Tektronix DC 5010 Anleitung Seite 27

Table 1-1 (cont)
Characteristics Performance Requirements Supplemental Information
L
In the AUTO mode the counter measures with a fixed measurement time of about 300 msec (or the time for one event,
whichever is greater).
N
=S
Freq A (Hz)
LSD:
FREQ
PER
RATIO
TIME A-*B
& RISEIFALL
WIDTH A,
EVENTS
6
DUR A
x
.3 seconds (N always > I )
(Freq A)2
10 nsec
3.1 25 nsec for N ~ 1 0 ,
- - - -
N
for N >10
Freq A
Freq B
x
N
10 nsec
3.125 nsec for N ~ 1 0 ,
--_
for N >10
10 nsec
3.125 nsecfor N ~ 1 0 , - for N >10
JN
Period B
x
Events B dur A
Width A
x
N
Time Base Efrror: The sum of all the errors specified for the time base used.
-
-
aOver voltage protection still functions, but in riselfall, (50 51 and X5) it may not always protect the 25 51 series input resistor.
bWith
109
Averages selected, LSD can be as small as 31.25 attosec.
=Can be set to 0.0 ns by use of "NULL" function.
dCan be removed by use of "NULL".
eThe B channel will not count events until after the first valid A channel count.
REV JUL 1983