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How to Measure Fast
Speed Summary 7-15
Timesaving Com
-
mands
Time Gain in ms Sacrifice
PM6680B PM6681 PM6685
Freq Freq Freq
FREQ:RANG:LOW8MAX
(23) (23)
10kHz lower freq. limit for AUTO. This
Timesaving is only possible when
AUTO is on.
(55)
50kHz lower freq. limit for AUTO. This
Timesaving is only possible when
AUTO is on.
INP:LEV:AUTO8OFF
40 70 52
You have to set trigger levels manually.
DISP:ENAB8OFF
5.4 3.5 7.7
Only the controller can read the result.
CAL:INT:AUTO8OFF
0.22 N.A. 0.22
You must instruct the counter to cali
-
brate the interpolators once in a while
to maintain accuracy.
SENS:ACQ:RES8LOW
0.81 0 / 0.1 0.81
Works up to about 40kHz. The resolu-
tion of each measurement drops to
100ns for PM6680B/85 and 80ns for
PM6681
(PM6681 Only: Gives Back-to-back
measurements in period, i.e. every pe-
riod in a block is measured)
TRIG:COUNT82100
0.69 N.A. 0.69
No sacrifice, the program loop in the
counter gets shorter, saving time.
TRIG:COUNT86143
N.A. 4.2 N.A.
INT:FORM8PACK
1.15 1.2 1.15
You cannot use limit monitoring, math
-
ematics etc. in the CALC subsystem,
nor the Display or the Output subsys
-
tems.
TRIG:COUNT81000(o
r more)
STAT:OPER:ENAB80
ARM:STA:LAY2:SOUR
8 IMM
INP:LEV:AUTO8OFF
(All together)
N.A. 0.13 N.A.
These commands (all together) will in
-
crease measurement speed the last
step from about 4000 to over 8000
measurements/s
FORM:TINF8OFF
N.A. 0 N.A.
No timestamping possible. This only
influences the read. Time stamps are
always registred internally.
+
All these time gain estimates are approximations valid for frequency A mea
-
surements and may be changed without notice. The time gain/loss depends on
measuring function.