GTX 3000 TX Tune Procedure
Figure
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.3. Pulse Shape after R2012 Readjustment
21. Turn off power to the unit.
22. Install the transmitter compartment cover and turn the unit power back on.
23. Repeat steps 12 through 18 above to correct for any minor tuning errors that may be caused
by the presence of the transmitter compartment cover.
24. Verify that the pulse width is (a) at least 450 nS and (b) the Transmit Pulse Width field in the
SI Tool is as small as possible while still allowing the pulse width to be larger than 450 nS.
The pulse width can be increased or decreased in the GTX3000 SI Tool by entering numbers
1 thru 6 in the Transmit Pulse Width field. A larger number equates to a longer pulse width.
The pulse width should be set to the lowest number that gives a width greater than or equal
to 450 nS.
25. Verify that power output is greater than 205 watts as measured through a 1.5 dB cable loss at
the interrogation generator.
26. This completes the transmitter alignment procedure.
