Power Meter Operation
Making Relative Measurements
Agilent E4419B User’s Guide 2-37
Making Relative Measurements
Relative mode allows you to compare any measurement result to a 
reference value. The relative reading can be displayed in either dB or % by 
pressing   and selecting either   or  . When the measurement 
result is displayed in % a prefix multiplier may be shown. 
Relative mode is window dependent and when enabled displays “Rel” in 
the window to which it’s applied.
Procedure
To set a reference value on the currently selected window:
1. Press .
2. Press   to use the current reading as the reference value. This 
allows you to compare any measurement result in dB or 
percentage (%). 
3.  is automatically set to “On” when   is pressed.
Successive measurements are now displayed relative to the reference 
value. The relative mode can be disabled and re-enabled simply by 
pressing .
dB %
Rel
Offset
Rel Off On Rel
Rel Off On
HP4402.book  Page 37  Thursday, November 30, 2000  1:39 PM