Agilent Technologies Signal Analyzer N9030a User Manual
Page 605
6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Input/Output
159;Settings Alert;I/Q mismatch:Differential.
Couplings
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 a differential probe is not sensed and Q Same as I is On, the value set for I will be copied to
Q. This key is disabled when Q Same as I is On.
Preset
Off
State Saved
On
This is unaffected by a Preset but is set to the default value on a "Restore Input/Output
Defaults" or "Restore System Defaults->All"
Range
Off | On
Initial S/W Revision
Prior to A.02.00
Q Input Z
Selects the input impedance for the Q channel. The impedance applies to both the Q and Q-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
Input/Output, I/Q, Q Setup
Remote Command
:INPut[1]:IQ:Q:IMPedance LOW|HIGH
:INPut[1]:IQ:Q:IMPedance?
Example
Set the Q channel input impedance to 1 MΩ
INP:IQ:Q:IMP HIGH
Notes
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.
Couplings
Input impedance is a built-in characteristic of a probe. Therefore, whenever a probe is sensed,
this key is disabled and the value is set to match the probe.
When no probe is sensed and Q Same as I is On, the value set for I will also be copied to Q. This
key is disabled when Q Same as I is On.
Preset
LOW
State Saved
On
Remote Language Compatibility Measurement Application Reference
605