The Olson Technology LCM-550×1 is a frequency agile modulator module engineered for CATV headend systems, private cable networks, and video distribution applications. This module delivers amplitude-modulated visual carriers and frequency-modulated aural carriers across a wide tunable range, with output levels meeting FCC Title 47 Part 76 specifications. The LCM-550×1 integrates into Olson’s modular LCM-550×12 chassis ecosystem, which houses up to twelve modulators in a compact 3.5″H × 19″W rack-mountable frame with universal power supply.
Technical Specifications
Frequency Performance
• Output Frequency Range: 55.25 MHz to 547.25 MHz
• Frequency Selection: 2 MHz increments via front-panel DIP switches; internal 250 kHz fine adjustment available
• Audio Intercarrier Accuracy: 4.5 MHz ±1 kHz
• Frequency Stability/Accuracy: Designed per FCC Title 47 Part 76 (+10 °C to +40 °C), offset adjustable via front-panel potentiometer
Signal Performance
• Output Level: +45 dBmV typical, +40 dBmV minimum per channel; downward adjustable by 10 dB minimum
• Out-of-Band Spurious: >60 dB below visual carrier
• Out-of-Band C/N Ratio: >80 dB
• In-Band C/N Ratio: >57 dB
• Audio/Video Ratio: Adjustable 13 dB to 20 dB below video carrier
Input Interfaces
• Video Input: 1 V P-P nominal for 85% modulation; adjustable down to 0.5 V P-P; 75 Ω impedance (RCA connector)
• Audio Input: 500 mV P-P for 25 kHz deviation; front-panel adjustable; 10 kΩ impedance (RCA connector)
– Key Features
• Modulation: Amplitude modulation (visual), frequency modulation (aural)
• FCC-compatible television modulator design
• Compatible with baseband scrambling techniques
• Occupies three slots in LCM-550-RKA chassis
– Typical Applications
CATV headend systems, private cable networks, video distribution systems requiring agile frequency selection and FCC compliance.
– Compatibility & Integration
The LCM-550×1 mounts in the LCM-550-RKA rack chassis (3.5″H × 19″W), which accepts up to twelve modulators or eight demodulators in any combination. System includes universal power supply (85–264 VAC, 47–63 Hz, 60 W maximum). Optional LCM-550-FAC 12-port combiner (50–550 MHz specified, 870 MHz capable) with –20 dB front-panel test point.
