{multithumb}
Multistandard twin modulators mt420 and mt420C – TV modulators are intended to form single side band signal of analogue TV in VHF and UHF bands. Each section is controlled separately and output channel of each section of the modulator is set independently of the other section.
The newest components and switched 7/8 MHz SAW IF filters provide excellent operating characteristics of output signal.
Modulators are powering from an external +12 V power supply with the ability to transfer power to other modulators by special flat cable.Modulators design provides big flaxibility under the installation.
Advantages:
- two independent frequency agile vestigial sideband
TV modulators integrated into one module - LED display and push buttons control of internal microprocessor
- non-volatile channel memory
- PLL crystal stabilization of carriers frequency
- adjustable RF output level and audio input level for every section
- loop through RF combining
- low level harmonics and intermodulation products
- built-in test pattern generator
- robust diecast housing
- connectors:
- video/audio input - RCA socket
- RF - type F
- screw terminal block for DC entry
Differences
- mt420 VSB single-band modulator, standard B/G/D/K/I/L/Au
- mt420C VSB single-band modulator, standard B/G/D/K/Au stereo A2
Installation example
Technical specifications:
| Type |
mt420
|
mt420C
|
||||||
| TV standard pr | B/G/D/K/I/L/Au | B/G/D/K/Au stereo A2 | ||||||
| Frequency range | 110-862 MHz | |||||||
| Video input | frequency range |
20 Hz - 6 MHz
|
||||||
| level/impedance |
1 V ± 0,1 В/75 Ω
|
|||||||
| Audio input | frequency range |
20 Hz - 15 kHz
|
||||||
| level/impedance |
775 mV /10 kΩ
|
|||||||
| level adjustment pr (dB) |
-6 … +6 by 2 dB step
|
|||||||
| Rf output | level/impedance |
90 dBmV/75 Ω
|
||||||
| level adjustment range |
0 + -10 dB by 1 dB step
|
|||||||
| Frequency range o RF combining (MHz) |
47-2150
|
|||||||
| DC pass through (A) |
0.3
|
|||||||
| Combining through loss Terr/SAT (dB) |
1.5/2.5
|
|||||||
| Return loss, dB |
≥ 10
|
|||||||
| Sound subcarrier frequency, pr | 5.5 MHz, 6.0 MHz, 6.5 MHz | stereo A2 | ||||||
| Fine tuning range of video carrier frequency pr (MHz) | ± 2.25 max by 0.25 step | |||||||
| IF bandwidth pr (MHz) | 7/8 | |||||||
| A/V ratio pr dB | 12 / 16 | |||||||
| S/N ratio, weighted dB | ≥ 55 | |||||||
| IMD2/IMD3 spurious level (dB) | < -60 | |||||||
| Current consumption | 12 V / 4,5A | 12 V / 4,7 | ||||||
| Operating temperature range °C | 0 … +50 | |||||||
| Dimentions (mm) | 198 x 107 x 36 | |||||||
| Weight (packed) kg | 0.9 | |||||||
pr – software control
 |
 |
||
Power supply:
| Type |
GS15E-3P1J
|
DR-60-12
|
||
| DC output | +12 V 1.25 A | +12 V 4.5 A | ||
| Mains voltage | 100 V…240 V, ~ 50 Hz | |||
| Operating temperature range | 0…+40 °C | -20…+50 °C | ||
| Dimentions/Weight(packed) | 34x71x50 mm/0.18 kg | 78x97x56 mm/0.4 kg | ||
Задать вопрос: