Keysight EXG and MXG X-Series Signal Generators User’s Guide 309Digital Signal Interface Module (Option 003/004)Operating the N5102A Module in Output Mode11.Press the Clock Polarity Neg Pos softkey to Neg.This shifts the clock signal 180 degrees, so that the data starts during the negative clocktransition. This has the same affect as selecting the 180 degree phase adjustment.12.Make the clock polarity selection that is required for the device being tested.13.Press the Return hardkey to return to the first-level softkey menu.The clock source selection is also reflected in the first-level softkey menu graphic. Forexample, if the device is the new clock source, the graphic will show that the frequencyreference is now connected to the DUT and the DUT has an input clock line going to theN5102A module.Generating Digital DataPress the N5102A Off On softkey to On.Digital data is now being transferred through the N5102A module to the device. The green statuslight should be blinking. This indicates that the data lines are active. If the status light is solidlyilluminated (not blinking), all the data lines are inactive. The status light comes on and stays on(blinking or solid) after the first time the N5102A module is turned on (N5102A Off On to On). Thestatus light will stay on until the module is disconnected from its power supply.The interface module can only be turned on while a modulation format is active. If the modulationformat is turned off while the module is on, the module will turn off and an error will be reported.If changes are made to the baseband data parameters, it is recommendedthat you first disable the digital output (N5102A Off On softkey to Off) toavoid exposing your device and the N5102A module to the signalvariations that may occur during the parameter changes.
