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I
Model l l l 80A
1JiJCF:•::
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OR
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tnJ[f:·:·~lil_r----
STORAGE FLAG (FROM
OVM)
PRINTER HOLD·OFF ITO
OVM)
INPUT
CYCLE
110,20,30, 40,
0R 50TRIGGERS
AUTOMATICALLY ACCEPTED I
TIME TO
PRIN
T
>
5~1
MEASUREMENT
HOLD
UNHIBITS SAMPLING
BUT
AL LOWS
ONE
INPUT AND OUTPUT CYCLE
TO
TAKE PLACE)
l
ll lOA-
1-2'1
1
OUTPUT
CYCLE
Figure 3-6. Measurement Hold.
Measurement Hold may be used to automatically start one complete
storage and output cycle by breaking this line momentarily.
Sampling does not take place prior to or after a storage cycle
.
The
proper number of triggers equal
to
the Storage Limit are counted
automatically
.
MEASURE
UP TO
1000/s
UP TO
50,000/s
~~~~~~~~~~~~,--------"----.
;>
1
ms
..
20µs
flfiJ
UuulJ
I
I
1
STATUS
FLAG
I
~____.I
INPUT
CYCLE
OUTPUT CYCLE
STORAGE ENABLE
}
'"""""'"
COMPUTER CONTROL ENABLE
INTERNAL
MEASURE INHIBIT
STORAGE LIMIT
("10"
"20"
OR
"40"1
Figure 3-7. Computer Control Enable.
COMPUTER CONTROL ENABLE may be grounded to allow
readings
to be gated into storage and out-of storage using the same
line (MEASURE)
.
PRINTER HOLD-OFF
is
no longer needed .
STORAGE FLAG acknowledges each MEASURE
in
both storage
and output cycles
.
Section III
MEASURE
I
I
I IOA-8-2527
I
I
17T022µs
16 TO
20µs
•
v
1 TO 2µs
Figure 3-8. Data Storage Timing.
Data Storage running at a 50 kHz output rate
.
Each low going
Measure is acknowledged with a high going Storage Flag. The
Storage Flag remains high 16 to 20 ms. Continuous Cycle is
grounded to achieve this speed.
Table 3-3. Methods of Outputting Data.
Lines Used
Trigger Requirement
Triggers
=
Storage Limit
10,20,30,40,orSO
Jump
Triggers
<
Storage Limit
Last reading repeated to fill
Storage Limit
Preset Trigger
Trigger source may free run
"O",
"1 O", or
"
20"
Triggers counted automatically
Input Cycle Hold
DVM samples before and during
Grounded
storage
but not while printing
Measurement Hold
Trigger source may free run
Released from
Triggers counted automatically
Ground
DVM samples only when storing
3-13. OPERATION WITH SINGLE CHANNEL PLUG-INS.
3-14. There are
3 single channel
plug-ins available for use
with the
3480:
3481A
Single 10 V de range
3482A
5 de ranges from 100
m
V to 1000 V
3484A
5 ac or de
ranges
from I 00 m V to I 000 V
6 ohms ranges
from
I 00 il to I 0 Mil.
3-5
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