PDI-50121CM Modulator
PDI-50121CM Modulator
Description Features Specifications Manual (PDF)
DESCRIPTION

The PDI-50121CM is a space saving, fixed channel modulator system. It consists of 12 individual, vertically mounted, fixed frequency modulators and an efficient switching type power supply module mounted in one 3-1/2" high housing. It is designed for 19" rack mounting. Each modulator is SAW filtered and is factory set to the desired channel and proper offset. Precise frequency is maintained with PLL circuitry. Recessed front panel controls are preset, at the factory, for 87.5% depth of modulation, ±25kHz audio deviation, and -15dBc video audio ratio. RF is set at maximum. It offers excellent video performance and high reliability in a 2U rack. Now avaible with internal Stereo - a seperate module is no longer needed!

FEATURES
+45dBmV output with very low spurious response
Precise frequency control with PLL circuitry
Easy setup
SAW filtering for true adjacent channel operation
STERRO - Internal BTSC stereo (optional)
High efficiency switch mode power supply for worldwide operation
SPECIFICATIONS
RF SECTION
Frequency Range: 54 to 860MHz
Channels VHF, CATV (STD)
Output Level +45dBmV
Output Impedance 75 ohms
Audio/Video Ratio Adjustable -12 to -20dBc
Frequency Stability ±5kHz
Spurious Outputs >-60dBc (A/V ratio at -15dBc)
Out of Band Noise -90dBc
In Band C/N Ratio >60dB
VIDEO SECTION
Input Level 0.8 to 1.2 Vp-p for 87.5%
Frequency Response <±1.5dB (30Hz to 4.2MHz)
Differential Gain 4%
Differential Phase <4 degrees
Chroma/Luminance Delay Meets FCC group delay
AUDIO SECTION
Input Level 0.75Vp-p for 25kHz deviation
Input Impedance High Z unbalanced
Frequency Response ±1.0dB reference to standard 75us pre-enphasis
Frequency Stability ±5kHz
Stereo internal (optional)
GENERAL
AC Line Voltage 90-240 Vac, 50/60Hz
Operating Temperature -10deg. C to +50deg. C
Dimensions 19 L x 7 3/4 x 3 1/2
Weight 18 pounds
Fittings Video Input "F"
RF Output "F"
Audio Input "RCA"
Click on images below for larger views of the PDI-50121CM System Components:
PDI-50121CM Fixed Modulator
PDI-50121CM
Fixed Modulator 		PDI-50121PS Power Supply
PDI-50121PS
Power Supply 		PDI-50121H Housing
PDI-50121H
Housing
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