hot sell catv digital headend hd to dvb-t rf modulator
hot sell catv digital headend hd to dvb-t rf modulator
1. Base-band video and audio inputs
2. All systems and channels between 45 and 870MHz Agile Controlled by Advance Micro-processor.
3. Double heterodyne conversion,Triple IF SAW filter. High vestigial sideband selectivity.
4. Output TV channel frequency through ternary VCO-PLL synthesis.
5. Full +55dBmV output , LCD display.
6. Adjustable A/V ratio,RF output level,video and audio modulation index ,Controlled by Advance Micro-processor.
7. Adopt high quality SMPS,ensure wide power supply range.
8. IF loop-through, Front panel -20dB test point capability.
Technical parameter | |
RF | Adjustable peak deviation: ±50 kHz |
Output frequency: 45-870 MHz Agile | Pre-emphasis: 50μs |
Nominal output level: ≥55 dBmV | Flatness (40Hz …15kHz): ≤±1.5 dB |
Output impedance: 75Ω | Distortion(fm=1kHz; f=50kHz): ≤1% |
A/V RATIO: -10 - -20 dB | S/N ratio: ≥65dB |
Carrier frequency tolerance: ≤5 kHz | IF section |
Carrier frequency distance tolerance: ≤100 Hz | Video carrier frequency: 38.9(B-G) 45.75(M-N) 38 (D-K) |
Spurious in band: ≤-60 dB | Audio carrier frequency:33.4(B-G)41.25(M-N)31.5 (D-K) |
Output level adjustment: 0 - -20 dB | Video carrier output level: ≥30dBmV |
Side-band Suppression: ≥65 dB | Audio carrier output level: ≥20dBmV |
C/N ratio in channel: ≥65 dB | Input/output impedance: 75Ω |
Video | Input/output return loss: ≥12 dB |
Input level: 0.7-1.4 VPP | General |
Input impedance: 75Ω | Supply voltage: AC100-240V |
Input return loss: ≥20 dB | Consumption: 25 W |
Modulation depth: 87.5% | Operating temperature: -10- +55°C |
Differential gain: ≤4% | Video,audio connector type: “RCA” |
Differential phase: ≤4 o | IF and RF connector type: “F” |
Flatness in band: ≤±1.5 dB | Outside dimensions(h×w×d): 483×210×44mm |
Cr/L delay: ≤40 ns | Packed weight: 2 .5kg |
Weighted S/N ratio: ≥60 dB |
|
Audio | |
Input level: 0.775V±10 dB | |
Input impedance (unbalance): 10kΩ | |
- Step 1Find your interested products by search keywords
- Step 2Contact the supplier by clicking ”Enquire” or “request meeting” button, otherwise, you also could consult our import consultant.
- Step 3After verifying your email, get response from suppliers or our trade manager will contact you as soon as possible
- Step 4Set up meeting with the Chinese supplier without language barrier