HP 8753D - Page 627

HP-IB
Status Indicators
When
the analyzer
is
connected
to
other
instruments
over
the
HP-IB
,
the
HP-IB
status
indicators
illuminate to
display
the
current
status
of
the
analyzer
.
The
HP-IB
status
indicators
are
located in
the
instrument-state
function
block
on
the
front
panel
of
the
network
analyzer
.
R
= Remote
Operation
L
=
Listen
mode
T
=
T
alk
mode
S
=
Service
request
(SRQ)
asserted
by
the
analyzer
Bus
Device
Modes
The
analyzer
uses
a
single-bus
architecture
.
The single
bus allows
both the
analyzer and
the
host
controller
to
have
complete
access
to
the peripherals
in the
system.
Three
dierent
controller
modes are
possible in
and HP-IB
system:
system-controller
mode
talker/listener
mode
pass-control
mode
Figure 11-3. Analyzer Single Bus Concept
Compatible Peripherals 11-19