Theory of
Operation—
DM 5010
FUNCTION
AND
RANGE
CONTROL
<JX$>
The purpose of the Function and Range Control
circuitry
is
to
convert
a
string of
serial data from the Grounded Sec
tion (representing function and range information) into a par
allel
output
configuration for activating transistor and relay
switches.
The combination of switches activated sets the
measurement
function and
range.
Figure
4-9 is a simplified diagram of the Function and
Range Control stages, showing how the two boards inter
act,
Initially, all
rgisters are
cleared by docking
a series of 32
lows into
U1430 from
the
opto-isolators using the IRD (Iso
lated Range Data) and IRC
(Isolated
Range Clock) lines,
both of
which are under direct microprocessor control. The
low IRD
levels applied to U1530 hold the
STB (strobe) in
puts of U1430
and U1330 high, allowing
shifting to continue,
no
matter what serial data is being shifted out of U1300,
Now, all registers are clear and
are ready to be set with
any
ISOLATED
RANCE
DATA
ISOLATED
RANCE
CLOCK
2994
*17
A
Fig. 4-9. Simplified function and range control circuitry.
REV
JAN
1983
4-13
Summary of Contents for DM 5010
Page 14: ...DM 5010 2994 00 DM 5010 Programmable Digital Multimeter xii ADD JUL 1986...
Page 27: ...Operating Instructions DM 5010 2994 03 Fig 2 3 DM 5010 front panel controls and connectors 2 3...
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Page 251: ...Section 8 DM 5010 OPTIONS No options are available 8 1...
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Page 272: ...DM 5010 2994 37 Fig 10 2 Location of DM 5010 adjustments and test points...
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Page 337: ...63 REV JUN 1986...
Page 338: ...FIG 1 EXPLODED DM 5010...
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