Specifications

8-VSB Agile Modulator Issue 1.02 December 9, 2008 Page 27 of 29
www.technalogix.ca
Modulator Operation
1. Terminate modulator into a 50 ohm load before applying power.
2. Connect the power cord of the Technalogix modulator to a proper electrical
source as indicated on the back of the unit.
3. Connect the MPEG-2 encoded input to the jack on the rear panel (either ASI-320
or SMPTE-310).
4. Connect the RS232 on the front panel to a computer and run the control
software.
5. Select the desired output channel by entering the center frequency on the
“Frequency” space.
6. On the front panel, connect the test point to a spectrum analyzer. Make sure that
the signal is present, at the correct frequency, and at the proper level.
• Allow for 30 seconds delay for the signal to be present after turn on.
7. Connect the RF output to a spectrum analyzer and verify the signal, the
frequency, and the level.
TECHNALOGIX POWER SUPPLIES IN THE MODULATORS ARE
DESIGNED SO THAT UNDER CERTAIN POWER LINE OR HEAT
BUILDUP CONDITIONS, THE UNIT SHUTS OFF. AN INDICATOR
WOULD BE NO RF OUTPUT. IF THIS OCCURS, UNPLUG THE
POWER CORD AND WAIT TWO MINUTES BEFORE RE-POWERING.
UPON APPLYING POWER, YOU SHOULD AGAIN HAVE RF OUTPUT.
IF NOT, OR SHOULD THE UNIT RETURN TO SHUTDOWN MODE,
PLEASE CONTACT TECHNALOGIX FOR ASSISTANCE.
TECHNALOGIX HIGHLY RECOMMENDS A 1.75 INCH AIR
CIRCULATION SPACE BETWEEN ANY PIECES OF RACK MOUNTED
EQUIPMENT.
THE MODULATOR WILL TAKE APPROXIMATELY ONE HOUR TO
REACH A STABLE OUTPUT LEVEL DUE TO TEMPERATURE WARM-
UP.
Look at the transmitted output using a suitable monitor. The picture and sound quality
should be clean and sharp. If the output picture and sound quality is unsatisfactory,
check the input signal, the input and output connections, and make sure that the
attenuation to the monitor is within the range specified by the manufacturer.