8508A
Users Manual
INT / EXT
This selects the connection of the multimeter's guarding. (For backwards compatibility
LCL & REM can also be used.)
For scan operations, the guard selection is applied to the channel currently being applied
to the A-D converter.
Power On and Reset Conditions
INT (internal)
Measurement Gate Width
This command selects the gate width for frequency readings during AC measurements.
FAST_ON
Selects a gate width of 50ms, and a frequency resolution of 4.5 digits.
FAST_OFF
Selects a gate width of 1s, and a frequency resolution of 6.5 digits.
Both selections are mutually exclusive.
The use of the longer gate width results in a 6.5 digit frequency measurement. The
frequency gate is triggered at the same point as the A-D conversion which could be
significantly shorter than 1 second. This may reduce the read-rate, as the measurement
processing cannot begin until both the frequency gate and the A-D conversion are
complete.
Power On and Reset Conditions
FAST_ON.
Maximum, Minimum and Peak-Peak
Recall Stored Values
MAX?
Recalls the stored value of the maximum signal value to be measured since the most
recent general reset, store reset or function change.
MIN?
Recalls the stored value representing the minimum signal value to be measured since the
most-recent general reset, store reset or function change.
4-22
GA TE
phs
Measurement Gate Width
MA X?
MIN?
PKPK?
Recall Stored values
FA ST_ON
FA ST_OFF
adj220f.eps
adj221f.eps