Boonton 1121A, Instruction Manual

Page: 45 / 181

Operation Section 3
3-23
b. ASCII characters having hexadecimal values of 0
to 23 and 26 to 2B are ignored. The ASCII ($) and (&),
hexadecimal 24 and 25, are reserved. Lower case letters
are automatically changed to upper case.
c. A primary function mnemonic sent without a fol-
lowing argument will make the specified function active.
d. The data string may not exceed 150 characters
and may be terminated with LF, CR, and/or EOI.
e. Interpretation of the data string does not begin until
termination occurs.
f. If units are unspecified for any argument, default
units are automatically appended. The functions SPCL
and PRGM always use default units.
g. If a unit mnemonic is sent without a
corresponding argument, the display will reflect the
change provided that the units are appropriate for the
active function and the display can accommodate the
rescaled number.
3-99. Data String Errors.
Errors are detected during
interpretation. The occurrence of an error will display the
error code if the display is enabled, and will set SRQ true,
if enabled. The error and SRQ can be cleared by a serial
poll, a status request (TS), or a clear error instruction
(CL). All errors cause previous valid parameters to be
restored. No new input can be processed until an existing
error is cleared.
3-100. Data String Examples. The following are ex-
amples of typical programming strings in HP BASIC:
OUTPUT 715; “SP16SF1234.56HZ”
OUTPUT 715; “Z1FSSL2VO”
OUTPUT 715; “PG1RE”
OUTPUT 715; “RADB”
3-101. Store and Recall Operation.
Store and Recall
operation may be used to advantage with a bus controller.
The instrument provides either temporary or long-term
storage for control strings. This can be used to minimize
bus traffic by storing several control setups at initialization
and recalling them when needed with a simple string
statements, such as:
OUTPUT 715; “PG23RE”
Since few controllers have power fail protection, the data
in the instrument’s non-volatile memory is the more
secure.