22–
9.1 Setting the Reference level
1. When is turned, the reference level changes.
(Refer to “9.3 Reference level setting range for each unit” for details.)
9.2 Switching units of amplitude axis
(dBµV/m and dBµA/m are optional. Refer to “19.4 Electric field
strength measurement” and “19.5 Magnetic field strength measurement” for details.)
1. Press to switching units to dBm.
Press to switching units to dBµV
Press to switching units to dBmV
Press to switching units to dBV
9.3 Reference level setting range for each unit
UNIT dBm dBµV dBmV dBV
MAXIMUM 10 117 57 -3
MINIMUM -40 67 7 -53
MINIMUM
(shifted trace data)
-60 47 -13 -33
“Unit that is able to use it with the measuring function”
* When the reference level is set between the “MINIMUM” and “MINIMUM (shifted trace data)”,
the trace in “MINIMUM” is shifted and displayed on a screen. When the reference level is set below to
the “MINIMUM”, the ATT display area is displayed as “S/W AMP”.
Calculation expression (conversion formula to and from dBm)
· A [dBµV] = 107+X [dBm] · B [dBmV] = 47+X [dBm] · C [dBV] = -13+X [dBm]
· D [dBµV/m] = 68.8/λ×√(X/Gar) [dBm] λ: Wavelength[m] Gar: Antenna absolute gain [times]
· E [dBµA/m] = 107+X+F [dBm] F: probe calibration coefficient * changes by frequency
UNIT dBµV/m (Electric filed strength measurement)
dBµA/m
(Magnetic field
strength measurement)
Setting AN301 AN302 AN303 AN304 AN305 AN306 PR 26M
MAXIMUM 143 146 148 150 137 159 160 to 203
MINIMUM 93 96 98 100 87 109 110 to 153
MINIMUM
(shifted trace data)
73 76 78 80 67 89 90 to 133
F1
F2
F3
F4
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