ATX QFOT1310 Series, Руководство пользователя

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CHAPTER 6: FUNCTION GUIDE
Q-Series ® – QFOT1310 Series Broadcast Transmitter User Manual 7-1
CHAPTER 7: INSTALLATION & ADJUSTMENT
INSTALLATION & ADJUSTMENT
7. Installation & Adjustment
7.1. Opening the Cover
7.1.1.
Inspect the package. If the packaging has been damaged, or shows signs of water damage, please contact the freight
company or contact ATX.
7.1.2.
After unpacking, check the equipment and accessories according to packing list. If there is any question, please
contact ATX.
7.1.3.
If you think equipment has been damaged, please don’t turn on the power and avoid worse damage. Please contact ATX.
7.2. Supplies & Tools
An optical power meter
A digital multimeter
A Cable TV RF meter or spectrum analyzer
A standard fiber test jumper (FC/APC or SC/APC)
Denatured or 99% pure isopropyl alcohol and lint-free fiber optic cleaning wipes
7.3. Installation
a). Mount the equipment in the rack and ground the case.
b) Check input voltage using a digital multimeter in accordance with power requirement. Then turn on power.
c) Check the message on the VFD and the status of the front panel LED indicator. Push the
UP
and
DOWN
button to
check each parameter, ensuring that the transmitter is operating normally. (If there is no RF input, the red LED will
flash, and the VFD will display “input RF is low” .)
d) Connect standard fiber test cable to the transmitter’s optical signal output. Measure the output optical power and
confirm that the output optical power is the same as the value displayed on the VFD. (When measuring the optical
power, make sure that optical power meter is set for 1310nm wavelength and that fiber test jumper is clean.)
e) Measure the input RF signal level with a Cable TV meter or a spectrum analyzer, making sure that input RF signal
is in the range of 15~25 dBmV (optimum value 17 dBmV). At this time, you can now connect the RF signal to the
RF signal input port of the equipment. This time front panel LED turns to green and VFD displays RF input value as
“RF INPUT = XXdBmV” .
The internal RF power detector is calibrated for 77 analog NTSC channels, so the displayed value may not be correct,
depending upon your actual channel plan. It is possible to correct the displayed value to read your measured RF
level by pressing the UP or DOWN buttons to scroll the VFD until it displays “RF LEVEL=XXdBmV” , and then press
ENTER. The VFD will now display “MOD LEVEL=XXdBmV” and “Please install…” , and the user can now set the
RF input level in 1 dBmV increments by pressing the UP or DOWN buttons. When the displayed value is equal to
your tested value, press ENTER to make it effective, and at that time the VFD will display “RF LEVEL=XXdBmV” .
For instance, if real RF input level is 20 dBmV , VFD would display “RF LEVEL= 20dBmV” after operations shown
above.
f) Re-measure optical output power, make sure that optical output power being normal, remove standard fiber test
jumper and optical power meter, connect the equipment to network and end the installation.