Tektronix DG2020A, Руководство пользователя

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Operating Basics
2Ć16
DG2020A, P3410, & P3420 User Manual
Operating Modes Overview
In the run modes, pattern output is controlled by the pattern generation unit’s
pattern control circuit. The DG2020A supports four run modes: repeat, single,
step, and enhanced. These run modes are specified with the SETUP Run Mode
menu. Table 2-3 provides functional information for each mode.
Table 2Ć3: Run modes
Run mode Function
Repeat ! ! !! ! ! ! ! ! ! !&
" !! ! "!"! ! !! "
Single "!"! ! !! ! ! ! ! ! ! !
" "!"! ! !! !
!! "
Step ! !& ! ! %! !! " ! !
"!"! ! ! "!!
Enhanced ! $! ! ! !! #! " ! $!
!#
The three modes other than enhanced mode ignore the event jump and trigger
wait settings.
When pattern data or sequence data is created or edited, or the output pod bit
allocations are changed, the pattern that is actually output will not be updated
unless these new settings are transferred to the pattern generation unit. For doing
this, the DG2020A supports two methods: auto and manual. These are called the
update modes, and are set up with the Update item in the SETUP Run Mode
menu. Table 2-4 provides functional information for both modes.
Table 2Ć4: Update modes
Update mode Function
Auto ! ! $ !& !
Manual ! ! $ $ & ! "
. Although the output will be updated reliably in auto mode, the response to
edit operations may be slow when there is a large amount of data. In such cases,
it is more efficient to perform a number of edit operations, and then update the
output data in a single operation in manual mode.
Run Modes
Update Modes