Keysight N774-C & 8162-C Series User’s Guide
81
User Interface Reference
4
The power value in dBm or Watts is stored as the reference, that is:
REF = P
measured
where,
REF
is the reference, and
P
measured
is the absolute power level (see
How to Set the Calibration Offset
How to Reference Another Power Measurement Channel
You can use the reference mode to reference to another channel’s current
power level. If you choose this mode, the reference of the channel
continuously updates to the current power value measured by the other
channel.
The following equations describe how the power in dB is calculated if you
reference another channel:
or
where:
P
dB
is the relative power,
P
measuredA
is the absolute power level (see
on page 79) measured by the current port, and
P
measuredB
is the absolute power level (see
on page 79) measured by the port you choose to reference, and
REF
is the reference level in decibels (dB).
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