It's the best choice for large and medium-sized front-end OF CATV systems.
1. Description
SNP-68 Adjacent Channel Modulators are headend equipment for adjacent channel modulation of image and acoustical signals. Medium frequency treatment technique and phase locked loop technology are adopted to improve frequency stability. It is characterized by good out-of-band rejection and excellent vestigial sideband. It's the best choice for large and medium-sized front-end OF CATV systems..
2. Feature
1. Medium frequency treatment technique and dual-phase locked loop technology for CPU control is adopted to improve frequency stability.
2. High performance Surface Acoustic Wave Filters and Spiral Bandpass Filters are adopted to improve out-of-band rejection.
3. Independent RF Power Amplifiers are inside. The output level is up to over 110dBμV.
4. The vision signal modulation, audio deviation, A/V ratio and output level can be adjusted on the front panel.
5. It's easier to operate, because of the digital channel number of front panel and the uplink of back panel.
3. Technique Parameter
Item | Unit | Technique Parameter |
RF Parameter | ||
Frequency Range | MHz | 47~860 |
Output Level | dBμV | 110±(20 dBm Adjustable) |
Output Impedance | Ω | 75 |
V/A Power Ratio | dB | 10~20 Continuously Adjustable |
Vision Mid Frequency | MHz | 38 |
Frequency Accuracy | KHz | ≤ 5 |
Sideband Rejection | dB | ≥ 62 |
Output Return Loss | dB | ≥ 12 |
Video Parameter | ||
Input Level | Vp-p | 0.7~1.4 |
Modulation | % | 87.5 |
Differential Gain | % | ≤ 3 |
Differential Phase | ° | ≤ 3 |
S/N Ratio | dB | ≥ 51 |
C/L Delay | ns | ≤ 40 |
Frequency Response | dB | ±1.5 |
Audio Parameter | ||
Input Level | Vp-p | 0.7~1.4 |
Input Impedance | Ω | 600 (Unbalance) |
Pre-emphasis | μs | 50 |
Distortion | % | ≤ 1.5 |
Frequency Response | B | ±2 (50Hz~15KHz) |
Audio to Noise ratio | dB | ≥ 55 |
General Characteristic | ||
Supply Voltage | V | ~220V±15%(50Hz) |
Power Consumption | VA | 8 |
Dimension | mm | 483(L)x 200(W)x 44(H) |
4. Ordering Guide
Please sure:Operating Frequency Range
SNP-68 860MHz Adjacent Channel CATV Modulator
