TV Modulator TERRA MT42
Code: R871742
General view of the modulator
View with the cover open
Top view with the cover open
View of the packaging
Double sideband modulator MT42 has a microprocessor control - the choice of output channel is performed with two buttons (after opening the top cover). The channel number or any changeable parameter is displayed on the LED display and stored in non-volatile memory. Use of quartz-stabilized PLL practically eliminates frequency error. There is a possibility to protect the modulator against unauthorized change of the preset parameters.
The modulators can be connected in cascade. Their RF signals can be combined with terrestrial TV channels (it requires to match the levels of terrestrial TV signals with the RF output levels of the modulators, as well as to ensure adequate frequency spacing).
The modulators can be connected in cascade. Their RF signals can be combined with terrestrial TV channels (it requires to match the levels of terrestrial TV signals with the RF output levels of the modulators, as well as to ensure adequate frequency spacing).
In comparison to the previous series, these Terra modulators can provide compatibility with many versions of the PAL system.
Adjustment options:
- video carrier frequency,
- RF output level,
- audio subcarrier frequency,
- A/V ratio,
- standard deviation (+/-50 kHz) of audio carrier for input level 150-775 mV
- video carrier frequency,
- RF output level,
- audio subcarrier frequency,
- A/V ratio,
- standard deviation (+/-50 kHz) of audio carrier for input level 150-775 mV
The modulators can be successfully used both in home antenna installations as well as in small-sized MATV systems. Meticulous quality control in Terra company makes these devices virtually failure-free.
Specifications
| Name | MT41 | MT42 | MT47 | |
| Code | R871741 | R871742 | R871747 | |
| Video input | frequency range | 20 Hz - 6 MHz | ||
| level / impedance | 1 V +/- 1 dB at 75 ohm | |||
| Audio input | frequency range | 20 Hz - 15 kHz | ||
| level adjustment | + 1 ... -14 dB | |||
| level (adjustable) / impedance / standard deviation | 775 mV RMS / 10 kohm / 50 kHz | |||
| RF output | level (typical) / impedance | 90 dBuV / 75 ohm | 85 dBuV / 75 ohm | |
| level adjustment | 0 ... -20 dB | |||
| PAL version | G/H/I/L/K/M/N /Australia | B/D/L/H/I/M/N /Australia | B/G/D/K/H/I/L/M/N /Australia | |
| frequency range | 470 - 862 MHz | 170 - 300 MHz | 170 - 300, 470 - 862 MHz | |
| Carrier frequency error | +/- 50 kHz | |||
| Audio subcarrier frequency | 4.5; 5.5; 6.0; 6.5 MHz | |||
| Fine tuning range of video carrier frequency | +/- 2.25 MHz, 0.25 MHz step | |||
| RF loop-through loss (SAT / Terr) | 2.5 / 1.5 dB | |||
| RF loop-through frequency range | 47 - 2150 MHz | |||
| Frequency response variation (video) | +/- 1 dB | |||
| A/V ratio | 12/16 dB | |||
| Amplitude modulation depth (typical) | 81 % | |||
| SNR (weighted) | >= 55 dB | |||
| Supplying voltage / power consumption | 230 VAC 50 Hz 2.5 W | |||
| Operating temperature range | -10 ... +50 deg C | |||
| Dimensions / Weight | 133x73x39 mm / 0.36 kg | |||
TV Modulator TERRA MT42
Code: R871742