Rohde & Schwarz RTP044 - Displaying the Recovered Clock Signal

Jitter analysis and clock data recovery
R&S
®
RTP
1059User Manual 1337.9952.02 ─ 12
"Bandwidth"
Sets the PLL bandwidth. It defines the part of the spectrum that the
PLL can follow during synchronization. The PLL bandwidth is usually
defined by the transmission standard.
"Rel. band-
width"
Sets the relative bandwidth, that is the ratio of the nominal bit rate to
the PLL bandwidth.
Remote command:
CDR:SOFTware<m>:PLL:ORDer on page 2290
CDR:SOFTware<m>:PLL:BWIDth on page 2290
CDR:SOFTware<m>:PLL:RELBwidth on page 2290
CDR:SOFTware<m>:PLL:DAMPing on page 2291
Reverse lock
Available for "Algorithm" > "PLL".
Enables the reverse lock PLL algorithm. The signal is locked on the first edge.
Remote command:
CDR:SOFTware<m>:REVLockpll on page 2291
Initial phase
Available for "Algorithm" > "PLL".
Defines the phase reference for the first clock edge.
"First sample"
The first clock edge matches the first sample of the waveform at the
left border of the display.
"First data
edge"
The first clock edge matches the first edge of the data signal.
Remote command:
CDR:SOFTware<m>:SYNC on page 2289
Selected results
Available for "Algorithm" > "PLL".
The PLL requires some time to synchronize to the phase of the data stream. You can
select when the CDR algorithm returns clock edges:
"After initial
sync."
The clock edges of the synchronization time are discarded; results
are gathered after initial synchronization of the CDR. Thus, meaning-
ful TIE measurement results can be obtained.
"All"
All clock edges are used.
Remote command:
CDR:SOFTware<m>:RESults on page 2289
18.3.2 Displaying the recovered clock signal
The clock signal that is recovered by CDR can be displayed as a math waveform. The
generated waveform is time-correlated to the data waveform.
1. Prerequisite: Configure the CDR method.
Clock data recovery