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525B
Users Manual
4-20
IEEE-488 Interface The Calibrator sends the ASCII character Carriage Return
with the EOI control line held high as the terminator for response messages. The
calibrator recognizes the following as terminators when encountered in incoming
data:
• ASCII CR character
• Any ASCII character sent with the EOI control line asserted
RS-232 Interface The Calibrator returns a Carriage Return (CR) character with
each response. The calibrator recognizes the following as terminators when
encountered in incoming data:
• ASCII CR character
• ASCII LF character
Incoming Character Processing
The Calibrator processes all incoming data as follows (except Binary Block Data
as described under Parameter Syntax Rules):
1. The most significant data bit (DIO8) is ignored.
2. All data is taken as 7-bit ASCII.
3. Lower-case or upper-case characters are accepted.
4. ASCII characters whose decimal equivalent is less than 32 (Space) are
discarded, except for characters 10 (LF) and 13 (CR).
Response Message Syntax
In the command descriptions in Chapter 5, responses from the Calibrator are
described wherever appropriate. In order to know what type of data to read in,
refer to the first part of the entry under "Response" in the tables. The response is
identified as one of the data types in Table 4-10.
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