:CRECovery:JSANalysis:ACQuire
Command Syntax
:CRECoveryN:JSANalysis:ACQuire {ON |OFF}
Where N identifies the slot number and must be selected from {1:8}. The slot number is associated with the N1060A, N1076A/B, N1077A, N1078A, or 86108B module with Option JSA. When an 86108B module is used, the slot number is always 1.
Query Syntax
:CRECoveryN:JSANalysis:ACQuire?
The query response is {1|0}.
Description
Turns on Jitter Spectrum Analysis (JSA) and clock recovery emulation. When JSA is turned on, the Jitter Spectrum Analysis Results table is shown on the display. To display the JSA Spectrum graph, use the :DISPlay:JSANalysis:SGRaph command.
To select one of three references from which to construct the jitter spectrum, use the :CRECovery1:JSANalysis:SPECtrum command. Child commands of the :SPECtrum command are used to return the jitter spectrum data.
Use the :CRECovery1:JSANalysis:INTegrate:F command to set the spectrum integration limits and the :CRECovery1:JSANalysis:FFTMagnitude:SMOothing and :CRECovery1:JSANalysis:FFTMagnitude:ECOunt commands to specify the amount of spectrum smoothing.
| Jitter Measurement | :MEASure Subsystem Query |
|---|---|
| TJ (rms) | :MEASure:CRECovery:TJ?
|
| DJ (rms) | :MEASure:CRECovery:DJ?
|
| RJ (rms) | :MEASure:CRECovery:RJ?
|
Requires FlexDCA revision A.01.70 and above.
Requires a clock-recovery module that has Option JSA (Jitter Spectrum Analysis and SW Clock Recovery Emulation).
Command Compatibility
- N1060A Option JSA
- 86108A/B Option JSA
- N107X-series Option JSA
Example Command Sequence
:CRECovery1:JSANalysis:ACQuire ON :CRECovery1:JSANalysis:SPECtrum INPut // select type of spectrum :CRECovery1:JSANalysis:INTegrate:F1 1.5E3 // lower frequency limit :CRECovery1:JSANalysis:INTegrate:F2 26.27E6 // upper frequency limit :CRECovery1:JSANalysis:FFTMagnitude:SMOothing AVERage // applies smoothing :CRECovery1:JSANalysis:FFTMagnitude:ECOunt 8