Otari – MTR-15

Product Description

Otari – MTR-15

Features

  • Fully Automated Audio Alignment: The Auto Alignment system permits Fully Automatic, Partially Automatic, and Manual alignment of Record and Reproduce parameters such as Gain, High-, Mid-, and Low-Frequency Equalizations, Phase Compensation, and Bias Level. Alignment data for four different tape formulations at each speed and equalization setting can be stored and “kept alive” by a long-life lithium battery after the power is turned off. A built-in digitally controlled oscillator speeds testing and adjustment. Frequencies and levels of test signals are automatically selected to match the tape speed and alignment procedure being performed. The oscillator frequencies and levels can easily be changed from the factory settings to suit unique requirements. Manual adjustment of the record circuit can be performed with the built-in oscillator or with an external oscillator.
  • Transport: The MTR-15 accepts reels of up to 12.5 inches in diameter with EIA, NAB and DIN (CCIR) hubs. An optical sensor signals reel size to a “pulse width modulation” reel drive system which adjusts transport ballistics accordingly. Optical sensors on the tension arms signal the reel servo to maintain constant tape tension in all modes (except Edit and Unload). Thus, constant tension is maintained even when the tape is “rocked” by hand in Stop mode. The deck plate is made of one inch thick diecast aluminum for stability, and is machined for precise mounting of all mechanical components. A Cue Wheel on the transport allows the user to vary tape speed in either direction at any speed including Fast Wind. In Shuttle mode tape speed increases with the amount the cue wheel is turned, and continues to “Shuttle” until the wheel is turned a similar distance in the opposite direction. Pressing STOP also ends shuttle winding. In Jog mode tape motion follows the pattern of Cue Wheel movement: when turned quickly the tape moves quickly, when the cue wheel stops the transport stops.
  • Special Features: Dolby HX Pro Head Room Extension* increases high frequency dynamic headroom, and thus the maximum output level. HX Pro accomplishes this by continuously monitoring high frequency content of the input signal and adjusting the record bias accordingly, without self biasing effects. HX pro is not noise reduction, and needs no decoding. The software program enables redefinition of many of the machines operating characteristics. For example, the arrangement of the Transport Control buttons can be changed by merely changing the settings (shown on the Alignment display) and then rearranging the button caps. In addition, the way each button functions can change. For example, Punch In/Out methods can be changed from the alignment panel. The MTR-15 wear meter allows easy maintenance scheduling. Total Power-on hours, total Head Wear hours, and total Lifter Wear hours, are measured and the values are stored in memory. Speed display is in inches per second (ips), centimeters per second (cps), or as a percent of the selected speed or the tape time. The tape time can be displayed as hours, minutes, seconds, and tenths of a second; or, as hours, minutes, seconds, and frames. The Tape Timer will display frames calculated from tachometer pulses. If the optional Time Code Modules are installed, the Timer will show SMPTE/EBU timecode when present. In addition, during emergencies the display shows error messages. X Pro Headroom Extension originated by Bang & Olufsen and manufactured under license from Dolby Licensing Corporation.
  • Built-in four point Locator includes: Three “one touch” Cue points, Search Zero, and Last Play Search (which returns the tape to the point at which the machine was last placed in Play mode). Repeat mode can perform continuous Play-Rewind-Play operation between any two selected Cue points an unlimited number of times.
  • There are several means of remote control. Each machine is equipped with a standard parallel interface for transport control, status tallies, tachometer pulses, and speed control signals. The MTR-15 can be linked with an optional remote transport controller, an auto locator, or a synchronizer. The following optional modules are available:
    Serial Control interface conforming to RS-232-C standard
    Serial Control interface conforming to RS-422-A standard
    Fader Start control
  • Input and Output level is selectable at +4 dBu or -16 dBu, (adjustable between +13 dBu and -20 dBu) and line output can be switched to balanced or unbalanced operation.
  • Four equalization and four crystal-locked speed settings: Equalization can be selected from AES, NAB, NAB-J, or IEC standards for each speed (except 30 ips for which there is only one standard: AES).

