VXI VT1433B manual Managing Multiple-mainframeMeasurements

Models: VT1433B

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Managing Multiple-mainframe Measurements

VT1433B User's Guide

Using the VT1433B

Managing Multiple-mainframe Measurements

In a single-mainframe measurement, the VT1433B communicates with other VT1433Bs 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 that can be made in a multiple mainframe environment.

The following types of multiple mainframe measurements cannot be performed:

￿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 VT1433B modules

Ethernet or Firewire

 

 

 

 

Embedded Controller

 

 

 

VT1433B

 

VT1433B

VT1433B

 

Fail Acs

Trigger Fail Acs

Trigger

 

ExSamp Cal

ExTrig ExSamp Cal

ExTrig

 

8-CHANNEL 196

8-CHANNEL 196

 

kSa/s DIGITIZER kSa/s DIGITIZER

 

+DSP

 

+DSP

 

S

 

 

 

 

l

Chan

 

Chan

 

o

5 - 8

 

5 - 8

 

 

 

 

 

t

 

 

 

 

0

 

Chan

 

Chan

 

 

1 - 4

 

1 - 4

VXI Mainframe A

MXI-2

Extender

Interface

VT1433B

VT1433B

Fail Acs

Trigger

Fail Acs

Trigger

ExSamp Cal

ExTrig

ExSamp Cal

ExTrig

8-CHANNEL 196

8-CHANNEL 196

kSa/s DIGITIZER

kSa/s DIGITIZER

+DSP

 

+DSP

 

MXI-2

 

 

VT1433B

Extender Interface

 

 

 

VT1433B

VT1433B

Fail Acs

Trigger Fail Acs

Trigger

ExSamp Cal

ExTrig ExSamp Cal

ExTrig

8-CHANNEL 196

8-CHANNEL 196

kSa/s DIGITIZER kSa/s DIGITIZER

+DSP

 

+DSP

 

Chan

 

Chan

 

5 - 8

 

5 - 8

 

 

Chan

 

Chan

 

1 - 4

 

1 - 4

VXI Mainframe A

VT1433B

VT1433B

Fail Acs

Trigger

Fail Acs

Trigger

ExSamp Cal

ExTrig

ExSamp Cal

ExTrig

8-CHANNEL 196

8-CHANNEL 196

kSa/s DIGITIZER

kSa/s DIGITIZER

+DSP

 

+DSP

 

Chan

Chan

5 - 8

5 - 8

Chan

Chan

5 - 8

5 - 8

Chan

Chan

1 - 4

1 - 4

Chan

Chan

1 - 4

1 - 4

VXI Mainframe B

VXI Mainframe B

MXI-2 Extender Interface

VT1433B

MXI-2 Extender Interface

VT1433B

Example 1: Slot 0 Controller

Example 2: MXI-2 Daisy Chain

Figure 3-3: Multiple mainframes - two mainframes

3-11

Page 49
Image 49
VXI VT1433B manual Managing Multiple-mainframeMeasurements