HP
11757B
Installation
and
Calibration
Logic
Lev
els
The
Hewlett-Pac
k
ard
In
terface
Bus
Logic
Lev
els
are
TTL
compatible,
i.e.,
the
true
(1)
state
is
0.0
Vdc
to
+0.4
Vdc
and
the
false
(0)
state
is
+2.5
Vdc
to
+5.0
Vdc.
Mating
Connector
HP
1251-0293;
Amphenol
57-30240.
Mating
Cables
Av
ailable
HP
10833A,
1
metre
(3.3
ft),
HP
10833B,
2
metres
(6.6
ft)
HP
10833C,
4
metres
(13.2
ft),
HP
10833D,
0.5
metre
(1.6
ft)
Cabling
Restrictions
1.
A
Hewlett-Pac
k
ard
In
terface
Bus
system
may
con
tain
no
more
than
2
metres
(6.6
ft)
of
connecting
cable
p er
instrumen
t.
2.
The
maxim
um
accum
ulativ
e
length
of
connecting
cable
for
an
y
Hewlett-Pac
k
ard
In
terface
Bus
system
is
20.0
metres
(65.6
ft).
Figure
1-4.
Hewlett-P
ackard
Interface
Bus
Connection
11
