Transcript
50121CM
Mini-Modulator
DESCRIPTION 50121CM are space saving, user friendly, 132 channel, frequency agile modulator systems. They consists of 6 individual, vertically mounted, agile modulators, an efficient switching type power supply module and a micro controller module in one 5-1/4” high housing. Each modulator is SAW filtered and provides precise channel selection for all VHF and cable channels from channel 2 through 134 (54-860MHz) including A-1 to A-5. Channel selection is easily accomplished with up/down push switches from the front panel of the micro controller. The number is displayed simultaneously on the micro controller LCD screen and on the modulator module 7 element LED. Additional adjustments for depth of modulation, audio deviation and audio to video ratio for each modulator are read on an LCD screen with an “N” (normal), “L” (low) and “H” (high). This allows easy setup by the technician without expensive test equipment.. The micro controller also allows easy selection of HRC, IRC or STANDARD and 0, 12.5 and 25kHz offsets with the front panel push switches. Channel selections are protected by a non-volatile memory that restores the channel automatically in the event of a power failure. A composite IF loop is provided for scrambling or EAS operation.
FEATURES
+45dBmV output with very low spurious response Microprocessor controlled PLL tuning for precise frequency control User friendly setup because of internal test circuitry which constantly monitors modulator operating parameters and displays results on the LCD screen Non-volatile channel memory Professional grade SAW filters for true adjacent channel operation Composite IF loop-through for scrambling or EAS insertion BTSC stereo compatible Also Available In All PAL Configurations
SPECIFICATIONS RF SECTION Frequency Range: 54 to 860MHz Channels CATV (STD, HRC, IRC) Output Level +45dBmV Output Impedance 75ohms Audio/Video Ratio Adjustable -10 to -30dBc Frequency Stability +5kHz Spurious Outputs > -60dBc (A/V ratio at -15dBc) Out of Band Noise -80dBc (-100dBc w/BPF) VIDEO SECTION Input Level 0.8V to 1.2V p-p for 87.5% modulation Frequency Response < ±1.5dB (30Hz to 4.2MHz) Differential Gain < 4% Differential Phase < 4 degrees Chroma/Luminance Delay Meets FCC group delay requirement AUDIO SECTION Input Level 250mV min. for +25kHz deviation Input Impedance 600ohms unbalanced Frequency Response < +1.5dB (50Hz to 15kHz) Pre-Emphasis 75 Microseconds OPERATIONAL RF Output F female Video Input F female Rear Panel Connections: Audio Input F female IF Loop F female Harness Connector 5 pin UP/DOWN Channel Select STD(CATV), IRC, HRC RF Output Level Front Panel Controls: Aural Carrier Level Video Modulation Depth Audio Deviation Menu Set Power On LEDS Front Panel Indicators: 3 Digit Channel Number Led Display
Antex Electronics Corp. #104, Fu-Shan St. Chung Hua City, Taiwan TEL: 886-4-7322561 FAX: 886-4-7322614
E-mail:
[email protected]
URL: http://www.antex.com.tw
