:CRECovery:TOData

Command Syntax

:CRECoveryN:TOData  {ON | OFF | 1 | 0}

Where N identifies slot number {1:8} which is associated with clock recovery module. On 86108A modules, specify slot 1.

Query Syntax

:CRECoveryN:TOData?

Query Response

{1 | 0}

Description

Selects triggering on data instead of recovering the clock. The data is passed to the module's rear-panel via an AC coupled limit amplifier. Data rate and loop bandwidth settings are not adjustable. Triggering on the data is similar to not having a clock recovery module and using a splitter to divide the input signal and routing one portion to the front-panel trigger input.

While triggering on the data provides a quick method of checking the data waveform, be aware that the displayed response may be missing 75% of the data patterns. This happens because triggering occurs at either the 1-to-0 or 0-to-1 data transition, and, as a result, the triggering only occurs when a transition occurs in the data instead of triggering on any symbol period as with a clock. For example, consider a pattern such as 1111000. Only the transition between the 1-to-0 triggers the instrument. Transitions between adjacent lows and highs will not cause trigger events. The recovered clock will still be available at the module's Front Panel Recovered Clock Out even when set to trigger on the data.

Command Compatibility

• 86108A/B
• 83496B
• 83496A
• N4877A