Single agile channel catv analog modulator
1. Intermediate frequency, twice conversion frequency and with saw filter, low side-band interfere.
2. MCU technique is applied to audio intermediate frequency, video high frequency process and RF local oscillator, with high frequency stability and accuracy.
3. Integrated circuit is applied to outputs, and each functional circuit of the overall unit adopts SMT technology, with high stability.
4. LED displays frequency, using up and down button to select channel and frequency.
5. Convenient control, frequency level adjustment is on front panel.
6. High efficiency SMPS.
7. We can offer PAL or NTSC system standard upon customer’s requests.
reflection | output frequency range | 45-870MHz any frequency |
frequency accuracy | ± 5KHz | |
output level | 113dBmV | |
out of band suppression | ≥60dB | |
side-band suppression | ≥60dB | |
output impedance | 75 Ω | |
video to audio carrier ratio | -10dB ~ -20dB | |
video frequency | input lever | 0.6 ~ 1.5Vp-p |
input impedance | 75 Ω | |
input reflection | 30dB min | |
K coefficient | 4 % max （ 2T pulse ） | |
video s/n | 50dB ( no emphasis ) | |
C/L delay | 40nsec | |
frequency response | ± 1dB（ 25Hz ~ 5.8MHz） | |
differential gain | ± 4% （ modulation 87.5 ） | |
differential phase | ± 4 ° | |
audio frequency | input level | -10 ~ 10 dBm |
input impedance | 10KΩ min | |
frequency response | ± 1dB max（40Hz ~ 15KHz） | |
distortion | 0.5 % | |
signal to noise radio | -60dB | |
audio picture interval | according to the style | |
power supply | voltage | 110V or 220V |
