HP 4278A - Page 95

ERR? SOFTKEY LABEL: NOT ASSIGNED
The ERR? command returns the error message number.
SYNTAX:
CERR? )>I
IMPORTANT POINTS:
When the error does not occur, 0 (zero) is returned.
EXAMPLE: (Returns and displays the error number.)
10 OUTPUT 717;"ERR?"! Return the error number
20 ENTER 717;A I Read the error number
30 DISP A ! Display the error number
40 END
FREQ SOFTKEY LABEL: lkHz/1MHz (in 'SIGNAL SOURCE')
The FRED command is used to set the test frequency.
SYNTAX:
PARAMETER:
The control parameter choices are:
Control
Parameter
Description
1
2
Set the test frequency to lkHz.
Set the test frequency to 1MHz.
The default setting is FREQ1.
EXAMPLE:
OUTPUT 717;''FREQ21 Set the test frequency to 1 MHz