DRAKE MM806, Инструкция по эксплуатации, Страница: 4 / 14

4 Table of Contents / Description
2 Caution Statements
3 Important Safety Instructions
4 Table of Contents / Description
5 Specifications
6 Front Panel Controls and Indicators
7 Rear Panel Controls and Connections
8 Installation
9 Reference Chart of Off-Air and CATV Channels
10 Service / If You Need To Call For Help
11 Warranty
Also provided is an audio output signal. Two modulation
meters simultaneously provide readout of video
modulation percentage and audio deviation percentage of
25 kHz peak deviation.
As previously described, channel selection switches are
located on the front panel. The RF Input is through an “F”
type connector located on the rear panel. The rear panel
Video Output is also an “F” type connector.
Unbalanced Audio Output is through a rear panel RCA
type phono connector. The unit is powered through the
attached AC line cord by a nominal 115 VAC, 60 Hz
source of power.
0 20 40 60 80 100
% MODULATION
0 20 40 60 80 100
% MODULATION
2 5 POWER CATV
MODE
CATV +100
CHANNEL VIDEO
100% = 25 kHz PEAK
AUDIO
DEPTH OF MODULATION
BCTV
MM806 MODULATION MONITOR
The R.L. Drake MM806 is a professional quality agile
television demodulator with video and audio metering that
demodulates any VHF, UHF, or CATV channel
(54 - 806 MHz).
One MM806 may be added to a headend installation with
the combined headend output sampled with a directional
coupler and the sampled output fed to the MM806 RF
input. Any NTSC channel from the headend can be
selected and monitored on the MM806. This allows easy
setup of video and audio levels.
The desired off-air VHF or UHF television channel from
2 through 69 or CATV channel from 2 through 125 is
selected by a front panel pushwheel switch and
associated slide switch. The MM806 provides a standard
negative sync video output at a nominal level of 1 Vp-p.