5Key Reference
128 N9342C/43C/44C User’s Guide
such as an amplifier. Now replace the thru line
with the device under test, and an accurate
measurement of the gain or loss can be made.
• Norm Ref Lvl
Sets the level (in dB) of the normalized
reference.
• Norm Ref Posn
Offsets the displayed trace without affecting the
instrument gain or attenuation settings. This
allows the displayed trace to be moved without
decreasing measurement accuracy.
• Ref Trace
Allows you to view or blank the reference trace
on the display.
Power Meter
Key access: [MODE] > {Power Meter}
Use the arrow keys to highlight the mode.
Select this mode, and press [ENTER] to make a
measurement using the power meter function.
When selected, the Power Meter softkey menu will
be displayed and many of the instrument hardkeys
will be disabled as they are not necessary for this
mode.
Zeroing
Key access: [MODE] > {Power Meter}
Access the associated Zeroing submenu.
• Zeroing
Make a Zero operation of the power sensor.
The U2000 Series USB Power Sensors have their
sensor calibration tables stored in non- volatile
memory which means that the reference
calibration factor is automatically loaded upon
power- up.
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