Scoopman - Digital Micro Recorder NT-1

Sony Scoopman NT-1 is the first digital stereo microcassette voice recorder.

The recording and playback sytem is similar to that of video tape recorders, using helical scanning. The head does not precisely follow the tracks but performs more than one pass per track, storing data in memory and reconstructing the audio information after several passes.

The Scoopman NT-1 uses special "stamp-sized" micro cassettes (NT-C) with 60, 90 and 120 min. recording time. In 1994 they were the world’s smallest tapes for digital recording, affording them an entry in the "Guinness book 2".

Audio is recorded with a quality close to that of the CD: 32 kHz sampling, 12 bit non-linear quantization, corresponding to a 17 bit linear quantization. A digital AGC adjusts the recording level automatically or manually.

Input for external microphone, output for headphones.
Line-In and Line-Out are available using the provided NTU-2 adapter.

NT-1 has a clock with auto calendar function up to the year 2099. Time stamps are recorded on tracks.

Specifications:

Format: NT format
Tape: digital micro tape (NTC cassette tape), metal evaporated tape
Recording system: helical scan 2 heads, digital recording
Recording head: 3 heads
Recording time: 2x 30, 2x 45, 2x 60 minutes
Tape speed: approx. 6.35 mm/second
Drum rotation: 3000 rpm
Error correction: cross-interleaving code
Track pitch: approx. 9.8 µm
Sampling frequency: 32 kHz
Modulation system: LDM-2
Number of channels: 2-channel, stereo
Quantization: 12-bit non-linear (equivalent to 17 bits)
Frequency response: 10 Hz - 14'500 Hz (+1, -3dB)
Signal-to-noise ratio: > 80 dB (1 kHz, IHF-A, 20 kHz LPF, Line In)
Dynamic range: > 80 dB (1 kHz, IHF-A, 20 kHz LPF, Line In)
Total harmonic distortion: < 0.08%
Wow and flutter: below measurable limit (< 0.001%) W.PEAK
Tape Transport Mechanism Type: MN-1-66
Maximum recording time: 120 minutes (2x 60 min, double side)

Mic Input:
Jack type: stereo mini-jack
Rated input level: 1.38 mV
Minimum input level: 0.55 mV

Line In:
Jack type: stereo mini-jack
Rated input level: 160 mV
Minimum input level: 64 mV

Lithium battery life CR-1220 cell: approx. 1 year
Power consumption: approx. 300 mW

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