HP E1432A User's Guide

The C-Language Host Interface Library

Managing Multiple-mainframe Measurements

In a single mainframe measurement, the HP E1432A communicates with other HP E1432As through the TTLTRG lines. However, when using the VXI-MXI bus extender modules, the TTLTRG lines, which carry the group synchronization pulse and sample clock, are extended only in one direction. This unidirectional signal connection restricts the types of measurements you can make in a multiple mainframe environment.

You cannot perform the following types of multiple mainframe measurements:

￿Unequal pre-trigger delay settings between mainframes

￿Channel triggering by channels in Mainframe B

￿Lower spans or longer blocksizes in Mainframe B

￿Different digital filter settling times between HP E1432A modules

Slot 0

HP E1482B

 

 

HP E1432A

Contoller

 

 

 

 

(or HP E1431A)

 

 

 

 

 

Fail Acs Trigger Fail

Acs Trigger

 

 

ExSamp Cal ExTrig ExSamp Cal ExTrig

 

 

16 CHANNEL

16 CHANNEL

 

 

51.2 kSa/s

51.2 kSa/s

 

 

Digitizer+DSP

Digitizer+DSP

 

 

Chan

 

Chan

 

 

1-4

 

1-4

 

 

Chan

 

Chan

 

 

5-8

 

5-8

 

 

Chan

 

Chan

 

 

9-12

 

9-12

 

 

Chan

 

Chan

 

 

13-16

13-16

 

 

HP E1432A

HP E1432A

VXI Mainframe A

Fail Acs Trigger

Fail Acs Trigger

 

ExSamp Cal ExTrig ExSamp Cal ExTrig

 

16 CHANNEL

16 CHANNEL

 

51.2 kSa/s

51.2 kSa/s

 

Digitizer+DSP

Digitizer+DSP

 

Chan

Chan

 

1-4

1-4

 

Chan

Chan

 

5-8

5-8

 

Chan

Chan

 

9-12

9-12

 

Chan

Chan

 

13-16

13-16

 

HP E1432A

HP E1432A

VXI Mainframe B

HP E1482B

HP E1432A

(or HP E1431A)

 

Figure 4-1: Multiple mainframes - two mainframes

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