AWG G3 PAD FOR PS3 Dokumentacja Pobierz pdf (Strona 255)

Synchronization 7 Analog Modules

System Reference, January 2001

255

The following describes the details of how to remove the

synchronization uncertainty when using same master

clock for a trigger source and an analog module.

You can do either of the following to remove uncertainty

that occurs in the trigger-to-signal delay of the analog

module.

NOTE You can add the specified delay time value to the trigger-

to-signal delay for each analog module. It is useful to

adjust the edge location of the trigger signal to the desired

position.

• Program the edge location of the trigger signal at the

beginning of the tester period and inform the system of

the trigger line length on the DUT board by using the

TRGL firmware command.

Every beginning of the tester period fully synchronizes

with the master clock. At the analog module, the phase

information between the master clock edge and the

trigger edge is obtained by treating the beginning of the

tester period as the reference point. The TRGL

command calculates the difference of the trigger line

length at the timing calibration and your trigger line

length on the DUT board, then compensates the phase

between the master clock edge and trigger edge, by

treating the beginning of the tester period as the refer-

ence point. Therefore, you have to program the edge

location of the trigger signal at the beginning of the

tester period. The following is the timing chart.

NOTE You need to specify the trigger line length with ±200 ps

(typical) accuracy in the TRGL firmware command to

remove the uncertainty.

1 2 ... 250 251 252 253 254 255 256 257 258 259 260 ... 284 285

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AWG G3 PAD FOR PS3 Dokumentacja Strona 255