Last Updated: August 29, 2007
The set up of general operating conditions includes setting the amplitude offsets, and configuring the display mode. Refer to the following sections:
For more information on the conventions used in the programming examples click here.
To achieve accurate measurement results, it is important to account for losses or gains in the cabling and fixturing between the wireless device and test set. You must determine what the losses are for your test setup and then specify the appropriate frequency-dependent amplitude offset values.
You can specify amplitude offsets for up to 100 frequencies using the SYSTem:CORRection commands.
You must input a loss as a negative number and a gain as a positive number. For example:
If you determine that you have a cable loss of 3.5 dB, you would set this command to -3.5 dB.
If you determine that you have a gain in your fixturing of 5 dB, you would set this command to 5 dB.
To achieve a slightly faster test execution speed, you can disable the front panel display on the test set using the DISPlay:MODE:TRACking[?] command.
The following example shows how to set the amplitude offsets.
' Set offset frequencies and set the state to On for the frequencies, offsets and RF Amplitude Offset State.
TestSet.WriteString("SYSTem:CORRection:SFRequency 1710.2 MHZ,1805.2 MHZ,1784.8 MHZ,1879.8 MHZ")
' Set offset values correcting for losses in dB.
TestSet.WriteString("SYSTem:CORRection -2.55,-3.12,-3.68,-4.23")
The following example shows how to set the test set's display mode.
' Turn the tracking mode to Off.
TestSet.WriteString("DISPlay:MODE:TRACking OFF")
Go to Step 5. Configure test set and wireless device parameters