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Digital Transfer between SIGNAL and DAT Recorders

Application Note 10 7

Performance Specifications

DAT Recorders

One of the attractions of DAT recorders is their superior performance relative to analog

recorders. For interest, following are performance specifications for a few DAT recorders

and a studio-quality Studer analog recorder. THD = total harmonic distortion. Values are

from manufacturer's specifications except where noted as measured by "(meas)".

SONY SONY Panasonic Studer

TCD-D10

PCM-R500 SV-3800 A810 @ 15 ips

Record mode Digital Digital Digital Analog

Recorder type Portable Studio Studio Studio

Freq response 20-22 KHz, 20-20 KHz, 10-20 KHz, 30-18 KHz,

±1 db ±0.5 db ±0.5 db ± 1 db

Signal-to-noise > 85 db > 90 db > 92 db 64 db (meas)

THD -64 db (spec) -66 db -70 db at +4 dBu -57 db (meas)

-81 db (meas) -83 db at +22 dBu

The SONY TCD-D10 portable DAT recorder (cost about $800-1000) has become popular for

field use, and its performance was characterized. Maximum input voltage =

±3.15 Volts,

beyond which input signals are clipped. Measured THD is better than -81 db.

S/PDIF Board

The Card-D S/PDIF board was tested at the Borror Laboratory of Bioacoustics (BLB) at The

Ohio State University. A Wave file containing a sine signal was created in SIGNAL,

transferred digitally to the DAT, then transferred digitally back from the DAT to SIGNAL

and analyzed for distortion. As expected, there was no detectable degradation in the returned

signal.

8-30-98

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Engineering Design NIDisk Betriebsanweisung Seite 23