DRAKE MM806, Instruction Manual, Page: 8 / 14

8 Installation
Figure 3 - Installation using a Directional Coupler
MM806
To Distribution
TAP
5-1000 MHz
-130dB RFI
OUT
1-WAY TAP
-30dB
IN
RF
Input
Directional
Coupler Tap
Combined
Output
Headend
Combiner
Modulators
TYPICAL HEADEND MONITOR APPLICATION
Choose a Tap value so the video carrier level to the
MM806 is in the 0 dBmV to +15 dBmV range. RACK MOUNTING
Adequate ventilation is very important in multichannel
installations. Units should be spaced apart by at least
one panel height wherever possible, and some air
movement is advisable in enclosed rack cabinets.
Excessive heat will shorten component life and system
performance will be degraded without proper cooling.
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
IN OUT
TAP
Figure 4 - Installation using an Output Monitor Port
MM806
To Distribution
Combined
Output
Headend
Combiner
Modulators
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
Output Monitor
Port
RF
Input