Agilent Technologies X Series Manual page 418

Input/Output
Independent I and Q
Sets the signal input to be both the I and Q channels, but as independent inputs. It is equivalent to treating
I as channel 1 and Q as channel 2 in an oscilloscope. Each channel's data is still complex. When the
center frequency is 0 the imaginary part will always be zero, but for any other center frequency both the
real and imaginary parts will be significant.
This selection is only available in VXA.
Key Path
Example
Notes
Readback Text
Initial S/W Revision
I Setup
Access the channel setup parameters for the I channel.
Key Path
Initial S/W Revision
I Differential Input
Selects differential input on or off for the I channel. For differential input (also called balanced input),
the analyzer uses both main and complementary ports. When differential input is off (also called
single-ended or unbalanced input), the analyzer uses only the main port.
Key Path
Remote Command
Example
Notes
418
Input/Output, I/Q, I/Q Path
Turn on both I and Q channels and treat I as channel 1 and Q as channel 2.
FEED:IQ:TYPE IND
The Independent I and Q selection is only available in GPVSA
Ind I/Q
Prior to A.02.00
Input/Output, I/Q
Prior to A.02.00
Input/Output, I/Q, I Setup
:INPut:IQ[:I]:DIFFerential OFF|ON|0|1
:INPut:IQ[:I]:DIFFerential?
Put the I channel in Differential Input mode
INP:IQ:DIFF ON
When I Differential Input = On, the analyzer will check for attenuation
mismatches between the I and I-bar ports. If the difference in attenuation
values exceeds 0.5 dB a Settings Alert error condition, error 159 will be set.
When I Differential Input = On, and IQ Path is I+jQ, the Q Differential input
must also be On. Similarly, when I Differential Input = Off, and IQ Path is
I+jQ, the Q Differential input must also be Off. If the states of the two inputs
do not match, an error condition message is generated, 159;Settings Alert;I/Q
mismatch:Differential.