2
INSTALLATION INSTRUCTIONS
Read the safety instruction first.
Installation of system according standard IEC60728-11 ensures safety of personnel and prevents apparatus against
damaging due to lightning or other sources of overvoltage surges.
To change the modulator settings, open the plastic cover.
If RF IN connector on the modulator is not used, connect the 75
Ω
load supplied.
To wall mount the modulator - screw the modulator to the wall (see Figure 1).
Do not connect TV antennas to modulator RF IN connector directly. If you intend to combine TV signals of antennas
and the modulator, plug in booster with output-to-input isolation
≥
20 dB between antenna output and RF IN connector.
DEFAULT SETTINGS
1. Output channel
21
;
2. Protection from unauthorized access
OFF
(Preset
oF
);
3. Service name
MHD003 CH_21
(Preset
00
);
4. Output signal attenuator
15 dB
(Preset
I5
);
5. Output signal
ON
(Preset
on
);
6. Region Europe (Preset
EU
).
7. Symbol rate 6875 Ks/s, modulation QAM64
OPERATING
CHANGING OF SETTINGS
The modulator has two modes of operating:
1. normal: sets after plug in;
Output channel can be selected in normal mode by pressing buttons “-“ or “+” (see Table 2).
2. setting: to enter the setting mode press “-“ and “+” buttons simultaneously, to exit setting mode press “-“ and “+” buttons
simultaneously for 1 second. The setting mode is indicated by point after first digit.
Select of necessary to change parameter by pressing button “-“ and set necessary parameter value by pressing “+” button.
1. Protection from unauthorized access setting (displayed
L
.
C
):
a) after switching settings mode, indicator displays protection from unauthorized access parameter name
L
.
C
;
b) select protection from unauthorized access parameter value by pressing “-“ button (displayed
o
.
n
or
o
.
F
) ;
c) change protection from unauthorized access parameter value by pressing “+“ button.
In the normal operation mode the symbol
"LO"
appears, if you try to change output channel in locked mode and output
channel remains unchanged.
2. service number:
a) press “-“ button (displayed
n
.
O
);
b) press “-“ button again (displayed number from 00 to 99);
c) change service name by pressing “+“ button.
When the service number is set to number greater that 00, the logical channel number will be added and service name is
set to MHD003 CH_service number. When the service number is set to 00, the logical channel numbering is off and service
name is set to MHD003 CH_channel number.
Note
: set different service numbers for cascaded modulators.
3. output attenuator:
a) press “-“ button (displayed
A
.
t
);
b) press “-“ button again (displayed number from 00 to 30);
c) change attenuator value by pressing “+“ button.
4. output signal switching:
a) press “-“ button (displayed
r
.
F
);
b) press “-“ button again (displayed
o
.
n
or
o
.
F
);
c) switching between RF ON and RF OFF by pressing button “+”,
“
on
”
- RF ON,
“
oF
”
- RF OFF.
5. region switching:
a) press “-“ button (displayed
r.9
);
b) press “-“ button again (displayed region name (see Table 1);
b) switching between regions by pressing button “+”.
6. software version:
a) press “-“ button (displayed
u.E
);
b) press “-“ button again (displayed software version of the modulator).
RESET TO
DEFAULT SETTINGS PROCEDURE
1. Disconnect modulator from power supply.
2. Press and hold the “-“ button.
3. Connect modulator to power supply.
4. Release the “-“ button.
After this procedure all settings, except the region,
will be set to default values.
REGION SETTING
Table 1.
Region
Displayed
Channel tables
Europe
EU
Table 2
Russia
rU
Table 2
