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Appendix G: Calibration
VX4101A MultiPaq Instrument User Manual
G–17
Digital Time Interpolation. To calibrate the Digital Time Interpolation, do as
follows:
1. Connect the function generator for a square wave at ±0.5 V ±0.1 V @10
MHz to the channel 1 input (50 W load impedance).
2. Send the command:
CALibrate:DTI
This command takes approximately 16 seconds to execute.
Cross Channel Delays. To calibrate the cross channel delays, do as follows:
1. Using a 50 W RF splitter and equal length cables, connect the function
generator to both the Channel 1 and Channel 2 inputs. Set up the function
generator for a 10 MHz square wave at ±2.0 V ±0.1 V (±0.5 V at each 50 W
input).
2. For determining the channel 1 cable delay, send the command:
CALibrate1:DELay
This command takes approximately 3 seconds to execute.
3. For determining the channel 2 cable delay, send the command:
CALibrate2:DELay
This command takes approximately 3 seconds to execute.
4. For determining the channel 1 to 2 cross channel delay, send the command:
CALibrate:DELay 12
This command takes approximately 3 seconds to execute.
5. For determining the channel 2 to 1 cross channel delay, send the command:
CALibrate:DELay 21
This command takes approximately 3 seconds to execute.
NOTE. If an invalid input signal is present, these commands will timeout and
generate an error after approximately 5 seconds.