Rohde & Schwarz FSVA - 3.3.8.2 Using Active Probes for Input

Instrument Functions
R&S
®
FSVA/FSV
432Operating Manual 1176.7510.02 ─ 09
For details see "Digital Output" in the description of the R&S Digital I/Q Interface for the
base unit.
Remote command:
OUTPut:DIQ on page 772
Digital IQ Info
Displays a dialog box with information on the digital I/Q input and output connection via
the optional R&S Digital I/Q Interface (R&S FSV-B17), if available. The information
includes:
●
Device identification
●
Used port
●
(Maximum) digital input/output sample rates and maximum digital input/output
transfer rates
●
Status of the connection protocol
●
Status of the PRBS descewing test
For details see "Interface Status Information" in "Instrument Functions - R&S Digital I/Q
Interface (Option R&S FSV-B17)" in the description of the base unit.
Remote command:
INPut:DIQ:CDEVice on page 760
3.3.8.2 Using Active Probes for Input
When the input from the device under test requires high impedance, an active probe
can be connected between the device and the R&S FSVA/FSV.
With firmware R&S FSVA/FSV 1.61SP2 or newer, active probes from the R&S RT-ZS
series are supported when using the new probe adapter RT-ZA9.
When the probe has been connected to and recognized by the R&S FSVA/FSV, a pre-
defined "Generic Probe" transducer factor with 20 dB is automatically activated and the
unit of the spectrum analyzer is changed to dBμV. (The same applies after presetting
the instrument.) Then the system is ready to analyze circuit points that cannot be loa-
ded with the 50 Ω of the analyzer input, but require a higher impedance.
Optionally, the probe can be deactivated while remaining connected to the R&S FSVA/
FSV, for instance to analyze the digital input from the probe without considering the
transducer factor.
All RT probes (except for ZS10E) have a micro button. The action for the micro button
can be defined. Currently, either a single sweep or no action can be performed when
the button is pressed. By default, when you press the probe's micro button, the
R&S FSVA/FSV is set to single sweep mode and a single sweep is performed. This
allows you to start a measurement whilst applying the probe to a certain pin on the
board under test.
When using RT probes, consider the following:
●
Active probes require operating power from the instrument and have a proprietary
interface to the instrument.
●
The probe is automatically recognized by the instrument, no adjustment is
required.
Measurement Functions