Teledyne LeCroy WavePro Automation Command User Manual

Page 225

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Automation Command and Query Reference Manual - Control Reference

BaseFrequency

Double

From 1 to 2e+012 step 1

Range

This is the value shown as "Data or Bit Rate" on the Clock Recovery dialog page. This value can be
automatically set using app.SDA2.CDR.FindBaseFrequency, or app.SDA2.FindFrequency. Note: if
you are using an separate reference clock, ie, if you have checked "Use Explicit Ref Clock", then this
value is the clock frequency times the Multiplier.

Description

CutOffDivisor

Integer

From 10 to 1000000 step 1

Range

This setting controls the bandwidth of a single-pole PLL emulation that can be selectd as PLL Type
"FC Golden". When set to the default value of 1667, the response is the "golden PLL" defined for
Fibre Channel. The value should be thought of as dividing the bit rate. For example, for a bit rate of
1GHz, 1e9/1667 = 599.88kHz. That value can be read in app.SDA2.CDR.PLLFrequency, when the
PLLType is "FC Golden".

Description

FindBaseFrequency

Action

See app.SDA2.CDR.BaseFrequency. This control does the same thing as app.SDA2.FindFrequency.

Description

PLL1TransportDelay

Double

From 0 to 1 step 1e-015

Range

For FB-DIMM, when two PLLs are required, this is the delay of the signal produced using the first PLL
before it is seen by the second PLL. This is meant to emulate a Tx PLL, the Tx sends a signal
through a channel, which is then seen by an Rx PLL.

Description

PLLCompensateForMissingEdges

Bool

This setting should normally be False, so that the PLL behaves as a real hardware PLL probably
would, that is, the bandwidth of the PLL is proportional the transition density of the signal. When this
control is set to True, we compensate for the transition density so that the PLL bandwidth does not
vary with transition density. (In firmware revisions through 6.0 this control was not revealed on the
SDA2 clock recovery dialog and can only be set using Automation.)

Description

RefClkSlope

Enum

SignalFrequency

Double

UsePLL

Bool

UseRefClk

Bool

1-211

918501 RevA

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