Boonton 4240 RF Power Meter - Manual (Page 50)

Boonton 4240 Series RF Power Meter
4.3 Dynamic Range
The hold range mode is useful when
he hold range mode
is active when a specific instrument ect nge of this mode is
limited by the zero offset and the reso ee t the useful dynamic
nge is 20 dB if the error is to be kep for e measured value is
Figure 4-3 Thermal Sensor Decay
it is known that the signal will vary over a certain limited range. (T
range, other than autorange, has been sel ed.) The dynamic ra
lution, as shown in Figure 4-4. It can be s n from this figure tha
t below 0.1 dB. An asterisk is displayed be e the channel when th ra
below the lower range limit indicating an uncalibrated measurement.
Figure 4-4. Extended Hold Range Mode
Operation
4-4