:CRECovery:JSANalysis:PLLoop:OJTF:DFACtor
Instrument:
N1000A
N107x
N1060A
86108B
Flex Apps:
FlexDCA
Meas. mode:
Jitter
Package License:
L-RND
L-SNT
Waveforms:
NRZ
PAM4
Command Syntax
:CRECovery{1:8}:JSANalysis:PLLoop:OJTF:DFACtor <factor>
<factor> is a double.
Where the {1:8} specifier identifies a slot number. 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
:CRECovery{1:8}:JSANalysis: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 |
Command Compatibility
- N1060A Option JSA
- 86108A/B Option JSA
- N107X-series Option JSA
Requires FlexDCA revision A.01.70 and above.
Example Command Sequence
:CRECovery{1:8}:JSANalysis:PLLoop:OJTF:DFACtor 0.860