| MTR-90III Analog Multitrack Tape Recorder |
| This product has been discontinued. |
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Specifications
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Tape Transport |
| Tape Width & Track | 2 inches, 24 tracks |
| Heads | Plug-in head blocks with full access to independent head azimuth adjustment |
| Motors | 1 DC capstan motor, 2 fully servoed DC reel motors |
| Reel Size | Up to 14-inch diameter (35.63 cm). NAB hub with reel size auto sensing |
| Tape Speeds | 30 & 15 ips (76.2 & 38.1 cm/s) (or 15 & 7.5 ips (38.1 & 19.05 cm/s), manufactured to order) |
| Tape Speed Accuracy | Less than ±0.1% |
| Tape Speed Deviation | Within 0.05% (from beginning to end of reel) |
| Pitch Control | ±20% continuously variable control, % or ips readout with 0.01% precision |
Wow & Flutter
(Peak wtd per DIN 45507) | 30 ips = ±0.04%
15 ips = ±0.05%
7.5 ips = ±0.08% |
Start & Stop Time
(14" reels) | 30 ips = max. 1.0 s
15 ips = max. 0.6 s
7.5 ips = 0.5 s |
| Drive System | Pinch-Roller-less direct drive capstan system with ±20% speed control. Constant tension servo-controlled reel motors. |
| Cue Control | Cue knob for variable speed tape winding (bidirectional) proportional to knob rotating; button also defeats tape lifters in Fast Wind and Rewind modes. |
| Tape Time Counter | Six-digit LED readout from tachometer/logic measurement circuit; indicates hours, minutes, seconds, and tenths of seconds. |
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Electronics (measured with AMPEX #456 tape) |
| Line Input | Transformerless active balanced (Floating transformers are optional)
Input Impedance: 10 kΩ (20 Hz to 20 kHz)
Reference Level: +4 dBu
Connector: XL-3 type (female) |
| Line Output | Transformerless active balanced (Floating transformers are optional), Balanced/Unbalanced switchable
Output Impedance: 5Ω (20 Hz to 20 kHz)
Load Impedance: min. 150Ω
Reference Level: +4 dBu
Connector: XL-3 type (male) |
| Clipping (amplifier) | +28 dBu |
| Headroom | 24 dB |
| Equalization | AES (30 ips), NAB, or IEC (15 & 7.5 ips) switchable. Record EQ to be specified at time of order. |
| Punch-In/Punch-Out | Gapless and noiseless inserts with automatic monitor switching. |
| Frequency Response (Rec/Rep) | 50 Hz to 22 kHz +2, -3 dB (0 VU, 30 ips)
30 Hz to 20 kHz +2, -3 dB (0 VU, 15 ips)
30 Hz to 16 kHz +2, -3 dB (-10 VU, 7.5 ips) |
| Frequency Response (Rec/Sel-Rep) | 50 Hz to 16 kHz±3 dB (0 VU, 30 ips)
30 Hz to 16 kHz±3 dB (0 VU, 15 ips)
30 Hz to 12 kHz±3 dB (-10 VU, 7.5 ips) |
| Distortion (THD) | Less than 0.5% (@ 1 kHz, 320 nWb/m) |
| Crosstalk (1 kHz) | min. 55 dB |
| Crosstalk (200 Hz to 16 kHz) | min. 43 dB |
| Erase Efficiency | Better than 75 dB (@ 1 kHz) |
Signal-to-Noise Ratio
(@ 1040 nWb/m, UNWTD,
with 30 Hz to 18 kHz BPF) | AES 30 ips = 70 dB
IEC 15 ips = 69 dB, IEC 7.5 ips = 66 dB
NAB 15 ips = 67 dB, NAB 7.5 ips = 69 dB |
| Reference Fluxivity | NAB = 250 nWb/m, IEC = "320" nWb/m. Figures enclosed in quotations (" ") represent values for open circuit fluxivity |
| Bias Frequency | 257 kHz |
| Erase Frequency | 86 kHz |
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Physical |
| Weight | approx. 200 kg |
| Dimensions (H x W x D) | 1,085 x 770 x 620 mm |
| Finish | Light beige and gray pebble finished steel chassis, black cover panels. |
| Power Supply Requirement | 100/117/220/240 V ±10% Single phase AC, 50/60 Hz |
| Power Consumption | 1 kVA (norm.), 2,000 VA (max.) |
| Operating Environment | Temperature +5 to +40°C, Relative Humidity 20 to 80% |
| Storage Environment | Temperature -20 to +45°C, Relative Humidity 10 to 80% |
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Accessories |
| Standard Accessories | CB-147-S remote controller
Fuse
VU meter lamp
Switch lamp
Frame bumper
Power supply cable
3 P plug cord
Amplifier control cables
Deck control cable
Dummy EXT connector
Operation and maintenance manual |
| Optional Accessories | CB-120S auto locator
CB-120BS auto locator
CB-148-S auto locator
EC-101-S plug-in synchronizer
CB-121-S synchronizer remote controller [for EC-101]
EC-102-S chase synchronizer
CB-131-S synchronizer remote controller [for EC-102]
ZA-55S capstan clock pre-scaller
ZA-52J locator/remote stand
ZA-54L large diameter caster [d = 125 mm]
ZA-53C input transformer assy
ZA-53D output transformer assy
PB-78A externder PCB
ZA-54D spare PCB kit |
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Specifications are subject to change without notice or obligation.
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