Gpib Settings Menu - Ametek 7280 Instruction Manual

Chapter 5, FRONT PANEL OPERATION

5.3.16 GPIB Settings Menu

5-30
implement or respond to them, except of course the command that changes the
instrument to be addressed.
ECHO
This control, when switched on, causes the model 7280 to echo each character
received over the RS232 interface back to the controlling computer. The computer
should wait until the echoed character is returned before it sends the next character.
When switched off, character echo is suppressed.
NOTE: Character echo should always be switched on, except when controlling the
instrument manually from a simple RS232 terminal where the maximum speed
with which characters can be sent to the instrument is limited by the speed of
human typing.
PROMPT
This control has two settings, as follows:-
ON
A prompt character is generated by the model 7280 after each command response
to indicate that the instrument is ready for a new command. The prompt character
is either a "*" or a "?" If a "?" is generated, it indicates that an overload, reference
unlock, parameter error or command error has occurred.
OFF
No prompt character is generated.
DELIMITER
The character shown is that sent by the lock-in amplifier to separate two numeric
values in a two-value response, such as that generated by the MP command. The
corresponding ASCII value of this character is also shown in brackets. For example,
value 44 corresponds to a "," (comma).
PARITY
This control sets the parity check polarity when the Data Bits control specifies that a
parity bit should be used. It should be set to match the setting of the controlling
computer.
Pressing the Previous Menu key returns control to the Configuration Menu, and
pressing the Communications Monitor key accesses the Communications Monitor
display.
When the Configuration menu is displayed, pressing a key adjacent to the GPIB
Settings item accesses the GPIB Settings menu, which is shown in figure 5-20.