:TIMebase:SCRecovery:PLLoop:OJTF:DFACtor
Instrument
N1000A
N109x
Flex Apps:
FlexDCA
Meas. mode:
Scope
Eye
Jitter
Command Syntax
TIMebase:SCRecovery:PLLoop:OJTF:DFACtor <factor>
<factor> is a double.
Query Syntax
TIMebase:SCRecovery:PLLoop:OJTF:DFACtor?
Description
Defines the Damping Factor of a second-order PLL's Observed Jitter Transfer Function (OJTF). The following table shows the damping factor settings for some standards.
OJTF for 2nd Order PLLs
| Standard | Damping Factor |
|---|---|
| SAS 1.5 Gb/s | 50.0 |
| SAS-SSC 1.5 Gb/s | 0.860 |
| SATA 1.5 Gb/s | 0.767 |
| SAS 3.0 Gb/s | 50.0 |
| SAS-SSC 3.0 Gb/s | 0.860 |
| SATA 3.0 Gb/s | 0.860 |
| SAS 6.0 Gb/s | 50.0 |
| SAS-SSC 6.0 Gb/s | 0.860 |
| SATA 6.0 Gb/s | 0.767 |
| QPI | 0.800 |
| USB 3.0 | 0.707 |
This acquisition setting is automatically shared with all UXR oscilloscope input channel waveforms. To independently configure for specific channels, use the :CHANnel:RTSCope:TRACk command.
Requires FlexDCA revision A.06.70 and above.