The HEX and UNSIGNED FIXED are fixed size formats, whereas
UNSIGNED SHORT is a variable size format. Therefore, it requires commas
to separate the values.
Examples:
HEX format: #L000A0102030405060708090A
UNSIGNED FIXED: #L...I0..I..2..3..4..5..6..7..8..9.10
UNSIGNED SHORT: #L,I0,I,293,4,5,6,7,8,9,10
Each dot repre-
sents a space
character
Note:
The conversion type and the size must be fixed before reading
writing data.
Data transfers via RS-232-C can only be made in ASCII formats.
AND
If the host computer allows only small amounts of data to be sent or
read, the transfer may be partitioned into several blocks of the
selected format. The maximum length of each block is determined by the
COMM BLOCKSIZE command. The length includes all bytes or characters of
the -block as well as characters which may compose the <TRAILER> and
<END>.
The transfer will be structured as follows:
i
st
Block -- <TRAILER><END> -- 2
nd
Block -- <TRAILER><END> -- ....
.... -- Last Block -- <TRAILER><END> -- END block -- <TRAILER><END>
Where the END block is:
#I
When reading data from the 9400A, the exact form of
determined by the command COMM TRAILER. <END> is:
the TRAILER is
<END> = <CR> when using RS-232-C (unless modified with the command
RS_CONF).
= EOI ACCOMPANYING the last character of TRAILER, when in GPIB.
If the 9400A receives another command message, terminated with <END>,
while sending data, the transfer is aborted and status byte 6 (ERROR)
is set to the value I.
Data may be lost if the readout sequence is interrupted with a Serial
Poll or by the untalk command.
Remote Operations
7-10
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