Technical data
Chapter 12 179
Basic Measurements Programming Commands
Basic IQ Data
Basic Measurements Programming
Commands
Basic IQ Data
If Basic IQ data is included in the Measurement Bit Mask, then this allows for a limited amount of IQ
data to be returned over SCPI, to allow for further analysis outside the test set. Other measurement
results are shown on the front panel and can also be accessed remotely over SCPI, but the Basic IQ data
is only available over SCPI. The amount of data that can be output is specified in the test set
specifications document which is available on the Agilent website, www.agilent.com/find/e6640a.
NOTE In any acquisition, averaging must not be on (greater than one) when any of the
measurement bit masks within the acquisition includes Basic IQ data.
There are two parameters associated with Basic IQ and these are Info BW and Min Sample Rate. These
two parameters apply to the whole Sequence unless changed by a Delta parameter. Information
bandwidth or Info BW is a parameter that is set the hardware filter in front of the analog-to-digital
(ADC) converter.
Basic IQ measurement SCPI commands
The Basic IQ measurement requires the following parameters to be specified:
• Digital IF BW
• Measurement Type (raw IQ data samples or amplitude/phase pairs)
The following commands are used to set up these parameters:
[:SENSe]:LSEQuencer:BIQData:DIF:BANDwidth[:RESolution] <freq>
[:SENSe]:LSEQuencer:BIQData:TYPE RDATa|APHase
For more detailed information about the SCPI commands above refer to the Sequence Analyzer online
help (or in pdf format, the User’s and Programmer’s Reference).