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LS-M830 Professional Agile Audio & Video Modulator
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LS-M830 Professional Agile Audio & Video Modulator

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LS-M830

Professional Agile Audio & Video Modulator

 

Features

 Base-band video and audio inputs

 All systems and channels between 45 and 870MHz Agile Controlled by Advance Micro-processor

 Double heterodyne conversion,Triple IF SAW filter. High vestigial sideband selectivity

 Output TV channel frequency through ternary VCO-PLL synthesis

 Full +55dBmV output , LCD display

 Adjustable A/V ratioRF output levelvideo and audio modulation index ,Controlled by

    Advance Micro-processor

 Adopt high quality SMPS,ensure wide power supply range

 IF loop-through, Front panel -20dB test point capability

Specifications

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:                  AC100240V

Input return loss:                    20 dB

Consumption:                   25 W

Modulation depth:                    87.5%

Operating temperature:           -10 … 55

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

 

 

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