HP-I B Connector
SH I ELD
C GN D ONLY
AT
SYSTEM CONTROLLER )
TYPE
5 7
CONNECTOR
HP-I B Logic Levels
Caution
'
IFC
SRO
GUARD
GROUNDS
NDRC
NRFD
DAV
C GND
RT
SYSTEM
CONTROLLER )
EOI
D I04
REN
Figure 3-3. HB-18 Connector
The rear panel HP-IB connector
(
Figure 3-3
)
, is compatible with
the connector on Cable Assemblies 10833A, B, C and D. If a cable
is to be locally manufactured, use male connector, HP part number
1251-0293.
The HP 81 12A HP-IB lines use standard TTL logic, the levels being
as follows:
•
True
=
Low
=
digital ground or 0 V de to 0.4 V de,
•
False
=
High
=
open or 2.5 V de to 5 V de.
All HP-IB lines have LOW assertion states. High states are held at
3.0 V de by pull-ups within the instrument. When a line functions
as an input, approximately 3 .2 mA of current is required to pull it
low through a closure to digital ground. When a line functions as an
output, it will sink up to 48 mA in the low state and approximately
0.6 mA in the high state.
The HP-IB line screens are not isolated from ground.
Installation
3-5
Summary of Contents for 8112A
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Page 144: ...8 32 Testing Performance ...
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Page 194: ...10 2 4 Servicing the Power Supply ...
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Page 240: ...10 4 16 Servicing the Shaper and Output Amplifier ...
Page 242: ...A R l BD RY MR I N 1 2 7 I I IJt 51 CR1 B e i 1 _ _ _ _ 20 ...
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Page 262: ...A B A2 ED RY CONTROL ...
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Page 290: ...R B c R3 BD RY M I CROPROCESSOR 1 2 3 FIGURE 1 0 7 8 ...
Page 294: ... 8 X2l 2 X2 Figure A 1 Mechanical Parts 1 A 2 Replaceable Parts ...
Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...
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Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...
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