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7.3 GPIB ADDRESS
The GPIB address of the amplifier is set by via the Front panel using the Control knob at the start up
menu.
NOTES ON USING NATIONAL INSTRUMENTS' GPIB CONTROLLERS:
In order for the amplifier to operate correctly with a National Instruments GPIB controller card, the
following must be done: (Items 1-5 are done in the IBCONF program.)
1. Set "Terminate reads on
EOS
" to
yes
.
2. Set
"Set
EOI
with
EOS
on Writes" to
yes
.
3. Set
the
EOS
byte to
0Ah
(an ASCII line feed character).
4. Set
"Send
EOI
at end of writes" to
yes
.
5. Set
"Enable
repeat addressing
" to
yes
at the board level.
6. When sending command strings to the amplifier, a carriage return character (
0Dh
) followed by a
line feed character (
0Ah
), must always be appended to the command, otherwise the amplifier will
wait indefinitely for the
CR-LF
combination. If this happens the unit will have to be powered off
and back on to reset this condition. (The interface device will automatically assert the
EOI
line
during the
LF
if items 2 - 4, above, are set to yes in the IBCONF program.) As an example,
when issuing the zero attenuation command using the IBIC or WIBIC program, the command
string would look like this: "
ZA\r\n
". (The \r is National Instruments' notation for the carriage
return, and the \n is the line feed or 'new line' character.) Notice that the commands are upper
case only.
