Agilent Technologies X Series Manual page 419

Couplings
Preset
State Saved
Range
Initial S/W Revision
Remote Command
Notes
Preset
Initial S/W Revision
I Input Z
Selects the input impedance for the I channel. The impedance applies to both the I and I-bar ports.
The input impedance controls the hardware signal path impedance match. It is not used for converting
voltage to power. The voltage to power conversion always uses the Reference Z parameter. The
Reference Z parameter applies to both I and Q channels.
Key Path
Remote Command
Example
Notes
Some active probes include built-in differential capability. When one of these
probes is sensed, this key is disabled. Since the differential capability is
handled in the probe, the Analyzer will use only the main port and the key will
show that the Analyzer's Differential Input mode is Off (indicating that the
complementary port not in use).
When Q Same as I is On, the value set for I will also be copied to Q.
Off
Yes
This is unaffected by a Preset but is set to the default value on a "Restore
Input/Output Defaults" or "Restore System Defaults->All"
Off | On
Prior to A.02.00
:INPut[1]:IQ:BALanced[:STATe] OFF|ON|0|1
:INPut[1]:IQ:BALanced[:STATe]?
This backwards compatibility SCPI command was for an instrument without
independent settings for the I and Q channels. Therefore, it is tied only to the I
channel and does not provide an equivalent for the Q channel. For proper
operation of the backwards compatibility command Q Same as I should be set
to On.
OFF
Prior to A.02.00
Input/Output, I/Q, I Setup
:INPut[1]:IQ[:I]:IMPedance LOW|HIGH
:INPut[1]:IQ[:I]:IMPedance?
Set the I channel input impedance to 1 MΩ
INP:IQ:IMP HIGH
LOW = 50 Ω, HIGH = 1 MΩ
When IQ Path is I+jQ, the I Input Z setting must be the same as the Q Input Z
setting. If the settings of the two inputs do not match, an error condition
message is generated, 159;Settings Alert;I/Q mismatch:Input Z.
Input/Output
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