Sending a Trigger Immediate Signal

Procedure

Aborting Measurements

2.Send the arm immediate signal.

A. Read the Abort and Arm Immediate register (base + 4116). Reading the registers sends an arm immediate signal.

A trigger immediate signal triggers the digitizer, overriding the sample/hold bit of the trigger source register.’The registers used to send a trigger immediate signal are:

Trigger Immediate register base + 5D16

Trigger Source register base + 4D16

1.Suspend sample triggers (e.g. trigger hold).

A.Set trigger source register (base + 4D16) bit 7 to ’1’ to suspend sample triggers. Be sure retain the settings of bits 6 - 0.

2.Send a trigger immediate signal.

A.Write any 8-bit value to the trigger immediate register

(base + 5D16).

3.Re-enable sample triggers.

A. Set bit 7 (base + 4D16) to ’0’ to enable sampling for the next reading (measurement) sequence. Retain the settings of bits

6 - 0.

The registers used to abort digitizer measurements are shown below. "base" is the A24 base address.

Trigger Source register base + 4D16

Abort and Arm Immediate register base + 4116

Procedure 1. Suspend sample triggers (e.g. trigger hold).

A. Set trigger source register (base + 4D16) bit 7 to ’1’ to suspend sample triggers. Be sure retain the settings of bits 6 - 0.

Appendix C

Register Programming 377

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HP E1429A manual Sending a Trigger Immediate Signal, Aborting Measurements