Keysight x-series Instruction Manual

8 Trigger
8.3 Gate Settings
Delay Until RBW Settled allows excellent measurements of gated signals, by
allowing the IF to settle following any transient that affects the burst. Excellent
measurements also require that the analysis region not extend into the region
affected by the falling edge of the burst. Thus, excellent measurements can only be
made over a width that declines with narrowing RBWs, which is achieved by
decreasing the gate length below the user setting by an amount equal to 2.53/RBW.
Therefore, for general purpose compensation, you will still want to change the gate
length with changes in RBW even if the gate delay is compensated. The
compensated Gate Length is limited by the instrument so that it will never go below
10% of the value shown on the Gate Length key, as otherwise the sweep times could
get very long. Anytime theGate Length and RBW values combine in such a way that
this limiting takes place, a warning is displayed . For measurements that contain
multiple sweeps with different RBW like SEM and SPUR, the smallest RBW is used
for this limiting.
Selecting Compensate for RBW Group Delay causes the gate delay to be increased
above the user setting by an amount equal to 1.81/RBW. This compensated delay
causes the GATE START, GATE STOP lines on the display to move by the
compensation amount, and the actual hardware gate delay to be increased by the
same amount. All the other gate lines (for example, MIN FAST) are unaffected. If the
RBW subsequently changes, the compensation is readjusted for the new RBW. The
value shown on the Gate Delay control does not change. Compensate for RBW
Group Delay also includes gate length compensation; the gate length itself is
adjusted as necessary to attempt to compensate for delay effects imposed by the
RBW.
Compensate for RBW Group Delay is similar to Delay Until RBW Settled but
compensates for the group delay of the RBW filter, rather than the filter settling
time. As the RBW gets narrow, this can allow the settling tail of the RBW to affect
the beginning part of the gated measurement and allow the beginning of the RBW
settling transient to affect the end of the gated measurement. These two effects are
symmetric because the RBW response is symmetric. Because the gate length is not
automatically compensated, some users might find this compensation to be more
intuitive than compensation for RBW settling.
8.3.11 Min Fast Position Query (Remote Query Only)
Queries the position of the MIN FAST line, relative to the delay reference (REF) line.
See "Gate View On/Off" on page 2366. If this query is sent while not in Gate view,
the MinFast calculation is performed based on the current values of the appropriate
parameters and the result is returned. Reading this value lets you set an optimal
gate delay value for the current measurement setup.
Example
:SWE:EGAT:MIN?
Backwards Compatibility
SCPI
[:SENSe]:SWEep:EGATe:MINFast?
Short Range Comms & IoT Mode User's &Programmer's Reference 2376

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)