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Details
View of the modulator
MT-30A is the product of the well known Terra company. This high-quality VSB modulator works in D/K standard, within the whole TV frequency range (D/K: ch. 1-12, S1-S38, 21-69).
Top view
A high output level of the modulator (77-92 dBuV) allows to create cascade connections of multiple modulators. Carrier frequency is PLL stabilized.
75 ohm resistor included
Specifications
| Name | MT-30A | MT-30B | MT-30C | |
| Code | R871731 | R871732 | R871733 | |
| Input parameters | Video frequency band | 20 Hz - 6 MHz | ||
| Video level | 1 V +/- 3 dB / 75 ohm | |||
| Audio frequency band | 20 Hz - 15 kHz | |||
| Audio level | 775 mV / 600 ohm | |||
| Output parameters | Level / impedance | 77–92 dBuV (adjustable) / 75 ohm | ||
| Channel frequency band | 1-69 (D/K) | E2-E69 (B/G) | E2-E69 | |
| Carriers accuracy | +/- 20 kHz | |||
| Audio subcarrier frequency | 6.5 MHz | 5.5 MHz | A2 stereo | |
| Video carrier offset | +/-2.25 MHz max at 0.25 MHz step | |||
| Through loss | <2.0 dB | |||
| RF loop bandwidth | 47 - 862 MHz | |||
| RF loop freq. characteristic unevenness | +/-1 dB | |||
| A/V ratio (switchable) | -12 / -16 dB | |||
| Modulation factor | 75 +/-10 % | |||
| Signal to noise ratio (weighted) | >= 55 dB | |||
| II, III order intermodulation distortions | <= 60 dB | |||
| Side band attenuation on channel boundary | >= 35 dB | |||
| Audio preemphasis | 50 us | |||
| Frequency deviation adjustment | -31% to +24% | +/-6 dB | ||
| Video carrier instability | <10-5 | |||
| Power parameters and consumption | 230V/50 Hz 5.5 VA | |||
| Supplying voltage | 198 to 250 VAC | |||
| Operating temperature | -10 oC to +50 oC | |||
| External dimensions / Weight | 180 x 87.5 x 50.5 mm / 0.65 kg | |||
CAUTION:
The modulator is designed for indoor use only. The installation must be made according to the EN50083-1 standard. NOTICE: The device is powered from ~230 V power line - risk of electric shock!