Agilent Technologies N8201A Service Manual download pdf (Page 321)

Digital Modulation Commands 10

Agilent N8211A/N8212A Performance Upconverter Synthetic Instrument Module, 250 kHz to 20 / 40 GHz 321

:IQADjustment:IOFFset

Supported N8212A

[:SOURce]:DM:IQADjustment:IOFFset <val>

[:SOURce]:DM:IQADjustment:IOFFset?

Adjusts the I channel offset value.

The <val> variable is expressed as a percent with 100% equivalent to 500 mV DC at the

input connector. The minimum resolution is 0.025%.

When using this command to minimize the LO feedthrough signal, optimum performance is

achieved when the command is sent after all other I/Q path commands are executed, such

as those that change the internal phase polarity or adjust the modulator attenuator. If other

adjustments are made after minimizing is performed, the LO feedthrough signal may

increase.

This command is effective only if the state of the I/Q adjustment function is set to ON.

Refer to “:IQADjustment[:STATe]" on page 332.

Example

:DM:IQAD:IOFF -30

The example sets the I channel offset to –30%.

*RST +0.00000000E+000

Range −5E1 to +5E1

:IQADjustment:QOFFset

Supported N8212A

[:SOURce]:DM:IQADjustment:QOFFset <val>

[:SOURce]:DM:IQADjustment:QOFFset?

Adjusts the Q channel offset value.