Functionalities – ADLINK PXI-2006 User Manual

Page 75

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Operation Theory

65

EXTDTRIG and EXTWFTRIG

EXTDTRIG and EXTWFTRIG are dedicated digital trigger input
signals for A/D and D/A operations respectively. Please refer to
section 4.5 for detailed descriptions.

Category

Timing signal

Functionality

Constraints

Dedicated input

EXTTIMEBASE

Replace the

internal

TIMEBASE

1. TTL-compatible

2. 1MHz to 40MHz

3. Affects on both A/D

and D/A operations

EXTDTRIG

External digi-

tal trigger

input for A/D

operation

1. TTL-compatible

2. Minimum pulse

width = 20ns

3. Rising edge or fall-

ing edge

EXTWFTRG

External digi-

tal trigger

input for D/A

operation

1. TTL-compatible

2. Minimum pulse

width = 20ns

3. Rising edge or fall-

ing edge

Multi-function input

AFI[0]

(Dual functions)

Replace the

internal

ADCONV

1. TTL-compatible

2. Minimum pulse

width = 20ns

3. Rising–edge sensi-

tive only

Replace the

internal

SCAN_STAR

T

1. TTL-compatible

2. Minimum Pulse

width > 2/TIMEBASE

AFI[1]

Replace the

internal

DAWR

1. TTL-compatible

2. Minimum pulse

width = 20ns

3.Rising–edge sensi-

tive only

Table 4-9: Auxiliary function input signals and the corresponding functionalities

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