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DMM806 AGILE VIDEO DEMODULATOR

The Drake DMM806 Video Demodulator is a professional quality agile television demodulator that provides an audio and video output from any VHF, UHF, or CATV channels (54 - 806 MHz). The standard single rack-unit design permits convenient pairing with a Drake Professional Video Modulator to perform off-air or CATV channel processing.

Low cost NTSC demodulator

Synthesized reception of off-air TV channels 2 through 69, and CATV channels 2 through 125; selection set by a front panel pushwheel switch.

Fixed 1.0 Vp-p NTSC standard negative sync video output, adjustable audio output level.

Defeatable de-emphasis for passing stereo and SAP signals to a Drake modulator.

Wide range AGC.

Low distortion synchronous detection.

DMM806 Technical Specifications

RF

Input Frequency Range:

54 through 806 MHz,
Off-Air channels 2 through 69,
CATV channels 2 through 125.

Input Level:

-10 to +35 dBmV

Noise Figure:

VHF: 8 dB
UHF: 10 dB

Image Rejection:

VHF: 65 dB
UHF: 50 dB

Input Impedance:

75 Ohms
Video

Output Level:

1.0 Vp-p nominal, NTSC standard negative sync

Output Impedance:

75 Ohms

Differential Gain:

Less than 5%

Differential Phase:

Less than 5 degrees

L/C Delay:

125 nanoseconds nominal
Audio

Output Level:

300 mV rms ± 10 dB, adjustable with front panel control

Output Impedance:

Less than 500 Ohms, unbalanced
General

DC Power Requirements:

+12 VDC @ 120 mA, +5 VDC @ 100 mA

Operating Temperature:

0° to 50° Celsius (32° to 122° Fahrenheit), ambient.

Dimensions:

3.5 inches (89 mm) Height x 1 inch (25 mm) Width x 7.5 inches ( 191 mm) Depth

Weight:

12 ounces (0.43 Kg.)

INNER S.R.L. Todos los derechos reservados 2005