
3 FUNCTIONAL DESCRIPTION
Time Sampling
Tag registers
Clock
generation
Time
Tag
Sampl.
registers
Clock
generation
5 1
Trigger
4 x Word
Trigger
4 x Word
Trigger
Output
Recognizers
Sequencer
- - >
Recognizers
Sequencer
Cross
Trigger
--->
Trace Buffer
(128x32K)
Statistics
counters
(Trace Buffer
(64x321()
Statistics
counters
In this chapter you will find a description of the main blocks of the VBT - 325.
The function of each block is described, and the signal path is shown.
Main blocks
The VBT-325 contains two separate independent analyzers, one 128-bit wide
analyzer pre-configured for the VMEbus, and one 64-bit wide analyzer that can
be configured either for VSB, SCSI or other busses on the P2 connector of
VME boards. Both analyzers on the board have individual sampling logic, word
recognizers, trace memories and triggering circuitry.
Each analyzer part of the VBT-325 consists of three main stages, through
which samples are passing during the acquisition process:
• Sampling stage
• W o r d Recognition / Triggering stage
• S a m p l e Storage / Statistics Counting stage
Ext.
inputs
4
VMEbus
P2 rows a/c
VSB SCSI Ust
Clock sel. b d d
jumpers
Terminal<--->
Host /
Printer 4 - - >
Figure I I . VBT-325 Block Diagram (shown in "Twin mode")
VMETRO
VBT-325 User's Manual
23
Содержание VBAT-PB
Страница 15: ...x i v 1 1 I 1 1 I I i i I I 1 I I 1 I 1 I I ...
Страница 23: ...1VBT 325 Product overview 8 V B T 3 2 5 User s Manual V M E T R O ...
Страница 125: ...8 Trace examples 110 V B T 3 2 5 User s Manual V M E T R O ...
Страница 144: ...9 VBAT PB VME bus anomaly trigger ITP40 I GND VMETRO V B T 3 2 5 User s Manual 1 2 9 ...
Страница 159: ...1 1Jumper settings 144 V B T 3 2 5 User s Manual V M E T R O ...
Страница 181: ...16 Simulator for PC 166 V B T 3 2 5 User s Manual V M E T R O ...