:TIMebase:DESKew:FIXTure
Command Syntax
:TIMebase:DESKew:FIXTure
Description
For N1045A and 86118A-H01 modules, starts the automated Fixture Deskew which deskews any number of channels using a guided procedure that applies the same signal to each input in multiple steps. Skew contributed by the fixture is removed from the measurement with any remaining skew due to the DUT and transmitter. It does not include any skew that is internal to the device-under-test. The skew is calibrated to the measurement reference plane. Fixture Deskew places the N1000A in Oscilloscope Mode for the duration of the procedure.
At the completion of the test, the deskew values can be saved to an instrument setup file (.setx) using the :DESKew:FIXTure:SAVe and :DESKew:FIXTure:FNAMe commands.
When the procedure starts, you must select the channels that you want to deskew. Because Fixture Deskew requires single-valued waveforms, the N1000A is placed in Oscilloscope Mode for the duration of the procedure.
Requires FlexDCA revision A.02.00 and above.
When measuring each channel, the exact same cables, connectors, and clock source must be used.
The N1045A module's RF inputs are very sensitive to ESD . The 1.85 mm RF connectors require special care.
Example
This example deskews the signals on two channels: 3A and 3B. You must test for the successful completion of each step when a decision dialog should be displayed and the user must take an action such as select a channel or click a NEXT or CANCEL button. The equivelent of these buttons is the :DESKew:FIXTure:CONTinue and :DESKew:FIXTure:CANCel commands.
:TIMebase:DESKew:FIXTure :TIMebase:DESKew:FIXTure:SDONe? // Detect step 1 completion// Your code to test for Select Channels dialog … :CHAN3A:DISPlay ON // Select Channel 3A :CHAN3B:DISPlay ON // Select Channel 3B :TIMebase:DESKew:FIXTure:CONTinue :TIMebase:DESKew:FIXTure:SDONe? // Detect step 2 completion// Your code to test for Connect Channel 3A dialog. … :TIMebase:DESKew:FIXTure:CONTinue :TIMebase:DESKew:FIXTure:SDONe? // Detect step 3 completion// Your code to test for Connect Channel 3B dialog. … :TIMebase:DESKew:FIXTure:CONTinue :TIMebase:DESKew:FIXTure:SDONe? // Detect step 4 completion// Your code to test for Fixture Deskew Completed dialog … :TIMebase:DESKew:FIXTure:SAVe ON // Select to save State file :TIMebase:DESKew:FIXTure:FNAMe "D:\User Files\Setups\Setup_Test_4.setx" // Enter State filename :TIMebase:DESKew:FIXTure:CONTinue *OPC? // Wait for Fixture Deskew to complete :DISK:SETup:SAVe "D:\User Files\Setups\Setup_Test_4.setx" // Save file and end test