11 APD Measurement
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two different corrections may be applied. It is expected that in the corrections data itself, there will be TWO
corrections values exactly at Max Freq, otherwise Overlap is ignored. The way the overlap is processed is
as follows: if at any given time the current analyzer Start Freq is greater than Freq 1 and lower than Freq 2,
and the current Stop Freq is greater than Freq 2, extend the first correction point at or above Freq 2 down
to Freq 1, rather than using the correction data between Freq1 and Freq2.
The Antenna Unit row can only be used in Correction register 1, because there can only be one setting for
Antenna Unit at any given time. If a Correction whose Antenna Unit is set to anything but None is loaded
into any Correction register but 1, an error is generated (Mass storage error; Can only load an Antenna Unit
into Correction 1). When a correction file is saved from any Correction register but 1, Antenna Unit is
always written as None.
Similarly, the Bias rows can only be used in Correction register 1, because there can only be one setting for
Bias at any given time. If a Correction file with a Biasor Bias State row is loaded into any Correction register
but 1, an error is generated: Mass storage error; Can only load Bias Settings into Correction 1
The data follows the DATA row, as comma separated X, Y pairs; one pair per line.
For example, suppose you have an Antenna to correct for on an N9020A version A.02.06 and the correction
data is:
• 0dB at 200MHz
• 17dB at 210MHz
• 14.8dB at 225MHz
Then the file will look like:
• Amplitude Correction
• "Correction Factors for 11966E"
• "Class B Radiated"
• A.02.06,N9020A
• P13 EA3 UK6,01
• Frequency Unit,MHz
• Antenna Unit,dBuV/m
• Frequency Interpolation,Linear
• DATA
• 200.000000,0.00
• 210.000000,17.00
• 225.000000,14.80
The choices for the 1 of N fields in the metadata are as follows:
• Frequency Unit: Hz, kHz, MHz, GHz
• Antenna Unit: dBuv/m, dBuA/m, dBG, dBpT, None
EMI Receiver Mode Reference 989
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