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Model 5308A
Operation
3
3
2
È.
9H-3-4
FUNCTION.
Eight
position
switch
selects
mode of operation, as follows (blue lettering
matches
corresponding
blue
lettering
on
TIME BASE switch):
a.
FREQ
A.
Enables
frequency
measure-
ments of 0 to 75 MHz to be made using
Channel A.
FREQ A/B.
Enables the frequency ratio
of Channel A signals to Channel B signals
to be taken. The ratio of Channel A input
signals (from 0 to 75 MHz) to the Chan-
nel B input signals (0 to 5 MHz) can be
measured.
The ratio
is averaged
over
N cycles of the Channel
B signal. N is
selectable
from
1 to 108 by the TIME
BASE
switch.
Accuracy
is +1 count
of
frequency
A,
+
trigger
error
of
Fre-
quency B.
TIME AVG A-B
Sets counter to measure
average time interval, A to B. Channel A
starts the interval and Channel
B stops
the
interval.
The
TIME
BASE
switch
(blue lettering)
sets the number
of time
intervals
to be averaged.
Time
interval
input range is 1 ns to 10 s; there must be
a 200 ns deadtime between intervals.
d.
TIME A—B. Sets counter to measure time
interval A to B. Channel A starts the mea-
surement and Channel B stops the mea-
surement.
Time
interval
input range
is
200ns
to
10%s
(25ns
minimum
pulse
width).
The
TIME
BASE
switch
(black
lettering)
selects
resolution
of
100ns
to 10 s.
PER
AVG
B. Enables
multiple
period
averages to be made from Channel B with
frequencies of 0 to 5 MHz (range of 200 ns
to 10 s). Use TIME
BASE
switch (blue
lettering) to select number
of periods to
be averaged (1 to 108).
PER
B. Enables
single period measure-
ments to be made from Channel B with
frequencies
of 0 to 5 MHz.
The TIME
BASE
switch
(black
lettering)
selects
resolution of 100 ns to 10s.
TOT
A, LI B.
Totalizes
signals
on
Channel A during pulses on Channel B.
(Refer
to paragraph
9H-3-33.)
Totalizes
signals up to 75 MHz with TIME
BASE
switch in position 1 (blue lettering), up to
5 MHz
with TIME BASE switch in any
other position (10N),
Figure 9H-3-2.
Front Panel Controls and Connectors
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