Keysight x-series Instruction Manual

8 Trigger
8.1 Trigger
8.1.1.7 External 3
When External 3 is selected, a new sweep/measurement starts when the external
trigger condition is met using the TRIGGER 3 IN input connector on the rear panel.
This control only appears in certain instrument and option combinations, as follows.
–
For N9042B, selects the Precision External Trigger, but available only when IF
Path is 255 MHz or wider. The resolution will be within one sample count of the
4.8GHz ADC sampling rate for 255 ~ 2 GHz IF Paths, and within one sample
count of the 10.2GHz sampling rate for the 4 GHz IF Path
–
For all other instruments, available only if Option H1G is installed. It is only
available when the 1 GHz path is chosen, either directly or indirectly; in all other
paths it is visible but grayed-out. Direct and indirect selection of the 1 GHz path
occurs as follows:
–
Direct: Measurements that directly support the 1 GHz path have a 1 GHz
selection in the IF Path menu in Meas Setup
–
Indirect: Certain measurements, such as Power Statistics CCDF (PST), always
choose the widest available path, and so will choose the 1 GHz path if it is
available, even if there is no IF Path menu for the measurement. External 3
will be visible when this results in the 1 GHz path being selected, even if
there is no control or readout indicating that the 1 GHz path has been
selected
For a full list of Modes and measurements that support External 3, see "External 3
Support" on page 2318 in the section "Select Trig Source" on page 2315.
When External 3 is set, and then becomes disabled because you switched away
from the 1 GHz path, the Trigger Source selection reverts to the default ("Free Run"
on page 2328).
When External 3 Trigger is selected, the Trigger tab displays the following Trigger
Source dependent controls:
–
"Prot Frame Aligned" on page 2340
–
"Trigger Delay" on page 2343
–
"Trigger Slope" on page 2347
Additional controls are also present that are not dependent on the selected Trigger
Source.
Example
:TRIG:SPEC:SOUR EXT3
Sets External 3 as the trigger source for the Complex Spectrum measurement
Annunciation External 3 (in the Meas Bar)
Short Range Comms & IoT Mode User's &Programmer's Reference 2332

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)