QPSK/IP DEMODULATOR
Any interruption of the protective conductor, inside or outside the instrument, is likely to make the
instrument dangerous. The type of main plugged shipped with each instrument depends on the
country of application.
The mounting environment should be relatively dust free, free of excessive vibration and the
ambient temperature between 0
℃
to 40
℃
. Relative humidity of 20% to 80% (non-condensed)
is recommended.
Air intake for cooling is achieved via holes at the side of the device and the fans inside. The air
flow should not be obstructed. Therefore, the device has to be placed on a flat surface, leaving
some space at the sides of the device.
When in operation, the internal temperature should not exceed the limit of 70
℃.
Caution
Do not connect AC power until you have verified that the line voltage is correct and the proper
fuses are installed. The equipment requires a power source of either 50/60 Hz at 110V or 50/60
Hz at 240V. The voltage ranges for these nominal voltage values are shown in the table:
POWER REQUIREMENT
Input voltage
90-260 Vrms auto select
Frequency
47 to 63 Hz
Power
50 VA max. / 30 VA typical.
Current
110 V/0.27A or 240 V/0.125A typical
Caution
Table 3.1 Power requirement
Be sure the supply voltage is within the specified range.
Checking the fuses
The recognized recommended fuses are size 5 by 20 mm, rate T 2.0A, 250 V (UL and IEC
approved).
The line fuse is housed in a small container besides the power connector on the rear panel. To
check the fuse, insert the tip of a screwdriver in the slot at the middle of the container and pry
gently to extend the fuse where there is a little tap and pull out the fuse gently. The fuse is
attached to the line module and cannot be removed.
Inspection and Test
Check if the devise has any visible damage. If everything seems all right, power can be applied to
the device. The main socket and fuse are located at the rear panel of the device.
When the device is turned on, verify that the display shows the following message:
Digital TV Processor
(factory default unit-name)
IP: 168.192.1.21
(factory default IP Address)
If no message is shown in the display or there is not light in the display, the device is defective
and has to be returned for servicing.
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