Latency Calibration Commands; Calibrate:sync:input:level; Calibrate:latency:lcmperiod - Keysight Technologies M8131A User Manual

7 Remote Programming

Latency Calibration Commands

:CALibrate:SYNC:INPut:LEVel

:CALibrate:LATency:LCMPeriod

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The Latency Calibration commands are used to initialize the deterministic
latency in the data path between the M8131A digitizer and another
module connected via ODI links, for example a DSP or an AWG.
The digitizer, as the module connected upstream in the data path, will be
referred to as the master in the command description. The module
connected downstream in the data path will be referred to as the slave.
For deterministic latency initialization, a defined sequence of commands
must be sent to master and slave. Refer to
Deterministic Latency to DSP Module
The Latency Calibration commands are also used to initialize the Sync Out
to Sync In connection of multiple M8131A digitizer modules operating as a
synchronous system. The digitizer sending out trigger pulses on Sync Out
will be referred to as the master in the command description. The modules
receiving trigger pulses on Sync In will be referred to as slaves. For the
initialization of a synchronous system, a defined sequence of commands
must be sent to master and slave. Refer to
Modules
Command
:CALibrate:SYNC:INPut:LEVel <level>
Description This command sets the threshold level of the Sync In. The threshold level is
set by default to the optimum voltage level to match the output voltage
range of the Sync Out of the M8131A or M8132A. Do not change the Sync
In threshold when connected to a Sync Out of the M8131A or M8132A.
<level> The threshold level in V.
Query
:CALibrate:SYNC:INPut:LEVel?
Description This query returns the current threshold level of the Sync In.
Command
:CALibrate:LATency:LCMPeriod <lcm_period>
Description This command sets the Least Common Multiple (LCM) period value to be
used for core clock phase alignment. On the master module, this value
determines the frequency of the signal sent out at the Sync Out. On the
slave module, this value determines the frequency of the signal used to
compare with the signal received at the Sync In. The formula for the
frequency is:
on page 184.
Keysight M8131A 16/32 GSa/s Digitizer User's Guide
Continuous Streaming with
on page 187.
Synchronization of Two M8131A