Racal Instruments 1256 Manual page 54

Publication No. 980855 Rev. A
EADS North America Test and Services
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-----SETTINGS-----
Type: Remote
> Option: Source
Status: RS-232
4. Line 4 now indicates the remote interface source that is
active. The two choices are GPIB and RS-232. If the choice
shown is not the desired one, then rotate the knob until the
correct choice is displayed:
-----SETTINGS-----
Type: Remote
Option: Source
<Update?: GPIB
Then update to this choice by pressing the fourth key. The
display now reads:
-----SETTINGS-----
Type: Remote
Option: Source
> Status: GPIB
To set the GPIB parameters, such as the address, refer to
Chapter 4, GPIB AND RS-232 INTERFACES.
Menu preferences are not normally retained after the power is
removed from the instrument. To make (a) menu preference(s)
permanent, make the desired change(s) to settings first and
then proceed to the section Storing the Menu Preferences to
make the changes permanent. Following this procedure will
put the settings into non-volatile memory and allow them to
be restored during instrument power-up.
Local Lockout
In some applications, it may be desirable to lock out (disable) the
front-panel controls while controlling the 1256 via a remote
interface. The 1256 provides two types of local lockout:
•
Automatic lockout: When the 1256 receives any
command via the RS-232 or GPIB interface, it shows a
message on the front-panel display, stating that the unit
is in remote operation, and which interface (GPIB or
RS-232) is active. For example, after receiving a
command via the RS-232 interface, the display reads:
*REMOTE OPERATION*
(RS-232 is active)
<Local Mode
At this time, the knob and all keys are disabled, and the
1256 receives commands from the remote interface
1256 User Manual
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NOTE:
Using the Front-Panel Controls 3-19