DRAKE MM806, Инструкция по эксплуатации, Страница: 6 / 14

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
6 Front Panel Controls and Indicators
F1 F2 F3 F4 F5
F4 - VIDEO Modulation
This meter indicates a percentage of video modulation for
the selected channel. The Desired level is 87.5%. Adjust
the video gain of the modulator being monitored to obtain
a reading of 87.5%.
F5 - AUDIO Modulation
This meter indicates a percentage of FM deviation of the
monitored channel. 100% is equal to 25 kHz peak
deviation, the NTSC standard in the U.S.A.
For example:
Setting for CATV channel "25"-
Figure 1
For example:
Setting for CATV channel "125"-
2 5
CATV
MODE
CATV +100
CHANNEL
BCTV
2 5
CATV
MODE
CATV +100
CHANNEL
BCTV
F1 - POWER Indicator
Lights when the unit is connected to the required source
of AC power.
F2 - Mode Switch
Sets the type of channel, Off-Air or CATV. The third
position sets a leading “1” for CATV channels from 100
through 125. See also Item F3 for setting the channel
number.
F3 - Channel Number Switch
Sets the received channel number for off-air TV channels
02 through 69 or for CATV channels 02 through 125. See
also Item F2 which sets the type of channel (Off-Air or
CATV) and sets the leading “1” for CATV channels 100
through 125.