HP E1429A manual Setting the Arm Count, Setting the Arm Delay

Setting the Arm Count

The registers used to set the arm count are listed below.

∙Arm count registers

base + 5516 and base + 5716

Procedure

Setting the Arm Delay

1.Load the arm count registers.

A. With the digitizer in the idle state, write the decimal equivalent of the most significant byte to register 55. Writing the decimal equivalent of the least significant byte to register 57. You can set the arm count from 1 to 65,535 arms. For example, to program an arm count of 20:

MSB	LSB
0 0 0 0 0 0 0 0	0 0 0 1 0 1 0 0
0	2010

0 is written to register 55

2010 is written to register 57

To program an arm count of 300:

MSB	LSB
0 0 0 0 0 0 0 1	0 0 1 0 1 1 0 0
110	4410

110 is written to register 55

4410 is written to register 57

The arm delay is the amount of additional delay to occur from when the digitizer accepts the arm signal, to when it enters the wait-for-trigger state. There is always a delay of one reference clock cycle. The registers used to set the arm delay are listed below.

∙Arm Control register base + 4B16

∙Arm Delay registers

base + 5116 and base + 5316

374 Register Programming Appendix C