Ext input – Agilent Technologies N9340A User Manual

Page 36

System Setting

N9340A User’s Guide

Ext Input

Toggles the channel for external input between

Ref

and

Trig. Ref refers to a 10 MHz reference signal,

and

Trig refers to a TTL signal.

Key Access:

[SYS] > {Setting} > {Ext Input}

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} > {Ext Input} > {Ref}

enable

the external reference signal input.

Then the analyzer will turn off its internal
reference.

External Trigger (Trig)

When use an external TTL signal for triggering
function, the analyzer will use the inner reference
as default.

Use the external trigger function as follows:

1 Press [SYS] > {Setting} > {Ext Input} > {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

threshold of the trigger condition at the raised
edge (

Ext Rise) or the fallen edge (Ext Fall).

NOTE

The external Ref

and

Trig

functions are not available at the

same time.

NOTE

The trace will halt in external trigger mode till the trigger

threshold is met or the free run function is activated.