Keysight M1970 Series, Руководство пользователя

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Operation 2
Keysight M1970 Series User’s Guide 37
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 the
System
hardkey and then tap Alignments , Align Now , External Mixer .
Viewing the external mixer setup screen
The mixer setup screen contains information such as the model number, harmonic
mixing used, and status of the mixer USB connection. When the mixer is
connected, the Mixer Presets, mixer bias, and Table Type selections are grayed out
since these selections do not apply. However, if you unplug the USB cable, the
Mixer Presets selections become functional and the connection status will show
the USB Mixer not detected.
To view the setup screen, press the
Input/Output hardkey and tap External Mixer
Setup . Tap Close to exit this screen.