Agilent Technologies ESA Series User's/Programmer's Reference page 146

Front-Panel Key Reference
Sweep
The maximum sweep time is 4000 seconds for any set of conditions.
Refer to your instrument's appropriate Specifications Guide for more
information about Sweep Time and its relation to other instrument
settings.
Key Access:
Switches the analyzer between the continuous-sweep mode and the
Sweep
single-sweep mode. Pressing
Single Cont
single-sweep mode. Press
when in single-sweep mode. When
follows another as soon as it is triggered. Pressing
Type
continuous sweep.
Key Access:
Selects stimulus-response (SR) or spectrum-analyzer (SA) (default)
Auto Swp
auto-coupled sweep times. In stimulus-response mode, auto-coupled
Coupling
SR SA sweep times are usually much faster for swept-response measurements.
Stimulus-response auto-coupled sweep times are typically valid in
stimulus-response measurements when the system's frequency span is
less than 20 times the bandwidth of the device under test.
Key Access:
Requires Option 1D6 (Time Gate). Accesses the following menu keys
Gate
that allow you to setup various gate parameters:
Key Access:
Gate On Off
146
Sweep
Single
is set to ) or turning the power on, sets the sweep mode to
Factory
Sweep
Sweep
Sweep
Requires Option 1D6 (Time Gate). Turns the gate
function on and off. When set to
signal that is digitized is controlled by the gate
circuitry. The gate circuitry switches between two
states. When the gate is "open", the normal video signal
of the analyzer is passed through the video filters to the
peak detectors and digitizer of the analyzer. When the
gate is "closed", the video filters, peak detectors, and
digitizer are given a signal at the bottom of the display.
The gate function requires that a gate trigger signal be
connected to the
the rear panel. When the gate function is on, the state
of the gate appears at the
panel connector. A TTL high output indicates that the
gate is open. The gate out signal is only valid while the
analyzer is sweeping. Between sweeps, the gate out
signal is invalid. You can adjust the gate delay and gate
length using an oscilloscope to view the gate out signal.
The analyzer sweep time should be set to a large value
(50 sec) during the adjustment so that the gate signal is
puts the analyzer in
Sweep (Single)
on the front panel, to enable a sweep
is selected, one sweep
Sweep (Cont)
Preset
Gate (On)
GATE TRIG/EXT TRIG IN (TTL)
GATE/HI SWP OUT (TTL)
(When
Preset
, the video
input on
rear
Chapter 2