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Chapter 1 Getting Started
Operating the Counter
Operating Guide 1-23
1
Selecting the Unit of Measurement for Power
The Counter’s power-measurement function can display values in either
of two sets of units of measurement—dB and dBm or W, mW, and µW
(the Counter automatically selects the most appropriate unit when either
set of units is selected). Use the procedure in the following diagram to
select the unit of measurement for power (this procedure assumes that a
signal is currently applied on Channel 2 and that power is being displayed):
NOTE The Counter is specified for signals having amplitudes of up to +7.00 dBm.
If a signal having an amplitude greater than +9 or +10 dBm is applied,
and power measurement is enabled, the annunciators for the power
reading display “HI” to indicate that the signal’s amplitude exceeds the
specification. If a signal having an amplitude of less than –40.00 dBm is
applied, the power annunciators display “LO” to indicate that the signal
level is too low to be measured by this instrument.
CAUTION The Channel 2 input path circuits contain sensitive GaAs semiconductors.
To prevent damage to these components, always adhere to standard ESD
(Electro-Static Discharge) prevention procedures, and ensure that the
maximum power specification for this channel (+27.00 dBm) is not exceeded.
Display
Power
dBm/W
Shift
Ch 2
Freq
Pwr
mW
Shift
Ch 2
Freq
Pwr
dBm
Ch 2
Freq
Pwr
dBm