VTI Instruments EMX-4016B, Руководство пользователя

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APPENDIX B 38
The channel name is defined as <slot no>!CH<channel no>. For example, 4!CH2 indicates the 2
nd
channel of a card installed at slot4 of a chassis. The predefined channel group names are “ALL” or
an instrument model number such as “EMX-4350”. Optionally, the user can create new custom
channel groups using
AddChannelGroup method. When more than one chassis are in the session,
the channel name of the 2
nd
chassis adds 100 to the slot number, such as 104!CH2, and 200 for the
3
rd
chassis, 300 for the 4
th
, etc.
The NumChannels property gives total number of individual input channels, while the Count
property is the total number of channel or channel group objects in an array.
S
TART
, A
RM
, T
RIGGER
,
AND
A
LARM
EMX-4250/4350/4380 implements sophisticated Arm/Trigger model as shown in Figure 4-1. This
trigger model conforms industry standard trigger models defined in the IVI Digitizer specification
or LXI Sync specification with some additional features.
Figure 4-1: Trigger Model
Sync
Sync is an event that synchronizes the entire system. The Sync interface is used to configure the
synchronization between cards. All cards are simultaneously started by the SYNC signal and then
they synchronize the state machine transition with each other through a coordination signal. The
Line and CoordinationLine properties define which PXI trigger lines to send these signals.