Digirator DR2 Digital Audio Signal Generator

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Description

Digirator DR2 Digital Audio Signal Generator

 

The Digirator DR2 is a reference-grade digital audio signal generator with transformer-balanced AES3, S/PDIF, TOSLINK and ADAT outputs. The generator offers a wide range of test signals like sine, pink noise, white noise, polarity, delay, chirp and sweep.

The DR2 further offers a set of surround-sound test sequences for the verification and adjustment of professional digital environments including Dolby Digital, Dolby E and DTS installations. The internal low-jitter clock generator can be synchronized to AES3, DARS, Word Clock and Video signals. Measurement of channel transparency, channel propagation delay and sample frequency is supported.

FEATURES

 

Sine Wave, Noise, Polarity, Delay, Chirp and Sweep
A full range of digital audio test signals for maintenance, repair and calibration of professional audio equipment is generated. User test signals may be stored as uncompressed WAV-files in the DR2 memory.
Multi Format SYNC Input
The DR2 accepts AES3, DARS, Word Clock and Video Black Burst (PAL and NTSC) synchronization signals. The input impedance of the sync input may be switched between 75 Ohm, 110 Ohm and High Z.
Channel Status Monitoring
Channel status information can be generated in professional and consumer format and the most important parameters may be manipulated manually. Display of incoming channel status data is also supported.
Store Preset Configurations
Up to 10 complete instrument configurations can be stored in the internal flash memory and reloaded for repetitive tasks. The saved settings may also be transferred to other DR2 instruments.
Dolby Digital, Dolby E and DTS
The DR2 wave file player can play back multi-channel bit stream files. A set of 5.1 test sequences for the verification and optimization of surround sound equipment and installations is stored on the unit’s flash disc.
Channel Transparency Check
The DR2 tests whether a transmission channel is transparent for nonlinear PCM signals and indicates if Dolby E, Dolby Digital and/or DTS bit streams can pass. This test is also suitable for any digital audio recording device.
Channel Delay Measurement
The propagation delay between any DR2 digital audio output and the XLR sync input (which accepts AES3 signals) may be measured and displayed in seconds or video frames.

SPECIFICATIONS

 

Format
Consumer/Professional, up to 24 bit audio
Sampling Frequencies / Outputs
XLR, RCA: 32, 44.1, 48, 88.2, 96, 176.4, 192 kHz
Optical: up to 96 kHz
ADAT: up to 48 kHz
Accuracy: ± 2.5 ppm
Outputs
• AES3 (110 ohms) XLR
• S/PDIF (75 ohms) RCA
• AES3id (75 ohms) with RCA to BNC adapter
• TOSLINK: Stereo and ADAT
Inputs
XLR Sync. input for:
• AES3, DARS
• Video (NTSC, PAL)
• Word Clock using BNC to XLR adapter
Linear PCM Signals
Sine, Polarity Test Signal, Delay Test Signal,
Pink Noise (crest factor = 4.42),
White Noise (crest factor = 3.47),
Playback of Wave Files
Non-linear multichannel signals
A comprehensive library of pre-encoded surround sound signals is available in the following formats:
• Dolby Digital
• Dolby E
• Dolby ProLogic II
• DTS
Wave File Format
Sampling frequency: 48 kHz
Resolution: 16, 20, 24 Bit, Mono + Stereo
Frequency Settings
Range: 10 Hz - 20 kHz
Step width: min 1 digit steps
Accuracy: 0.01%
Stepped Sweep Function
Frequency range: selectable, 10 Hz - 20 kHz
Step width: 1/1, 1/3, 1/6, 1/12 octave
Sweep speed: selectable, 0.5 - 5 s / step
Gliding Sweep (Chirp) Function
Frequency range: selectable, 20 Hz - 20 kHz
Increment: linear / logarithmic
Chirp speed: 1.0 - 39 seconds per sweep
Level Units
dBFS, %
Output Level Range
-100 dBFS to 0 dBFS
Distortion THD+N
of the synthesized sine signal:
-138 dB (22 Hz - 22 kHz, AVG, @ 1 kHz, typical)
USB Functionality• for firmware update
• mass storage device
Flash Memory• 512 MByte
• for storing wave files and configurations
DisplayGraphical, with back illumination
Auto-Power-Off10, 30, 60 minutes or OFF
Batteries• 3 x AA Alkaline dry cells or rechargeable equivalents
• Battery life typ. 10 hours (continuous)
Temperature Range0° to 45° C (32° to 113° F)
Humidity< 90% rel. humidity, non-condensing
Protection RatingIP51
Dimensions (LxWxH)152 x 81 x 43 mm (incl. protective shock jacket)
Weight310 g (11 oz.) incl. batteries