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CATV Analog Modulator:
Functions and Features:
1. Combined medium frequency input and out interface.
2. Micro CPU control, 2 bits LED display, front board operation, easy use;
3. CPU control high frequency phase locked loop local oscillation circuit, no frequency-deviation or drift at all.
4. Initiate medium frequency is generated directly by the phase locked loop circuit not mixing frequency, accompanying sound, thus the medium frequency image frequency and the harmonic component are reduced to the lowest level.
5. Applicable range from 48 to 860MHz.
6. Microcomputer self-diagnosis, erro code display, easy maintenance.
7. SAWF ensures the idle component and adjacent channel sideband component of the output signal to be smallest.
8. Adjustable A/V ratio, video modulation index (VIDEO), radio strength (SOUND), RF output level (RF OUT), easy use.
Technical Data:
Item | Parameter |
Vision Carrier Max Output Level | 108dBuV |
Out-band Rejection | >65dB |
Adjacent Channel Rejection(fp=1.25MHz) | >45dB |
Output Impedance | 75Ω |
RF Output Return Loss | >14dB |
Frequency Accuracy | ±5KHz |
Output Level Setting | 20dB |
Video Modulation Index | 87.5% |
Video Frequency Response (f=30Hz~5.5MHz) | <1.0dB |
Video SNR | S/N>53dB |
Differential Gain | DG <3% |
Differential Phase | DP <3° |
Color/Bright Delay Inequality | Δτ<40nS |
Image Sound Carrier Frequency Distance | 6.50MHz±1.0KHz |
V/A Carrier Power Ratio | 10~20dB Continuously Adjustable |
Max Accompanying Sound Frequency Deviation | 50KHz |
Accompanying Sound Frequency Response (f=40Hz~15KHz) | ±1.5dB |
Accompanying Sound SNR(f=1KHz) | >55dB |
Accompanying Sound Distortion Factor | 1.0% |
Power Supply | 220V.AC |
Figure Size | 19(W) × 7.5(D) × 1.75(H)INCH |
CATV Analog Modulator