• Detailed information on DRM Test Equipment DT 230
  
  (PDF, 285 kB)

•  Information sheet on Transport Case for the DT series
  
  (PDF, 612 kB)

• Stand-alone unit
• Easy to use due to comfortable LCD menus
• Software update via built-in DVD drive
• Full remote control by remote PC via Ethernet
• 10 MHz reference input
• Available with various options
• Upgrade of options possible
• Availability: three months after receipt of order

• DRM signal playback for
  • Demonstration purposes
  • Transmitter tests
  • Receiver tests
• DRM signal recorder for
  • Generation of real-world patterns
  • Recording of signals for further analysis
• DRM signal playback and channel simulator for
  • Development of DRM front-ends
  • Development of DRM baseband decoders
• DRM signal playback, channel simulator and RSCI (Receiver Status and Control Interface) analyzer for
  • Performance tests of DRM receivers
• DRM real-time modulation for
  • Laboratory tests
  • Demonstrations

The following features are available as basic model (Basic Model B1):

Signal Playback

• Including 4 GB of pre-generated DRM files (about 400) on internal hard disk
• Playback of signals from
  • CD / DVD
  • USB stick
  • Internal hard disk
• Bandwidth of 48 kHz complex signals for analog output bandwidth 40 kHz within ±0.2 dB
• Output frequency range 100 kHz up to 27 MHz, better than 60 dB SFDR (spurious free dynamic range), fulfills DRM spectrum mask
• Output power up to -10 dBm sine wave
• Built-in hardware attenuator
• Output level accuracy better than ±0.5 dB

Signal Recorder

• Recording of 48 kHz complex signals with analog input bandwidth 40 kHz within ±0.2 dB
• Input level accuracy better than ±0.2 dB
• Input full-scale at 10 dBm sine

The following features are available as option:

• According to Watterson channel model as defined in ITU-R F.1487
• Bandwidth min. 40 kHz
• 4 Paths, each path features
  • Relative attenuation up to 20 dB
  • Multipath delay up to 100 ms
  • Doppler shift up to ±500 Hz
  • Doppler spread up to 20 Hz
• Adjacent or on-channel DRM or AM interferer within bandwidth of channel simulator min. 40 kHz and a relative signal attenuation from -50 to +20 dB
• AWGN noise generator
• Attenuator 0 to 80 dB

Channel Simulator Dynamic Profile (Option O2, requires Option O1)

• All parameters of the Channel Simulator can be changed dynamically by user-defined profiles
• Synchronous update of all values every 100 ms, linear interpolation between sampling points
• Freely configurable impulse interferer simulation with configurable power, length, repetition time and polarity

Receiver Performance Measurement (Option O3)

• BER analyzer based on evaluation of RSCI (Receiver Status and Control Interface) input, according ETSI TS 102 349 V1.2.1 via RS232
• Remote control by Ethernet connection to external PC
• Controlled by Perl-based scripts
• Script-based testing with full control over all settings of B1 and – if available – O1 and O2
• Automatic test report generation using LaTeX
• Generation of plots using GNU plot

• Generation of a RF signal from a MDI data stream or file
• MDI input according to ETSI TS 102 820 V1.2.1
• Real-time input via Ethernet, UDP/IP unicast and multicast
• Monitoring of input buffer level
• Synchronous modulation possible with reference frequency of 10 MHz
• No SFN synchronization possible
• Playback of pre-generated MDI files from internal hard disc
• Fully interoperable with all Channel Simulator Options (O1 and O2)

DRM modulation:

• Modes A, B, C and D
• 4.5, 5, 9, 10, 18 and 20 kHz
• QAM 4, 16 and 64
• Standard and hierarchical modulation
• Short and long interleaving
• All code rates
• Equal and unequal error protection
  

Option O4 must not be used for regular broadcasting.

For dedicated broadcasing equipment please refer to: www.transradio.de

Modulator reactions to DRM multiplex-reconfiguration:

There are two types of reconfiguration: a service reconfiguration and a channel reconfiguration.

• A service reconfiguration is one in which the data capacity of the MSC is reallocated between services. This happens when the number of services in the multiplex is changed or the size of data streams is changed.
• A channel reconfiguration is one in which the following FAC channel parameters are altered: spectrum occupancy, interleaver depth, MSC mode and when the robustness mode is changed.

All reconfigurations are signalled in advance. Some reconfigurations can be handled without audio interruption, others cannot.

The following list shows the different reconfigurations and their implications on the continuity of the audio output. The SDC data entity 10 (future FAC parameters) and other SDC data entities giving parameters for the time after the reconfiguration are encoded to make the receiver aware of the type of reconfiguration. The FAC reconfiguration index is set to determine the point of time of the reconfiguration.

• Channel reconfigurations: spectrum occupancy, robustness mode, interleaver depth
  • intended behaviour: audio interruption shall not exceed acquisition time
  • theory: reconfiguration without audio interruption is not possible
  • modulators MB 1.0.25, 1.0.28 and 1.0.29: reconfiguration without audio interruption is not possible
• Service reconfigurations: MSC mode, SDC mode, SDC type 0 - protection level, SDC type 0 - data length, SDC type 9 - SBR flag, SDC type 9 - audio mode, audio data rate
  • intended behaviour: no audio interruption
  • theory: reconfiguration without audio interruption is possible
  • modulator MB 1.0.29: reconfiguration without audio interruption is possible
  • modulators MB 1.0.25 and 1.0.28: reconfiguration without audio interruption is possible if short interleaving is used but dependent on the specific SDC content
  • modulators MB 1.0.25 and 1.0.28: reconfiguration without audio interruption is not possible if long interleaving is used
• Service reconfigurations: SDC type 9 - audio coding
  • intended behaviour: audio interruption shall be less than 400 ms
  • theory: audio interruption because of reconfiguration is dependent on audio decoder implementation
  • modulator MB 1.0.29: audio interruption because of reconfiguration is dependent on audio decoder implementation
  • modulator MB 1.0.25 and 1.0.28: audio interruption because of reconfiguration is dependent on audio decoder implementation and the specific SDC content
  • modulator MB 1.0.29 and 1.0.28: reconfiguration without audio interruption is not possible if long interleaving is used
• Service reconfigurations: SDC type 2 - conditional access, SDC type 5 - application information
  • intended behaviour: no long audio interruption
  • theory: reconfiguration without audio interruption is possible
  • modulators MB 1.0.25, 1.0.28 and 1.0.29: behaviour is not tested for these types of reconfiguration

• Via graphical user interface
• Via web interface

• Size:
        Width 43.2 cm
        Height 13.3 cm, 14.5 cm with pedestals
        Depth 40.6 cm, 46 cm with connectors
• Weight 10 kg
• 19“ rack mounting possible with mounting rails supplied

• Temperature range: 0 – 40 °C
• Humidity: 20 – 60 % non-condensing
• Voltage range: 115 – 230 V, 50 – 60 Hz AC

• Latest user manual available on E-Mail senden
• Support via e-mail: E-Mail senden
• Newsletter via e-mail. For subscription please see below
• Software updates via e-mail

Price list on E-Mail senden

A mail reflector has been set up for communicating up-to-date news on DRM equipment. Everyone interested may subscribe to fhg-swr by sending an E-Mail as follows:

To: majordomo@iis.fraunhofer.de
Subject: No Subject
Body: subscribe fhg-swr

For other DRM products and DRM links please visit also
our DRM page.