User's Manual

AT7120 Owner Manual Rev. 1.1 – March 2009 63/76
The adjustment has the following potential values: < 0.00 to 49.75 mV >.
4.2.2.6 < SET LO NULL Q? >
This menu allows the DC voltage adjustment for “nulling” the “Q” signal from the local oscillator (inter-
modulation in the Up-Converter.
The adjustment has the following potential values: < 0.00 to 49.75 mV >.
4.2.2.7 < SET TX BAL. AMP. I? >
This menu allows the adjustment of the “I” amplitude of the image rejection signal in the 8VSB
modulator.
range of values: < 00000 to 32767 >.
4.2.2.8 < SET PHASE I? >
This menu allows the adjustment of the “I” phase of the image rejection signal in the 8VSB modulator.
range of values: < 00000 to 32767 >.
TYPE LO NULL I:TYPE LO NULL I:
TYPE LO NULL Q:TYPE LO NULL Q:
TYPE AMPLITUDE I:TYPE AMPLITUDE I:
TYPE PHASE I:TYPE PHASE I: