:CHANnel:SCRecovery:PLLoop:OJTF:DFACtor
Instrument:
UXR Scope
Meas. mode:
Scope
Eye
Flex Apps:
FlexDCA
FlexRT
Command Syntax
:CHANnelN:SCRecovery:PLLoop:OJTF:DFACtor <factor>
<factor> is a double.
Where N identifies a specific channel and must be selected from {1:8}{A|B|C|D}. For example, CHANnel3C.
Query Syntax
:CHANnelN:SCRecovery:PLLoop:OJTF:DFACtor?
Description
For the selected channel's software clock recovery, 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 |
Before this command can take effect, you must disable shared acquisition parameters with the :CHANnel:RTSCope:TRACkcommand.
Requires FlexDCA revision A.06.70 and above.