Lecroy WAVEACE 2022 2-channel oscilloscope, Digital Storage oscilloscope, WaveAce 2022 Manuale Utente
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WaveAce 2022
Operator's Manual
920836 Rev A
7
Block Data
These are binary data values used to transfer waveforms from the oscilloscope to the controller
using the WAVEFORM command/query.
using the WAVEFORM command/query.
Buffer size limitations apply to block data:
If data exceeding the oscilloscope’s 512 byte input buffer limited is received, the excess is
discarded until a terminator (delimiter) is detected.
discarded until a terminator (delimiter) is detected.
If data exceeding the output queue is transmitted, commands that are not interpreted and excess
data are discarded.
data are discarded.
Terminator/Delimiter
The oscilloscope does not decode an incoming program message before receiving its terminator
unless the message is longer than the 512 byte input buffer, at which point the oscilloscope
starts analyzing the message once the buffer is full.
unless the message is longer than the 512 byte input buffer, at which point the oscilloscope
starts analyzing the message once the buffer is full.
Terminators vary by interface:
State
TCP/IP
USB
Recv
EOI
CR
Send
LF+EOI
LF+CR
Response Messages
The oscilloscope sends a response message to the controller in answer to a query. The format
of response messages is the same as that of program messages: commands separated by semi-
colons and ending in terminators. Suffix units are also expressed in the response. These
messages can be sent back to the oscilloscope in the form in which they were received to be
accepted as valid commands.
of response messages is the same as that of program messages: commands separated by semi-
colons and ending in terminators. Suffix units are also expressed in the response. These
messages can be sent back to the oscilloscope in the form in which they were received to be
accepted as valid commands.
For example, if the controller sends the message:
TIME_DIV?;TR_MODE NORM;C1:COUPLING?
The oscilloscope might respond with:
TIME_DIV 50 NS;C1:COUPLING D50
Note the response message refers only to the two queries that were sent in the original
message.
message.
Whenever you expect a response from the oscilloscope, add the query form of the command to
the control program following the command to specify that a read response is desired. If the
controller sends another command without reading the response to the previous one, the
response message in the output buffer of the oscilloscope will be discarded.
the control program following the command to specify that a read response is desired. If the
controller sends another command without reading the response to the previous one, the
response message in the output buffer of the oscilloscope will be discarded.