HP 8901B Operation And Calibration Manual page 47

Model
8901B
Setting of the HP-IB address should be performed only
by
service trained
persons who are
aware
of
the potential shock hazard
of
working on a n
instrument with protective covers removed.
To avoid hazardous electrical shock, the line (Mains) power cable should be
disconnected before attempting to change the HP-IB address.
Installation
In t,,e Modulation Analyzer, the HP-Il3
t a l k
and listen addresses
are
selectable by an internal sw.xh
(Figure 2-2). This address can be read by selecting BUS
ADRS
(Blue Key,
LOCAL).
The following
procedure explains setting of the switches. Refer to Table 2-2 for
a
listing of the
t a l k
and listen
addresses. In the factory, the address is set for a
t a l k
address of
"N" and a
listen address of
"."
(period).
In binary, this is 01110; in decimal it is 14.
1.
Disconnect the line (Mains) power cable.
2. Remove any HP-Il3 cables or connectors from the HP-E3 connector.
3. Remove the Modulation Analyzer's top cover.
a. Remove the two plastic feet from the rear of the top cover by removing the pan-head Pozidriv
b.
Unscrew the Pozidriv screw at the center of the rear edge of the top cover. This
is
a captive
c. Lift off the top cover.
screw within each foot.
screw and
will
cause the top cover
to
pull away from the front frame.
4.
Locate the HP-IB address switch on the A14 Remote Interface Assembly near the front right of
the instrument. The A14 assembly may be recognized as having one brown and one yellow printed
circuit board extractor.
Figure 2-2. The HP-IB Address Switch Shown
as
Set by the Factory
The Address Shown is 01
11 0
i n Binary
(14
in Decimal) With Both Talk Only and Listen Only
Off
2-5