjacent to an analog wireless system, the minimum distance for analog wireless systems
must be observed.
Analog wireless system, or mixed analog/
digital system
Digital wireless system only
Syste
Analo
Digita
Analo
Digita
Technology

19
WiDIF-HP Precautions
eration
lable
nel
re
ms
System Behavior in Case of Interference
To understand how analog and digital systems can have a mutual effect on each other in actual operation,
it is important to consider the way in which the demodulated audio signal deteriorates when interference
occurs.
Analog Analog
The stronger the interference, the higher the level of unwanted signals mixed to the audio.
This is heard as so-called beat noise, a chirping or squealing sound.
Digital Analog
As interference gets stronger, a “digital type” hiss noise will gradually be mixed to the audio of the desired
signal.
There is no beat noise typical of analog to analog interference. If the receiver has a function for detecting
noise and muting the output, the audio will eventually be cut off as the interference noise increases.
Analog Digital
Behavior is the same as for digital to digital interference.
As interference gets stronger, errors will cause intermittent audio degradation.
When interference increases further, intermittent muting will occur more frequently.
Finally, the output will be completely muted.
Digital Digital
Behavior is the same as for analog to digital interference.
As interference gets stronger, errors will cause intermittent audio degradation.
When interference increases further, intermittent muting will occur more frequently.
Finally, the output will be completely muted.
With WiDIF-HP, sound quality will not be impaired as long as the D/U signal ratio is 20 dB or more. Unlike with
analog systems, there will also be no loud beat noise in case of interference.
The rapid transition characteristics from high sound quality to muting when interference increases are the
same as for weak field reception. If the same channel must be used in adjacent areas, suitable measures
should be taken to ensure a D/U signal ratio of at least 20 dB. Such measures include maintaining minimum
distances, making appropriate settings for transmission power, and appropriate antenna installation design
and settings. The RF indicator and QL meter functions of the receiver should be used to determine the final
channel plan and equipment settings.
Technology

20 Cross Remote Technology
Cross Remote is a system that allows transmitters to be monitored and controlled from a receiver and the Wireless
Studio control software installed on a computer connected to the receiver.
How Cross Remote works
Cross Remote Outline
DWR-R01D
AN-01
PC
DWM-01
DWT-B01
RMU-01
LAN Cable
Metadata transmitted via WiDIF-HP
Status information for each transmitter is sent on
respective UHF frequency
If metadata monitor function only is used, service
area is equal to UHF (sound) range
Control data sent via 2.4 GHz
NT mode
RMU-01 transmits control information for all
transmitters on network (max. 82 units)
Up to nine RMU-01 units can be used, to enlarge
service area
*Internal 2.4 GHz antenna of receiver cannot be used
ST mode
Control information is sent to currently received
transmitters (max. 2) via internal 2.4 GHz antenna
Both modes
Transmitter identifies received control data by ID
Control results are returned as WiDIF-HP metadata
Area where UHF and 2.4 GHz communication
overlaps is service area for control functions
2.4 GHz communication range has a radius of about
10 meters in a space with good line of sight
In sleep mode, WiDIF-HP is not received.Two-way
2.4 GHz communication is used for monitoring
Cross Remote protocol is expanded over
Ethernet network
Protocol is TCP/IP based
100Base-TX/10Base-T network equipment can
be used
RMU-01 used for 2.4 GHz antenna expansion
Monitoring and control with
Wireless Studio
Allows integrated system
management
Up to 6 Windows PCs are supported
Monitoring and control possible at receiver
Covers transmitters currently being received
ST mode uses the internal 2.4 GHz antenna
* Used in NT mode only.
UHF
2.4 GHz
BNC Cable
Network HUB
Cross Remote transmits the data described below, allowing remote monitoring and operation of the transmitter
from the receiver side.
*When using the DWR-S01D as receiver, the RMU-01 or a computer cannot be used.
Compared to analog wireless systems, the DWX series allows more channels to be operated simultaneously.
The Cross Remote system for remote control of transmitters from a receiver was developed to facilitate setup
and operation of large wireless microphone configurations.
Cross Remote uses an independent 2.4 GHz RF carrier (compliant with the IEEE 802.15.4 standard) to
implement remote control that is separate from the UHF main link. This allows simultaneous audio transmission
and remote control operation without affecting the battery life, audio quality and other features of the wireless
microphone system. Attenuator and low-cut filter settings as well as power, frequency and almost all other
transmitter settings can be controlled remotely. Even when the transmitter is worn concealed on the body,
Cross Remote makes it easy to change settings remotely.
Cross Remote Technology
2.4 G
Why
IEEE80
Technology