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78 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 3 Hz to 26.5 GHz
3 Using the Agilent Synthetic Instrument GUI
• G - 140 to 220 GHz
• Y - 170 to 260 GHz
• J - 220 to 325 GHz
Harmonic A user defined frequency band. Limits are −50 to −1 or 1 to 50.
Mixer Bias Turns on/off the mixer bias and adjusts an internal bias source for use with
external mixers. The bias signal is present on the center conductor of the IF INPUT
connector on the front panel.
Bias Level Sets the bias level. Limits are −10 mA to 10 mA.
Calibration
Accesses the Align system and immediately executes an alignment cycle of all the
subsystems (Align RF, Align IF, Align ADC, and Align Current Sys Gain). The instrument will
change any current system settings currently underway, perform the full alignment, and
then return to the current system settings that were in place before the calibration began.
A calibration nominally takes 35 seconds to perform.
The N8201A downconverter will meet its specifications when:
• It is stored a minimum of two hours within the operating temperature range and turned
on for at least 30 minutes followed by a calibration.
• When a calibration has been performed within the past 24 hours or when the
temperature changes 3 °C.
• The front panel 1
st
LO OUT connector is terminated with a 50 ohm load.
Events (Settling Events and Event Logging)
Settling Event
Allows you to define the parameters of the Settling Event. The Settling Event has a positive
edge when the frequency is set and a negative edge when the system is stabilized.
Settling Channel
Selects the channel to configure. Possible values are:
LXI0 LXI1 LXI2 LXI3
LXI4 LXI5 LXI6 LXI7
LAN0 LAN1 LAN2 LAN3
LAN4 LAN5 LAN6 LAN7