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8842A
Instruction Manual
3-22
DEVICE-DEPENDENT MESSAGES
Single-character Commands
Bn Cn Dn Fn Gn Pn Rn Sn Wn Xn Yn Zn Each of these commands requires the single
numeric digit (n).
Numeric-entry Characters
NE. + - 0123456789 These characters are used for entering numbers
Terminators
CR Carriage Return
LF Line Feed
GET Group Execute Trigger
EOI End Or Idenity (used as END/DAB)
INTERFACE MESSAGES
Address Messages
MLA My Listen Address
MTA My Talk address
UNL Unlisten
UNT Untalk
Universal Commands
ATN Attention
DCL Device Clear
IFC Interface Clear
LLO Local Lockout
REN Remote Enable
SPD Serial Poll Disable
SPE Serial Poll Enable
Addressed Commands
GET Group Execute Trigger
GTL Go to Local
SDC Selected Device Clear
Ignored Characters
, comma These characters may be inserted anywhere in a
character string without affecting the string.
Space Character string without affecting the string.
All Other ASCII non-printing characters (except CR
and LF)
They carry no special meaning and are ignored by
the 8842A. They are not placed in the input buffer.
ERROR-PRODUCING CHARACTERS
! “ # $ ‘ ( ) / : < = > ; @ [ / ] ~
HIJKLMOQUV
The error annunciator is displayed on the 8842A
front panel when one of these characters is
encountered (ERROR 71).
Figure 3-7. Interpretation of Messages