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MMTS20 Stereo Encoder for Mini-Rack Modulators

MMTS20 Stereo Encoder for Mini-Rack Modulators
Rack Enclosure

The R.L. Drake MMTS20 Stereo Encoder is part of the Drake Mini-Rack family designed to optimize rack space. The MMTS20 is an MTS stereo encoder which accepts left and right audio inputs and generates a composite BTSC format stereo signal. The composite signal is applied to the audio input of a compatible audio/video modulator . The modular design permits convenient pairing with a mini-rack modulator such as the VMM600, VMM806, or VMM806AG in a multiple unit rack configuration.

  • High quality, economical MTS stereo encoder
  • Greater than 20dB stereo separation.
  • Convenient front panel audio level control and indicator permit setting of proper audio levels.
  • Front panel test tone switch allows easy calibration of stereo separation and minimizes installation time.
  • Pilot lock indicator verifies that the encoder is properly synchronized.
  • Modulators, rack mount and power supply sold separately.

Download the owners manual (PDF)

MMTS20 Technical Specifications
Composite Output
Output Impedance: 100 Ohms, intended to drive high impedance audio input of paired A/V modulator.
Output Level: 10 mV/kHz, ±10%
1.1 Vp-p for a 100% modulated signal
Video Output
Input Level range: 0.5 Vp-p to 2 Vp-p
Input Impedance: High impedance, intended to be paralleled with paired A/V modulator.
Audio Output
Input Level: 250 mVrms to 2.5V. with front panel adjustment
Input Impedance: 40K Ohms, balanced
20K Ohms, unbalanced
Stereo Performance (Note: System performance is dependant upon paired modulator.)
Stereo Separation: Greater than 20 dB
Frequency Response: within ± 1dB from 40Hz to 12.5KHz
Signal to Noise Ratio: greater than 65 dB
Total Harmonic Distortion: less than 0.25%
Spurious Subcarrier: -50dBc worst case
Test Tone
Frequency: 10.396kHz ±50Hz
Amplitude: 0.5Vp-p ±10%; all output levels are calibrated to the level of this tone and it is used to set system audio levels for proper stereo operation. The paired A/V modulator audio response must be set for "Flat" operation (pre-emphasis defeated).
DC Power Input: +12 VDC ±5% @ 150 mA
Operating Temperature: 0° to 50° Celsius (32° to 122° Fahrenheit), ambient.
Dimensions: 3.5 inches (89 mm) Height x 1 inch (25 mm) Width x 7.5 inches (191 mm) Depth
Weight: 10.7 ounces (0.30 kg.)

Specifications, price, and availability are subject to change without notice or obligation.

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