Installation Instructions

XL1000Pro
Retrofit Instructions
In order to test the equipment before actual usage, please do the
following.
1. Attach a dummy load with an in-line sample port and watt meter to the RF output connector of the
transmitter.
2. Turn the power output control fully counter clockwise minimum setting.
3. Connect the output from a TV modulated source with a visual carrier output frequency of 45.75
MHz to the cabinet input RF connector.
4. Turn the transmitter “ON” using the circuit breaker at the bottom of the front panel.
5. Set the Meter Selector to +9 and +30 Voltages and verify that +9 volts and +30 volts are present.
Apply a video signal to the modulated source and set video to blanking level plus sync.
This is very
important, do not use any other input signal.
6. Turn on the power supply circuit breaker to the “ON” position. This will energize the power
supply and the solid state RF amplifiers.
7. Increase Power Output control to achieve a reading of 100% on the front of the panel meter or
whenever the watt meter reads 600 watts whichever occurs first. If the wattmeter reads close to 600 watts,
adjust the power output control so the wattmeter reads 600 watts and refer to the XL100 instruction manual
for the correct power meter calibration procedure.
8. Connect the sample port to a spectrum analyzer ensuring the RF amplitude at the output of the
sample point will not damage the spectrum analyzer and observe the -4.5 and +9 MHz intermodulation
products. These signals should be -60 dB or lower compared to the visual carrier peak of sync power. In
some cases, it may necessary to add additional filtering to comply with FCC requirements. A list of filter
suppliers can be obtained from PTI.
After completing the procedure outlined above, the transmitter is ready to go on line. Turn off the
transmitter using the circuit breaker at the bottom of the transmitter and remove the dummy load and watt
meter. Connect the antenna to the transmitter and re-energize the transmitter. Check the reflected power
by switching the meter panel selector to the reflected power position.. The reflected power should be about
the same as that recorded before the XL1000-PRO installation. Check the aural power output by switching
the meter panel selector to the aural power position. The aural power should be the same as before the
modification.