SOUR:PULS:COUN sets the number of Pacer cycles. Specify from 1 to 8388607 cycles or specify INF for a continuous output.

SOUR:PULS:PER sets the period of each Pacer cycle. You can specify periods from 500ns to 8.3 seconds.

TRIG:SOUR sets the trigger source. The Pacer signal is output whenever the trigger event occurs (specified by the TRIG:SOUR command) and the INIT:IMM command has been executed.

Example: Pacing an External Scanner This example paces an external scanner connected to the mainframe’s Pacer Out port. Each negative-going transition of the square wave advances to the next channel in the scanner’s channel list. In this example, the Pacer outputs 10 periods of 1 second each.

ABORT

Set Pacer trigger system to Idle

 

State

SOUR:PULS:COUN 10

Configure Pacer for 10 cycles

SOUR:PULS:PER 1

Square wave period = 1 second

TRIG:SOUR IMM

Trigger Pacer (when INIT is

 

executed)

INIT:IMM

Place Pacer in Wait for Trigger

 

State

Example: Continuous Pacer Out Signal This example generates a continuous signal with a period of 250ms. The signal will begin when the trigger event (EXT) occurs (a negative-going transition on the mainframe’s Event In connector).

ABORT

Set Pacer trigger system to Idle

 

State

SOUR:PULS:COUN INF

Configure Pacer for continuous

 

output

SOUR:PULS:PER 250E-3

Square wave period = 250

 

milliseconds

TRIG:SOUR EXT

Trigger Pacer on external signal

INIT:IMM

Place Pacer in Wait for Trigger

 

State

Pacer Trigger States Figure 4-2 shows that the Pacer’s trigger system has an Idle State, a Wait for Trigger State, and a Pacer Action State. When you apply power, reset the system, or execute the ABORT command, the trigger system goes to the Idle State. You can configure the Pacer (SOURce subsystem) and specify the trigger source (TRIG:SOUR command) while in the Idle State. Executing the INIT:IMM command places the Pacer in the Wait for Trigger State. Now when the trigger event occurs, the Pacer will move to the Pacer Action State and begin outputting the specified number of square wave cycles. Once the Pacer has begun outputting, the trigger system returns to the Idle State.

4-2 Using the Mainframe

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Agilent Technologies E1301B, E1300B, 75000 SERIES B user manual Abort, Sourpulscoun INF, Sourpulsper 250E-3, Trigsour EXT