DATA PRECISION 5740 - Events Totalizing Block Diagram

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Model 5740 COUNTER
INPUT
SIGNAL
CONOIT
MODE
GATE
T
COUNT
GATE
S-F -♦ 4
10
1
MHZ
MHZ
MODE
GATE
S3
RESET \/j~-
SEC/EVENTS
HOLD
PROGRAM.
DIVIDER
INTERCYCLE
CONTROL
Fig. 3-3. Model 5740 SECONDS Measurement (STOPWATCH) Simplified Block Diagram
INPUT
SIGNAL
CONDIT
h
MODE
GATE
10 h
MHZ
MHZ
^
r
MODE I
^ GATE I
COUNT
GATE
GATE I 1
RESET
SEC/EVENTS
HOLD
PROGRAM.
DIVIDER
I
r
INTERCYCLE
CONTROL r
I I
I
i l J l
Fig. 3-4. Model 5740 EVENTS Totalizing Simplified Block Diagram
increases at the 100/sec rate from its
previous value. Or the value can be re
set to zero at any time by positioning the
Rotary Switch to RESET position.
3.2.4 Totalizing EVENTS
As shown in Figure 3-4, when slide
switch S4 is placed in the SECONDS/EVENTS
position and rotary switch S3 is in any of
the three manual positions, the input
pulse train of events is gated to the Pro
grammable Divider, which, in turn, is set
up to divide by 1, thereby providing a
pulse output for every event pulse input.
As in STOPWATCH Operation, the COUNTER
output is continuously transferred by the
latching register and thence to the Dis
play.
The rotary switch is operated manually
in the same way as in the SECONDS Mode,
enabling the Counter Gate when in the SEC/
EVENTS position, holding the total count
when in HOLD, resuming the totalizing
count when returned to the SEC/EVENTS po
sition, and resetting to zero at the RESET
position.
3.3 GATING CONTROLS
As described in the previous paragraphs,
the functions of the Model 5740 instrument
are accomplished by internally programming
the Counter and Divider according to the
function selected by the combined settings
of slide switch S4 and rotary switch S3.
COPYRIGHT 1975 DATA PRECISiON CORPORATION. PRINTED IN THE U.S.A.
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