:DIFF Subsystem

Instrument:

DCA-X

DCA-M

Meas. mode:

Scope

Eye

Jitter

TDR

Flex Apps:

FlexDCA

FlexRT

The DIFF subsystem commands control differential electrical waveforms. In the :DIFF command syntax, differential waveforms are identified by the associated module slot number (from 1 to 4). For example, this command sets the color of the differential waveform of an 86112A module installed in slots 3 and 4. Notice slot number 3A highlighted in red.

:DIFF3A:COLor TCOLor8

Traditional modules take up two module slots, either slots 1 and 2 or slots 3 and 4. For these type of modules, the differential waveform is identified using the number for the left-mode occupied slot. For example, :DIFF1A or :DIFF3A, respectively.

Single-slot modules could have two channels. In this case, the differential waveform of a module installed in slot 4 would be identified as :DIFF4A. Also, when FlexDCA is configured with a simulated extended module, one-slot simulated modules are available that have two channels. The following table show several examples of differential waveform identification.

Examples of Differential Waveform Numbers
Module Type	Installed Slots	Source Channels for Differential Waveform	Differential Channel Waveform Identification
Traditional Two-Slot, Dual Channel (for example, 86112A)	1 & 2	1A and 2A	`:DIFF1A`
Traditional Two-Slot, Dual Channel (for example, 86112A)	3 & 4	3A and 4A	`:DIFF3A`
Simulated or Future Single-Slot, Dual Channel	1	1A and 1B	`:DIFF1A`
	2	2A and 2B	`:DIFF2A`
	3	3A and 3B	`:DIFF3A`
	4	4A and 4B	`:DIFF4A`

Example Command Sequence

:DIFF1:DEMODe ON
:CHANnel1A:BANDwidth BANDwidth3
:CHANnel1B:BANDwidth BANDwidth3
*OPC?
…  //  Your code to synchronize execution timing.
:DIFF1:DISPlay ON