Agilent Technologies 8504B - Page 237

FINAL TRIM SIZE : 7.5 in x 9.0 in
Reference
Keys,
Softkeys,
and
Connectors
USE
P
ASS
CONTROL
Allows
control of
the 8504B
with
the
computer
over
HP-IB
as
with
the
talker/listener
mode,
and also
allows
the
8504B
to
become
the
active
controller
in order
to plot,
print,
or
directly
access
an
external
disk.
During
this
peripheral operation,
the host
computer is
free
to
perform
other
internal
tasks
that do
not require
use of
the
bus
.
The
bus
is
tied
up
by
the
8504B
during
this time
.
The
pass control
mode
requires
that
the
external
controller
is
programmed
to
respond
to a
request
for
control
and
to
issue
a
take
control
command.
Then
the
peripheral operation
is
complete
,
the
8504B
passes
control
back
to
the
computer
.
In
general,
use
the
talker/listener
mode
for
programming
the
8504B
unless
direct peripheral
access
is
required.
Key
Path:
4
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USE PASS
CONTROL
USER
STD
[10
dB]
Selects
a
reectance percentage
value when
an
optional
user-dened
value
is
desired
(not necessarily
10 dB).
The
default
value
is
given
as
10
dB
and
is
changed
using the
knob,
number
keys
,
or
step
keys
.
This
process
is
used
when
you
have
an
optical device
of
known
reectance
that
you
can
use
to
calibrate
the
magnitude
.
This process
improves
dynamic
accuracy
.
K
ey
Path:
4
CAL
5
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CALIBRATE
MENU
,
N
N
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N
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NN
N
CALIBRATE
MAGNITUDE
,
NN
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USER
STD
[10
dB]
VERT:
LOG
MAG
Displays
the
magnitude
data
in
logarithmic
format.
This
is
the
standard
format for
displaying
return
loss
in
dB
versus
distance
or
time
.
Key
Path:
4
F
ORMA
T
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VERT: LOG
MAG
VGA
connector
This rear-panel
connector is
used to
drive
an
external
V
GA
display
.
VOLUME
NUMBER
Species the volume
number of the external disk to be accessed. In general,
all 3.5-inch oppy disks
are considered one volume (volume 0). F
or hard
disk drives such as the
HP 9153A Winchester drive
, a switch in the disk
drive must be set to dene the number of volumes on the disk. Refer to
the
individual disk drive manual for more information.
Key P
ath: 4
LOCAL
5 ,
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VOLUME NUMBER
5-50
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