Table 7. Effects of Digital Modulation
6
Power Measured (dBm)
Uncertainty (dB)
-60 to <-16
+0.080/-0.048
-16 to <+4
+0.088/-0.038
+4 to +20
+0.067/-0.055
Power Measurement
Measurement
Average power
Measurement resolution
0.01 dB maximum
Offset range
-100 dB to +150 dB
Averaging
Averaging mode
Auto, manual
Averaging type
Moving, repeat
Number of averages (manual)
7
1 to 65,536
Auto-averaging
Resolution
8
1 dB, 0.1 dB, 0.01 dB
Source
Time Slot mode: 1 to 128 slots; or Scope
mode: 1 to 16,384 data points
Continuous Mode
Duty cycle correction
0.001% to 100%
Aperture time
0.01 ms to 1 s
6
Measurement error with reference to a CW signal of equal power and frequency at 20 ºC to 30 ºC.
7
Maximum number of averages allowed in Continuous mode and Time Slot mode is 65,536. In
Scope mode, the maximum number of averages is equal to 16,777,216 divided by the number of
data points.
8
Averaging resolution of 0.001 dB is not available with the NI-568x SFP. This feature is only
available when using the NI-568x instrument driver. Averaging resolution is defined as the place
after the decimal to which the reading becomes stable.
USB-5683 Specifications
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© National Instruments
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