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Chapter 3 83
Setting the Mode
Mode Setup
Mode Setup
When you select a mode the instrument automatically presets settings
to defaults for that mode. These defaults apply to all measurements in
the mode.
Mode settings are persistent. When you switch from one mode to
another mode, the settings you have chosen for the modes will remain
active until you change them. This allows you to switch back and forth
between modes without having to reset settings each time. Presetting
the instrument will return all current mode settings to their default
values. Powering the instrument off and on will reset all mode settings
to their default values.
NOTE Before making measurements, it is important to set the parameters
under the mode setup key for the device to be tested. These parameters
are not saved when you preset or power the instrument off and on, so
you may want to save them in an instrument state for later use.
The
Mode Setup key accesses: (1) the Input key menu of features
including selecting inputs, changing input attenuation, and modifying
IF align settings, and (2) the
Trigger key menu which lets you to choose
trigger setup states for the instrument.
Input Keys
By pressing the Input key you access menus that select an input port,
adjust input attenuation, and adjust the IF align signal.
Activate an Input Port and Adjust Input Power
• Input Port key. The
Input Port menu key accesses a menu which
allows you to select one of the following input keys:
RF, 50 MHz Ref,
and
IF Align. These keys are explained below.
RF key. Use the
RF key to reactivate the RF input after a
different input has been activated. This is a 50
Ω connector.
50 MHz Ref key. Selects the internal 50 MHz CW reference
signal. The displayed signal amplitude will be
−25 dBm.
IF Align key. The IF align signal is an internal calibration signal
used during the auto align process.