HP 3455A - Page 22

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Section
III
Model 3455A
FRONT PANEL
Line Switch, push on/push oM
HP-lS* status indicators:
SRQ
-
indicates that the 3455A "requires service" from
the controller. Refer to Paragraph 3-78.
LISTEN
—
lights when the 3455A is
addressed
to
"listen".
TALK
—
lights when the 3455A is addressed to "talk".
REMOTE
—
lights when the 346BA is under
HP-18
control.
LOCAL
switch — permits the operator to
return
the
instrument to local (front
panel) control.
Display
-
Indicates polarity and
amplitude
of
the
measurement.
Measurement results
are presented in either
S-l/2 digits or
6-1/2 digits depending upon whether the
HIGH
RESOLUTION feature is off or on. An LED in the
upper left corner of the display indicates sample rate of
the 3455A. Five LED’s, located
to
the
right
of the dis-
play, Indicate whether
the
display it presenting
DC
Volt-
age,
AC
Voltage. Ohms. Scale or
%
error measurement
results.
Range Selection Keys
-
permit selection of ranges as
follows:
DC Volts: .1 V. 1 V, 10 V. 100 V. 1 kV. AUTO
AC Volts.
1
V.
10
V,
100
V.
1 kV.
AUTO
Ohms: .1
K.
1
K.
10 K. 100 K. 1.000 K. 10.000 K. AUTO
LED's
located
in
the center of the keys indicate which
range is selected.
Function
Selection
Keys
-
DC Volts,
AC
Volts.
FAST
AC
Volts.
2 WIRE
kn. 4 WIRE
kD.
and
TEST. LED's
located in the center of the keys indicate which function
it selected.
Auto Cal switch
-
allows the
Auto-Cal feature
to be turn-
ed on or
off.
LEO
in center of Key indicates Auto-Cal on.
Refer
to
Paragraph
3-29.
Data
Ready Request Indicator
-
lights when
the Data
Ready
Request feature is programmed on. Refer to
Paragraph 3-65.
High Resolution
switch
—
switches
display
from
5-1/2
digit
presentation
to
6-1/2 digit presentation. An
LED
located in the center of the key indicates High Resoiu-
tion on when lit.
Trigger Selection Keys - permits selection of INTER-
NAL. EXTERNAL, or HOLD/MANUAL trigger. Each
key
has an
LED
which lights
to
indicate the
trigger source
selected.
Sample Rate Controls
—
permit selection of maximum
sample
rate
or the present
sample rate divided by 2. The
maximum sample rate may
be divided by 2 up to 6 times
for
a
minimum sample rate of: maximum sample rate
Binary
Program Indicator
-
indicates whan
the 3455A is
operating in the Binary
Program mode. Refer
to
Paragraph 3-66.
Math
Controls
-
Select
SCALE
~
.
% ERROR
X-Y
''
(
X
100),
or MATH
OFF.
The
Math feature selected
Y
ia indicated
by an LED
located
in
the key (Paragraph
3-191.
ENTER controls
Recall the number stored
in the Y or Z
register
to
the display, alao
"ahifta" the from panel
keyboard
to
permit
entry of new data
to be
stored
in the
Y or Z registers (Paragraph 3-231.
STORE Controls
-
The Store controls transfer
the
number presently being
displayed into the
Y
or
Z register
(Paragraph 3-23).
Rear Terminal
Irxiicator
•
indicates
when the rear input
tarminala have been selected.
Figure 3-1. Front and Rear Panel Features.
3-0