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Operating Instructions-DC 501
0
COMMANDS
/---
The instrument is controlled by the front panel or via com-
Each command begins with a header-a
word that de-
mands received from the controller. These commands are of
scribes the function implemented. Many comrnands require
three types:
an argument following the header, a word or tiumber which
specifies the desired state for the function.
Setting commands-control instrument settings.
Query-output commands-ask
for data.
Operational commands-cause
a particular action.
Using fewer characters than the abbreviated header
or argument should be done with caution since erro-
The instrument responds to and executes all commands
neous results or damage could result if this data is
when in the remote state. When in the local state, setting
sent to the wrong instrument.
and operational commands generate errors since instru-
ment functions are under front panel control; only query-
output commands are executed.
FUNCTIONAL
INSTRUMENT C O M M A N D S
Function Commands
EVE BA
FALL A
FREQ A
FUNC?
PER A
PROB A&B
RAT B/A
RISE A
TEST
TIME AB
TMAN
TOT A
TOT A+B
TOT A-B
WID A
-
Counts Channel B during Channel A
pulse width
-
Measures the falltime of the signal on
Channel A
-
Measures frequency of input signal on
Channel A
-
Query
returns current
instrument
function
-
Measures period of Channel A signal
-
Enables probe compensation
-
Measures ratio of B events to A events
-
Measures the risetime of the signal on
Channel A
-
Tests ROM, 110, accumulator
-
Measures time from A event to B event
-
Manual timing function (stop watch)
-
Totalizes Channel A events
-
Measures the total number of events
on Channel A plus the total of events
on Channel B
-
Measures the total number of events
on Channel A minus the total number
of events on Channel B
-
Measures pulse width of Channel A
signal
COMMAND LIST
Measurement Control
AVE or AVGS
AVE? or
AVGS?
NULL ON
NULL OFF
NULL ?
RDY?
RES
START
STOP
Sets
number
of
measurements
averaged (in decades only), or auto
-
averaging
Query returns AVE cnunn>; (- 1 for
AUTO Averages)
Subtracts
present
rneasurement
results from all succeeding measure-
ments
Resets Null value
Query returns NULL ON cr NULL OFF
Query returns RDY 1 for new data
ready or RDY
0
for new data not ready
Resets counters, restarts current
measurement
Starts TMANual, STOPped, or TOTal-
ize measurement
Stops any measurement except TEST
or PROBECOMP
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