 

Specifications: 

Tape Transport

Tape Width, No. of Tracks MTR-15N (N-M): 1/4″ (6.3 mm) width tape, 2 track 2 channel NAB
MTR-15D (D-M): 1/4″ (6.3 mm) width tape, 2 track DIN stereo
MTR-15T (T-M): 1/4″ (6.3 mm) width tape, 3 track 2 channel NAB + timecode
Reel Size NAB 5 to 12.5″ (318 mm), EIA (Cine), DIN.  Maximum Tape length = 3750 ft (1143 m, tape thickness 50μm)
Tape Speed 30, 15, 7.5 and 3.75 ips
Tape Speed Accuracy Within ±0.06%
Deviation: max. 0.1%
Pitch Control Range ±50% from nominal speed (resolution 0.01% step)
VEM Speed Range +100 to +0%
External Sync Speed Range -50 to +100% from nominal speed (3.75, 7.5, 15 ips), -50 to +50% from nominal speed (30 ips)
Wow & Flutter
(DIN 45507 Peak WTD)
76.2 cm/s: Less than ±0.04%
38.1 cm/s: Less than ±0.05%
19.05 cm/s: Less than ±0.07%
9.53 cm/s: Less than ±0.10%
Start Time
(Play/Rec. Max. time to within twice specified wow & flutter. With 12.5″ reels.)
1/4″ 30 ips = max. 0.7 s
1/4″ 15 ips = max. 0.5 s
1/4″ 7.5 ips = max. 0.3 s
1/4″ 3.75 ips = max. 0.3 s
Stop Time

(with 10.5″ reels)

1/4″ 30 ips = max. 0.7 s
1/4″ 15 ips = max. 0.5 s
1/4″ 7.5 ips = max. 0.3 s
1/4″ 3.75 ips = max. 0.3 s
Fast Wind Time Less than 75 s (762 m tape), Less than 120 s (1143 m tape)
Heads MTR-15N: Erase = ferrite (2 mm trk width), Rec = hard permalloy, Repro = hard permalloy
MTR-15D: Erase = ferrite (2.75 mm trk width), Rec = hard permalloy, Repro = hard permalloy
MTR-15T: Erase = ferrite (2, 0.38 mm trk width), Rec = hard permalloy, Repro = hard permalloy, TC E/R/P = ferrite
Plug-in head blocks with independent adjustment of azimuth, zenith, and wrap
Stainless steel tape guide and scrape filter roller installed
Motors Capstan: Servo controlled quartz crystal controlled phase locked loop direct drive DC motor
Reel: DC closed-loop bi-directional servo

Electronics

Line Input Mode: Transformerless Active Balanced (transformer optional)
Input Impedance: 10 kΩ (20 Hz to 20 kHz. With optional transformer: 10 kΩ)
Norm. Input Level: +4 (0 to +13) dBu or -16 (-20 to -7) dBu (switchable/adjustable)
Max. Input Level: +30 dBu
Connector: XL-3 type, female
Timecode Input Mode: Transformerless Active Balanced
Input Impedance: 10 kΩ (20 Hz to 20 kHz)
Nom. Input Level: 2 Vp-p
Max. Input Level: 4 Vp-p
Min. Input Level: 0.2 Vp-p
Connector: XL-3 type , female
Line Output Mode: Transformerless Active Balanced (transformer optional)
Output Impedance: 5Ω (20 Hz to 20 kHz), 50Ω (With optional transformer)
Load Impedance: min. 200Ω
Nom. Output Level: +4 (0 to +13) dBu or -16 (-20 to -7) dBu (switchable/adjustable)
Max. Output Level: +26 dBu (200Ω bal. load), +21 dBu (200Ω unbal. load), +26 dBu (with optional transformer. Bal/Unbal. load)
Connector: XL-3 type, male
Timecode Output Mode: Transformerless Active Balanced
Output Impedance: 5Ω (20 Hz to 20 kHz)
Nom. Output Level: 2 Vp-p
Max. Output Level: 4 Vp-p
Connector: XL-3 type, male
Headphone Output Connector: 1/4″ stereo phone jack
Impedance: 8 to 10Ω
Equalization NAB, IEC (CCIR), NAB-J switchable
76.2 cm/s is fixed to AES
Reference Flux Level Audio Tracks: 185, 200, 250, “250”, “”320”, 370 and “510” nWb/m at 1 kHz
Timecode Track: 707 nWb/mp-p ±3 dB (250 nWb/m rms sinusoidal signal, recorded without EQ)
Frequency Response

