Chapter 3 — Performance Verification 3-4 Input Range Verification
ML248xx, ML249xA MM PN: 13000-00164 Rev. K 3-3
Range Data Interpretation
The tabular data consists of the values read by the meter for each range, with one measurement taken at each
end of each range. For each of these measurements, there is an expected value as shown in Table 3-1. The
measured value is given a pass or fail depending on how close it is to the expected value. The limits for pass
and fail are shown in Table 3-2.
The Range Calibrator measures the “Zero” level, and the “Upper” and “Lower” limits of each of the ranges (both
channels on a dual-channel meter). To calculate the dB Error Figure for each level, subtract the expected level
from the measured level.
6. The Data from the power meter display can be entered into an excel spreadsheet (*.xls) to verify the
measurements. The part number of this spreadsheet is 63153. Contact your nearest Anritsu Customer
Service or Sales center for an electronic copy of this spreadsheet.
7. Record the data from the spreadsheet to the test record tables “Measurements and Calculated Error
Figure” on page A-2 and “Error, Linearity and Range Change Calculations” on page A-3).
8. To exit the range calibrator mode, disconnect the sensor cables. The power meter is reset to the default
mode.
Table 3-1. Range Data Expected Output Levels
Range Abbreviation Expected output levels
Range 1 Upper Level R1U –0.9540 dB
Range 1 Lower Level R1L –11.8342 dB
Range 2 Upper Level R2U –11.8342 dB
Range 2 Lower Level R2L –25.7741 dB
Range 3 Upper Level R3U –25.8606 dB
Range 3 Lower Level R3L –41.8031 dB
Range 4 Upper Level R4U –41.8031 dB
Range 4 Lower Level R4L –57.8139 dB
Range 5 Upper Level R5U –57.8139 dB
Range 5 Lower Level R5L –61.7260 dB
Range 7 Upper Level R7U –0.9540 dB (ML2487/8B and ML249xA only)
Range 7 Lower Level R7L –11.8342 dB (ML2487/8B and ML249xA only)
Range 8 Upper Level R8U –11.8342 dB (ML2487/8B and ML249xA only)
Range 8 Lower Level R8L –16.8965 dB (ML2487/8B and ML249xA only)
Range 9 Upper Level R9U –16.8965 dB (ML2487/8B and ML249xA only)
Range 9 Lower Level R9L –25.7741 dB (ML2487/8B and ML249xA only)
Note
If the spreadsheet is not available, calculate and record the data using the test records on pages A-2
and A-3.
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