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8.2 Communication
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Data Format
① Inquiry without read value
String of not more than 64 ASCII characters.
② Measurement data
There are 2 ways measurement data is formatted.
Default data uses Format 1.
FORMAT1
(-)D.DDDDDDDDESDD + delimiter
( ) are used only when there is a negative value. Left-justify the entire
line when the value is positive.
D: Digit
E: Exponential
S: +/- signs
FORMAT2 (Software version 2.05 or later)
The "FORMat" command is used to make the setting.
The settings are in effect until the power is turned off.
Format 1 will be the active method upon restarting or resetting the
instrument.
For more information, please refer to APPENDIX (6) "Using FORMAT2
on Measurement Data."
③ Over flow
Positive: 9.900000E+37
Negative: -9.900000E+37
④ ON/OFF for header
Header can be set ON or OFF for some of the responses.
The HEADer command is used to make the setting.
Examples of responses with the header ON and OFF are given below.
Example: Response when the trigger delay is set to 0.5 s.
Inquiry: "TRIGer:DELay?" (Command to inquire about delay time).
Response: (Trigger delay is 500 ms)
When the header is ON (Command part + parameter part)
":TRIGGER:DELAY 5.000000E-01"
When the header is OFF (Parameter part only)
"5.000000E-01"
Output Queue
Response messages accumulated in the output queue and are transmitted as
data and cleared. The output queue is also cleared when the power is turned
off and turned on again. The 3237/38/39 has an output queue of 64 bytes
capacity. If the response messages overflow this limit of 64 bytes, a query
error is generated, and the output queue is cleared.
Input Buffer
The 3237/38/39 has an input buffer of 64 bytes capacity. When more than
64 bytes of data are transmitted, when the buffer is full any subsequent bytes
received will be ignored.
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