(Rec/Rep)

76.2 cm/s: 40 Hz to 28 kHz±2 dB, 60 Hz to 20 kHz±1 dB
38.1 cm/s: 30 Hz to 22 kHz±2 dB, 40 Hz to 18 kHz±1 dB
19.05 cm/s: 20 Hz to 18 kHz±2 dB, 30 Hz to 15 kHz±1 dB
9.53 cm/s: 20 Hz to 10 kHz±2 dB, 30 Hz to 8 kHz±1 dB
Frequency Response

(Sel-Rep)

76.2 cm/s: 40 Hz to 20 kHz±3 dB
38.1 cm/s: 30 Hz to 12 kHz±3 dB
19.05 cm/s: 20 Hz to 5 kHz±3 dB
9.53 cm/s: 20 Hz to 2.5 kHz±3 dB
Signal-to-Noise Ratio

(UNWTD,

30 Hz to 18 kHz BPF)

MTR-15N, T
AES 76.2 cm/s, 1040 nWb/m = 71 dB
IEC 38.1 cm/s, 1040 nWb/m = 71 dB
IEC 19.05 cm/s, 1040 nWb/m = 68 dB
IEC 9.53 cm/s, 740 nWb/m = 64 dB
NAB 38.1 cm/s, 1040 nWb/m = 69 dB
NAB 19.05 cm/s, 1040 nWb/m = 71 dB
NAB 9.53 cm/s, 740 nWb/m = 64 dB
NAB-J 38.1 cm/s, 1040 nWb/m = 71 dB
MTR-15D
AES 76.2 cm/s, 1040 nWb/m = 72 dB
IEC 38.1 cm/s, 1040 nWb/m = 72 dB
IEC 19.05 cm/s, 1040 nWb/m = 69 dB
IEC 9.53 cm/s, 740 nWb/m = 65 dB
NAB 38.1 cm/s, 1040 nWb/m = 70 dB
NAB 19.05 cm/s, 1040 nWb/m = 72 dB
NAB 9.53 cm/s, 740 nWb/m = 65 dB
NAB-J 38.1 cm/s, 1040 nWb/m = 72 dB
Distortion

(Rec/Rep, 15ips, 1 kHz)

250 nWb/m: Less than 0.3%
“320” nWb/m: Less than 0.3%
“510” nWb/m: Less than 0.6%
1040 nWb/m: Less than 3%
Erase and Bias Frequency 192 kHz
Erase Efficiency
(1 kHz, 1040 nWb/m, 15 ips)
MTR-15N, T: min. 80 dB
MTR-15D: min. 75 dB
Crosstalk MTR-15N: min. 60 dB (between adjacent audio tracks)
MTR-15D: min. 50 dB (between adjacent audio tracks)
MTR-15T: min. 65 dB (from audio track to TC track)
MTR-15T: min. 75 dB (from TC track to audio track)
Test Oscillator Frequency 10 Hz to 25.5 kHz sine wave. Auto/Manual sweepable
TC Readable Speed 38.1 cm/s: up to 25x nom. playback speed
19.05 cm/s: up to 35x nom. playback speed

Miscellaneous

Power Supply Requirement 100, 117, 220, 240 VAC ±10%, single phase 50/60 Hz
Power Consumption

(MTR-15N)

Idle: 150 VA, Rec/Rep: 210 VA, Max.: 340 VA
Operating Environment Temperature: 5 to 40°C, Relative Humidity: 20 to 80%
Storage Environment Temperature: -20 to +45°C, Relative Humidity: 10 to 80%
Dimensions (WxDxH,mm) MTR-15N/T/D: 482 x 488 x 324
Weight MTR-15N/D: 46 kg
MTR-15T: 47 kg

 

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