Keysight Technologies N9340B, User Manual

Page: 35 / 172

System and File
System Setting
29
External Reference (Ref)
Use the external reference function as follows:
1 Input a 10 MHz signal to the EXT TRIG IN/REF IN
connector.
2 Press [SYS] > {Setting} > {Input/Output Ref} to enable
the external reference signal input.
The analyzer then turns off its internal reference.
External Trigger (Trig)
When an external TTL signal is used for triggering
function, the analyzer uses the inner reference as
default.
Use the external trigger function as follows:
1 Press [SYS] > {Setting} > {Input/Output Trig} to enable
the external TTL signal input.
2 Press [SPAN] > {Zero Span} to activate the Trigger
function.
3 Access the associated softkeys to select the rising
edge (Ext Rise) or the falling edge (Ext Fall) as the
trigger threshold.
Adding an Option
Pressing [SYS] > {More} > {Option} > {Add Option} brings
up a dialog box for entering the option license code. Use
the numeric keypad to input the option license code and
then use the [ENTER] key as a terminator. If the analyzer
recognizes the option license code, a message
“Option
activated successfully” will appear in the status line.
Otherwise, a message
“Invalid option licence”
will
appear in the status line.
Press [SYS] > {More} > {Option} > {Show Option} to view
the installed options.
NOTE
The trace will halt in external trigger mode till the trigger thresh-
old is met or the free run function is activated.