Keysight M1970 Series, User Manual

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2 Operation
30 Keysight M1970 Series User’s Guide
Amplitude calibration
The M1970 Series mixers automatically download a conversion loss file to the
signal analyzer, and this conversion loss table is used to correct the measured
amplitude. It is not possible to view or edit the conversion loss file. The Certificate
of Calibration that is provided with each mixer lists the conversion loss measured
at the factory.
LO adjustment
The LO adjustment will run each time the USB connection is made, and if the
signal analyzer Alignments are set to Normal, the LO adjustment will be
performed based on time and temperature rules similar to the other signal
analyzer alignments. Both the mixer and the spectrum analyzer temperature
sensors are monitored by the alignment algorithm. If the Alignment is set to OFF,
the LO Alignment will not be performed based on time and temperature, and it
will be necessary for the user to determine when to perform alignments.
To manually trigger an LO alignment from the front panel, press
System ,
Alignments , Align Now , External Mixer .
Viewing the external mixer setup screen
The mixer setup screen contains information such as the mixer serial and model
numbers, harmonic mixing used, and status of the mixer connection. When the
USB mixer is connected, the Mixer Preset, Mixer Bias, and Edit Harmonic Table
keys are grayed out since these keys do not apply. However, if you unplug the
USB cable, the Mixer Presets key will become functional and the connection
status will show USB Mixer not connected.
To view the setup screen, press
Input/Output , External Mixer , Ext Mix Setup .