Detailed Product Description

Feature :

Human-oriented design such as LCD display of RF, Video/Audio intermediate frequency, Video modulation rate, Audio partial frequency and RF output voltage; optional function of reducing noise.
Designed by adjacent channel transmission standard, no interference between adjacent channels;Input and output of Video/Audio intermediate frequency signal used for scrambling subscription CATV system.
Oscillator using unique phase-lock(PLL) circuit makes phase noise extremely low, makes video clear and stable, creates auto amplitude-fixed RF circuit and causes head-end system stable and reliable.
Using dual-balancing diode modulation with fine linearity and low noise, fine indexes including signal to noise ratio(S/N), carrier noise rate(C/N), differential gain(DG) and differential phase(DP) as good as those of import slap-up modulators.
19-inch standard structure, independent power supply, flexible fit out, elegant appearance, firm structure, nice electromagnetism shield and convenient operation and maintenance.
Specifications

Video input amplitude
1Vp-p(whole TV signal, positive)

Video input impedance
75W(lotus flower plug seat)

Audio input amplitude
0.775V

Audio input impedance
10KW(Imbalance lotus flower plug seat)

Degree of video modulation signal
&le 87.5%

Video flatness
&le75dB

Phase of differential coefficient
&le2

Gain of differential coefficient
&le2%

Delay difference of color or light
&le30ns
Video signal to noise ratio
&le 58dB(unweighted)

&ge64dB(weighted)

Output frequency
45&sim870MHz

Frequency accuracy
&le1KHz

Total Frequency deviation
&le5KHz

Output level of video carrier
&ge120dBmV

Adjusting range of output level
0&sim15dB

Audio carrier power to video carrier power ratio
Negative 10&simnegative20dB

Carrier to noise ratio(C/N)
&ge65dB(fc MHz)

&ge70dB(fc MHz)

&ge80dB(fc 6MHz)

RF output impedance
75W

Output suppression
&ge65dB

Error of video/audio carrier interval
&le5KHz

Maximum partial frequency of audio
0KHz

Pre-emphasis of audio
50ms

Audio flatness(40Hz~15KHz)
&le5dB

Distortion degree of audio
&le1%
Audio signal to noise ratio
&ge60dB

Carrier to inter-modulation ratio
&ge 60dB

Output Return loss
&ge 15dB(VHF)

&ge12dB(UHF)

Power supply
220V AC10% 50Hz 20VA

Dimension
19" Standard structure

Fixing dimension
465 1.8mm

CATV headend,  digital headend,  dtv headend