Description
Four-way one modulator atv four road adjacent frequency modulator is a space-saving fixed channel 4 road, adjacent frequency modulator system, it consists of four adjacent frequency modulator and 1 way of radio frequency (RF) signal output port. This product is widely used in hotels, hotel, rental housing, factory, hospital, school, dormitory sauna massage feet and karaoke room and other places, also known as digital TV set-top boxes to share, to digital cable TV turn analog cable TV front-end is an ideal equipment. 4 road adjacent frequency modulator product features can receive digital TV set-top boxes, satellite set-top boxes, video recorders, DVD and other audio signal source; 4 audio channel input, 1 road of rf channel 4 adjacent frequency output; Using intermediate frequency modulation, high performance indicators; Using surface acoustic filter processing; The local oscillator adopt PLL technology, audio and radio frequency high frequency stability and accuracy; The whole machine adopts chip technology, the key parts adopt MMIC circuits; The output using spiral filter; The machine has the characteristics of high reliability and high temperature stability; Output level adjustment and A/V adjustment is on the front panel design, convenient adjustment. USES the standard 19 "case, cost-effective. 4 road, adjacent frequency modulator technical parameters of the rf output frequency 45-870 MHz frequency accuracy + / - 5 KHZ output level ≧ 95 dBuV ≧ restraint outside the band 60 dB sideband suppression ≧ 60 dB output impedance than 75 Ω sound - image carrier - 10 dB ~ ~ 20 dB video input level 0.6 ~ 1.5 Vp - 75 p input impedance Ω 30 dB min K input reflection coefficient 4% Max (2 t pulse) signal to noise ratio of 50 dB (weighted) delay 40 nsec in-band flatness plus or minus 1 dB (25 Hz ~ 5.8 Hz) differential gain plus or minus 4% differential phase modulation (87.5) plus or minus 4 o audio input level - 10 ~ 10 DBM Ω min in-band flatness input impedance of 10 K + 1 dB Max 0.5% distortion degree (40 Hz ~ 15 Hz) signal-to-noise ratio 60 dB distance between images, sound, according to the standard set of other input ac power 220 v (110 v) can be customized size 483 * 140 * 45 mm weight 2.5 Kg;