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Modulators

TERRA single-band TV modulators MT30A, MT30B, MT30C

4
Manufacturer:
Type of modulator:
 

Benefits:

  • Agile TV modulators  with one band (channel-to-channel operation);
  • LED display and button-type control  over a built-in microprocessor;
  • Non-volatile memory;
  • Phase-locked-loop quartz-crystal control over frequencies carrying video and acoustical signals;
  • Control over HF output level and input level of sound;
  • Transmission-line summation over HF signal;
  • One modulator covers the whole TV range;
  • Low level of harmonics  and intermodulation distortion;
  • A built-in test-generator;
  • Connectors:

o                                                        V/A - jack of type RCA;

o                                                        HF – jack of type F.

Distinctions:

  • mt30A:

o                                                        standard: D/K/L;

  • mt30B:

o                                                        standard: B/G/I;

  • mt30C:

o                                                        standard: B/G/stereo A2.

Technical specifications:

TYPE

MT30A

MT30B

MT30C

Video input

frequency band

20 Hz -6 MHz

level /impedance

1 V ± 3 dB / 75 Ω

Audio input

frequency band

20 Hz -15 kHz

level /impedance

775 mV / 600 Ω

HF output

level /impedance

80 ÷ 95 dBµV (adjustable) / 75 Ω

Output channels / frequency band pr

LO5-69 (L)/ 176 ÷ 862 MHz; 1-69 (D/K) / 48.5 ÷ 862 MHz

E2-E69 (B/G) / 47 ÷ 862 MHz; 4-69 (I) /174 ÷ 862 MHz

E2-E69 (B/G) / 47 ÷ 862 MHz

Frequency settability

±20 kHz

Frequency of audio subcarrierpr

6.5 MHz

5.5 MHz,6.0 MHz

A2 stereo

Frequency adjustment to video carrierpr

± 2.25 MHz max. with interval of 0.25 MHz

Transmission-line losses of summation

< 2.0 dB

Frequency range of HF mixer

47 - 862 MHz

Non-uniformity of amplitude-frequency response in video band

±1 dB

Change in A / Vprratio

12 / 16 dB

Amplitude modulation depth

81%

S/N ratio (weighed)

≥ 55 dB

Intermodulation distortion of II, III orders

< -60 dB

Power demand

230 V / 50 Hz / 6 W

Operating temperature range

-10 °C ÷ +50 °C

Overall dimensions

180 × 87.5 × 50.5 mm

Weight (in pack)

0.65 kg

pr - programmed check.