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Modulators

Agile double-sideband TV modulators TERRA MT21P, MT22P, MT24P, MT27P

0
Manufacturer:
Type of modulator:

 

Benefits:

  • Agile TV modulators with DSB modulation;
  • 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;
  • An in-built power supply;
  • Volume control, control over  HF output level;
  • Unauthorized access protection;
  • Transmission-line summation over HF signal.
  • Connectors:

Distinctions:

MT21P 
standards: G, H, I, L, K, M, N (UHF band)

MT22P, MT24P
standards:B, D, L (HF band)

MT27P
standards: G, H, I, L, K, M, N, B, D

Technical specifications:

TYPE

MT21P

MT22P

MT24P

MT27P

Video input

frequency band

20 Hz - 6 MHz

level /impedance

1 V ± 1 dB / 75 Ω

Audio input

frequency band

20 Hz -15 kHz

range of adjustment

+1 ÷ -14 dB

level / impedance/ deviation*

775 mV RMS / 10 kΩ / 50 Hz

HF output

level (typical)/impedance

85 dBµV / 75Ω

range of adjustment

0 ÷ -15 dB

Output channels/frequency band

21-69(G, H, I, K)/470–862 MHz; 14 - 78 (M, N)/470 - 862 MHz

6-SR1 (D)/174-294 MHz**E5-S20 (B)/174-300 MHz***

1-3 (D)/48.5-84 MHz
E2-E4 (B)/47-68 MHz

21-69 (G, H, I, K)/470-862 MHz
14-78 (M, N)/470-862 MHz
6-SR18 (D)/174-294 MHz**
E5-S20 (B)/174-300 MHz***
1-3(D)/48.5-84 MHz**
E2-E4 (B)/47-68 MHz***

Frequency settability

± 50 KHz

Frequency of audio subcarrierpr

4.5 MHz, 5.5 MHz 
6.0 MHz, 6.5 MHz

5.5 MHz, 6.5 MHz

4.5 MHz, 5.5 MHz 
6.0 MHz, 6.5 MHz

Smooth control over frequency of video carrier pr

± 2.25 MHz with max. interval of 0.25 MHz

Transmission-line loss of summation over HF signal

< 2.0 dB

Frequency band for summation of HF signal

47 - 862 MHz

Non-uniformity of amplitude-frequency response in the video band

± 1 dB

A/V ratio pr

13±3 dB

12 / 16 dB switchable pr

Amplitude modulation depth, typical

81%

Sound-modulation depth control pr

± 6%

Signal/noise ratio (weighed)

≥ 55 dB

Power demand

230 V / 50 Hz / 2.5 W

Range of operating temperatures

-10 °C÷ +50 °C

Overall dimensions /Weight (in pack)

78 × 118 × 47 mm / 0.37 kg

* - - it is possible to establish standard deviation ± 50 KHz of the  audio carrier at the input level of 150 mV to 775 mV.
** - for output channels: standard D/ OIRT, audio subcarrier at 6.5 MHz
*** -for output channels: standard D/ ССIRT, audio subcarrier at 5.5 MHz
pr - able to be switched over programmatically.