Fluke 8588A - RF Power Softkeys

8588A/8558A
Operators Manual
52
Table 13. Setting Limits for Reference Level Units
Parameter Min Max
dBm -99 +99
Watts 100.03 fW 9.9997 MW
Vrms 2.2364 μV rms 22.358 kVrms
Vpk-pk 6.326 μVpk-pk 63.24 kVpk-pk
dBμV -6.991 dBμV 206.988 dBV
RF Power Softkeys
This section explains the RF Power softkeys.
 (Reading): Chooses between Absolute or Relative. The default is
Absolute. Relative shows measurements relative to the reference level. In
relative, the displayed reading is the absolute reading minus the reference level.
 (Last Reading): Pushing  sets the reference level to the reading
that is currently displayed. The Last Reading feature is useful to check the
flatness of a generator relative to a reference frequency output.  works the
same way in both absolute and relative modes, that is, it takes whatever is
displayed and makes that the reference level.
 (Average): Determines the averaging factor applied by the RF power
sensor. When set to Auto, the power sensor continuously determines the
averaging factor which depends on the power level with a maximum settling time
of 4 seconds for the sensor’s averaging filter. Alternatively, a specific averaging
factor value between 1 and 32768 in a 2
n sequence may be selected. Use the
navigation keys to select the averaging factor.
Use the cursor keys or the softkeys to choose:
• Auto
• 1
• 2
• 4
• 8
• 16
• 32
• 64
• 128
• 256
• 512
• 1024
• 2048
• 4096
• 8192
• 16384
• 32768
 (Units): Readings with these units: dBm, Watts, Vrms, Vp-p and dBμV.
The units are changed with the navigation keys or corresponding softkeys. The
default unit is dBm. The Product keeps the last units used until the Product is
powered off.
Note
Display of readout values in linear units of watts or volts may use W,
mW,
μ W or V, mV, or μ V depending on the measured value.