222 Chapter 3
Mode
Distance To Fault
Mode
Reference Level
Sets the reference level value used for amplitude measurements. In the Distance to Fault
measurement, this Reference Level represents return loss in dB.
Example of conversion between a “VSWR” and a “Return Loss”
VSWR = 1.01 => Return Loss = 46.1 dB
VSWR = 6 => Return Loss = 2.9 dB
Changing the value of the reference level changes the absolute return loss level of the top
graticule line. The reference level (in selected amplitude units) can be set with the step
keys, knob, or numeric keypad.
Scale/Div
Sets the logarithmic units per vertical graticule division on the display.
FREQ/Channel
Mode Stimulus/Response
Preset 1 dB
State Saved Saved in State
Range –10 dB to 150 dB
Key Path
AMPTD Y Scale, Reference Level
Mode Stimulus/Response
Preset 1 dB
State Saved Saved in State
Range 1 to 20
Key Path
AMPTD Y Scale, Scale/Div
Mode Stimulus / Response
Key Path Front-panel key
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