# :MARKer:Y:SOURce

:MARKer Tracking Commands

- :MARKer:X:POSition
- :MARKer:X:SOURce
- :MARKer:X:SOURce:DUT
- :MARKer:X:SOURce:SPARameter
- :MARKer:X:SOURce:TYPE
- :MARKer:Y:SOURce
- :MARKer:Y:SOURce:DUT
- :MARKer:Y:SOURce:SPARameter
- :MARKer:Y:SOURce:TYPE
- :MARKer:Y:STATe
- :MARKer:REFerence

## Command Syntax

    :MARKer:YN:SOURce {CHANnel{N} | DIFF{1:4} | FUNCtion{1:64} | WMEMory{1:8} | TRACe{1:128}
       | ECHannel{N} | EDIFf{1:4} | EFUNction{1:64} | EWMemory{1:8} | CGMemory{1:8}}

In the command syntax, Y1A, Y2A, Y3A, and Y4A select the marker.

Real-time eye sources are available for manual line markers only.

## Query Syntax

    :MARKer:YN:SOURce?

## Description

Selects the source waveform for one of four tracking markers. Using the `:MARKer:X:SOURce` command achieves the same result. Sources can be channels, differential waveforms, functions, traces, and waveform memories.

This command has no effect on manual line markers.

## Example Command Sequence

This example illustrates how to use all of the marker related commands and, as a result, is not presented as a best measurement practice. The example uses a tracking marker, manual line X marker, and manual line Y marker. Because a tracking marker is used, the waveforms must be single-valued. You could also turn on two tracking markers and read the delta values between them.

                      //  Configure Manual Line Marker X1
    :MARKer:X1:STATe MANual  //  Turn on marker
    :MARKer:X1:SOURce CHAN1_1  //  Assign marker to connection 1 channel 1 waveform
    :MARKer:X1:POSition 80E-12  //  Position marker to 80 ps
                      //  Configure Manual Line Marker Y1
    :MARKer:Y1A:STATe MANual  //  Turn on Y manual line marker 1.
    :MARKer:Y1A:SOURce CHAN1_1  //  Assign marker to connection 1 channel 1 waveform
    :MARKer:Y1A:POSition 120E-3  //  Position marker to 120 mv
    :MARKer:REFerence X1  //  Set markers X1 and Y1 as the reference
                      //  Configure Tracking Marker Pair 2
    :MARKer:Y2A:STATe TRACking  //  Turn on marker
    :MARKer:X2:SOURce FUNCtion3  //  Assign marker to FUNCtion3 waveform
    :MARKer:X2:POSition 200E-12  //  Position marker on screen

    …  //  Prompt tester to position marker on the waveform
                      //  Return Marker Table Measurements for Tracking Marker 2
    :MEASure:MARKer:DX2?  //  Return ΔPosition

    :MEASure:MARKer:IDX2?  //  Return inverse of ΔPosition

    :MEASure:MARKer:DY2A?  //  Return ΔMagnitude

    :MEASure:MARKer:Y2A?  //  Return Y2 Magnitude

## Child Commands

- `:MARKer:Y:SOURce:DUT`
- `:MARKer:Y:SOURce:SPARameter`
- `:MARKer:Y:SOURce:TYPE`