Dingshengwei Electronics Co., Ltd
catv modulator, modulator, catv, catv products, RF modulator, Manufacturer and Supplier - China(CN)
Fixed Channel Modulator (Adjacent) (SK-218M)
Features
1. Intermediate frequency process, high functional index.
2. Saw filters process.
3. Luxurious housing.
4. MMIC circuits are on key parts and SMT technology is
applied to the overall unit.
5. Digital displays channel number.
6. Output adopts screw filters.
7. With high security and high temperature stability.
8. Output level adjustment and A/V adjustment on front panel.
9. PLL technique is applied to audio and RF local
oscillator¡Ahigh frequency stability and high accuracy.
10. We can make different channels according to the customer requests.
Specifications
reflection Output frequency range 45-870MHz
frequency accuracy ¡Ó 5KHz
output level 113dB?V¡]?550MHz¡^
out of band suppression ? 60dB
side-band suppression ? 60dB
output impedance 75£[
video to audio carrier ratio -10dB ~ -20dB
video
frequency input level 0.6 ~ 1.5Vp-p
input impedance 75£[
input reflection 30dB min
k coefficient 4 % max ¡] 2T pulse ¡^
video s/n 50dB( no emphasis )
C/L delay 40nsec
frequency response ¡Ó 1dB¡] 25Hz ? 5.8MHz¡^
differential gain ¡Ó 4 % ¡] modulation 87.5 ¡^
differential phase ¡Ó 4 ¢X
audio
frequency input level -10 ~ 10 dBm
input impedance 10K£[ min
frequency response ¡Ó 1dB max¡]40Hz ? 15KHz¡^
distortion 0.5 %
signal to noise ratio 60dB
audio picture interval according to the TV system standard
power
supply
Voltage
220V or 110V