VT1433B User's Guide
Using the VT1433B
Data Transfer Modes
The VT1433B can be programmed to use either of two data transfer modes: overlap block mode and continuous mode. Block mode will be discussed first.
Block Mode (Agilent/HP E1431A)
The VT1433B’s overlap block mode is similar the block mode which is used in some Agilent instruments such as the Agilent/HP E1431A. In block mode, the input hardware acquires one block after getting an arm and trigger. It does not allow the system to trigger until it is ready to process the trigger and it acquires
The VT1433B’s overlap block mode can be configured to act exactly like traditional block mode. It also has additional capabilities as described below.
Continuous Mode
Both the VT1433B and the Agilent/HP E1431A use continuous mode. In this mode, the input hardware waits for an arm and trigger and then starts acquiring data continuously. If the host is slow, several blocks can be queued up in the input hardware. If the host gets far enough behind, a FIFO overflow occurs and the input stops acquiring data.
The VT1433B’s overlap block mode can be configured to act similarly to continuous mode, but not identically. The VT1433B can also use the traditional continuous mode.
Overlap Block Mode
Overlap block mode combines features of both block mode and continuous mode. The main difference between overlap block mode and traditional block mode is that overlap block mode allows additional arms and triggers to occur before an