Adjacent Channel Fixed Modulator (DSM2500A)

Product Description

- Applicable for 47~870MHz system, fixed channel output, specially designed for large
Scale system
- Man machien dialogue function
- Video frequency AGC function
- RS485 net administration function
- I2 C Bus control
- LCD Display: Radio frequency, Video/Audio medium frequency, Video frequency modulating
Scale, Audio frequency modulating deviation, RF output level, A/V ratio, etc.
- Audio noise reduction (optional)
- Clamping and non-clamping switch, easy for Video frequency scrambler
- Intermediate frequency modulating, Video/Audio medium frequency sgnal input, output
Port can be applid for interference loading for fee-paid TV system
- In accordance to adjacent frequency design, no interference between adjacent channel
- Having RF automatic amplitude-stabilizing circuit, making front-end system becoming
More stable and reliable
- RF output adopting modular amplification, ensuring RF output dynamic and parasite
Suppressing
- Adopting unique diode dual-balance modulating, good linearity, low noise, modulator's
Indexes, such as S/N, C/N, DG, DP, have achieved internationally advanced
Level
- Surface mount technology, ensuring the accordance of entire machine
- 19' 1U standard structure, independent power supply, elegant exterior design

Specification:
- RF:
IF 38MHz
Output return loss ≥15 dB (VHF) ≥ 12 dB (UHF)
Output level ≥ 120 dBμV (typical value)

C/N ≥ 65 dB (fc ± 4 MHz)
≥ 70 dB (fc ± 8 MHz)
≥ 80 dB (fc ± 16 MHz)
Spurious output suppression ≥ 68 dB
- Video:
Input level 1.0 Vp-p
Video modulating rate 87.5 %
Deferential gain ≤ 2 %
Deferential degree ≤ 2 '
Video in-band flatness ≤ ± 0.75 dB
Video S/N ≥ 58 dB (non coefficient added)
≥ 64 dB (coefficient added)
- Audio:
Audio deviation ± 50 KHz
Audio in-band flatness ≤ ± 0.5 dB(40Hz~15KHz)
Audio distortion degree ≤ 1 %
Audio S/N ≥ 65 dB

More Product Features


HS Code:	85176239
Trademark:	DSM
Model NO.:	DSM2500A
Standard:	DVB
Productivity:	1000 pcs/month
Shipment Terms:	by air or by sea
Minimum Order:	1 Pieces
Origin:	China
Packing:	paper carton
Company:	Sichuan Desai Electronic Technology Co., Ltd.