Agilent Technologies X Series Manual page 425

will be "<ch>: <probe id>", where "<ch>" is either "I" or "Q" and "<probe id>" is the type of probe. For
example, for the I Probe setup with an Agilent 1130A probe connected to the I port, the title will be "I:
1130A".
Probe calibration data is stored for each probe type for each channel. When no probe is sensed, the probe
type "Unknown" is used, and this is also treated like a probe type with its own calibration data. When a
probe is changed, the calibration data for that probe type for that port is restored. An advisory message
will be displayed showing the new probe type and the calibration status. The calibration data is stored
permanently (survives a power cycle) and is not affected by a Preset or any of the Restore commands.
When the probe has EEPROM identification (most newer Agilent probes have this), the calibration data
is stored by probe serial number and port, so if you have two probes of the same type, the correct
calibration data will be used for each. For probes that do not have EEPROM identification, the
calibration data is stored by probe type and port and the instrument cannot distinguish between different
probes of the same type. In all cases (with or without EEPROM identification), the calibration data is
port specific, so it will not follow a specific probe from port to port if the probe is moved.
The "Unknown" probe type is used whenever no probe is sensed. When no calibration data exists for
"Unknown" the latest cable calibration data is used (see Section
Attenuation
The attenuation is part of the calibration data stored with the probe type and is initially the value that was
returned by the last calibration. You can modify this value and any changes will be stored with the
calibration data and will survive power cycles and presets. When a probe calibration is performed the
attenuation value will be overwritten by the calibration.
Key Path
Remote Command
Example
Notes
Preset
State Saved
Range
Initial S/W Revision
Input/Output, I/Q, I Setup | Q Setup, I Probe | Q Probe
[:SENSe]:CORRection:IQ:I|Q:ATTenuation:RATio <real>
[:SENSe]:CORRection:IQ:I|Q:ATTenuation:RATio?
Set the attenuation for the current I probe to 100.00:1.
CORR:IQ:I:ATT:RAT 100
Each probe type has its own attenuation setting. As probes are changed the
attenuation value will reflect the new probe's setting. Changing the attenuation
affects only the current probe type's setting and leaves all others unchanged.
When the IQ Path is I+jQ, the Q probe attenuation setting must match the I
Probe attenuation setting within 1 dB. If this is not the case, an error condition
message is generated, 159;Settings Alert;I/Q mismatch:Attenuation.
Each probe type has its own default. The default for the "Unknown" probe
type is 1:1.
Saved with probe calibration data. It survives a power cycle and is not affected
by a Preset or Restore.
0.001 to 10000
Prior to A.02.00
"I/Q Guided Calibration" on page
Input/Output
470).
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