Agilent Technologies Signal Analyzer N9030a - Manual (Page 858)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Meas Setup
More Information
There are 2 types of noise sources: a Smart Noise Source (SNS), and a "Normal" noise source - e.g.
346 series. This menu allows the user to control both. The SNS has its own connector on the rear
of the analyzer and when it is connected the user can then select it from the “Type” 1 of N,
allowing the State parameter to then control the SNS. The "Normal" source is controlled by a BNC
connector that supplies 28V. If SNS is NOT connected then the “state” parameter controls the
"Normal" noise source 28V BNC port. If both are connected the “Type” parameter will determine
which source the “State” parameter will control. Two sources can never be controlled together. The
“SNS attached” SCPI query detailed below can be used remotely to determine if an SNS is
connected. SNS functionality is limited to turning on and off only. The SNS ENR data and
temperature cannot be queried, unless the Noise Figure application is installed. The SNS ENR
data is issued in printed form when an SNS is purchased or can be read from the analyzer’s
Noise Figure application if installed, or other Agilent noise figure instruments that support the
SNS (NFA and ESA with option 219).
When first entering the Swept SA measurement the “State” will be set to OFF and the 28v BNC
drive and SNS turned off to ensure the two are in sync. When the Swept SA measurement is
exited, the “State” parameter will be set to OFF and the 28v BNC and SNS drive turned off.
For making manual noise figure measurements the following setup is recommended:
•
Set the SPAN to Zero
•
Set attenuation to 0 dB
•
Set the PRE-AMP ON
•
Set the RBW to 4MHz
•
Set the Detector to AVERAGE
•
Set the sweep time to 16ms - sets the variance correctly for good results.
•
Set a Band/Interval Power Marker function and set the interval over the full width of trace i.e.
Left to 0s and Right to 16ms
State
This key turns the Noise Source on and off.
Key Path Meas Setup
Remote Command :SOURce:NOISe[:STATe] ON|OFF|1|0
:SOURce:NOISe[:STATe]?
Example SOUR:NOIS OFF
858 Remote Language Compatibility Measurement Application Reference