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SECTION in
3-94. DATA OUTPUT
3-95. Measurement and status data are output
to external devices in bit parallel, byte serial
format via the eight DIO signal lines of the
HP-IB.
Data can be output in ASCII mode or
PACKED
BINARY
mode.
Each
mode
is
described below.
[11 ASCII mode
Output data in this mode includes status data,
key status (function) data, and measurement
data
(including
range)
for
DISPLAY
A and
DISPLAY B. If the instrument is equipped with
Option 002, comparison data (LOW, IN, HIGH)
for L/C/ i Z ! and D/Q/ESR/G, and BIN number
data can be output, too. The output format is
shown in Figure 3-25. All characters are coded
in accordance with ASCII coding conventions.
[2] PACKED BINARY mode
Output data in this mode is output as one or two
binary
bytes,
rather
than
as
a
character
representation.
This data output format is for
high speed data transfer.
Contents of output
data, however, is less than that of ASCII mode.
Output data in this mode includes status data for
DISPLAY A and DISPLAY B, measurement range
data as an 8-bit byte, and measurement data of
DISPLAY A and DISPLAY B (not including unit
and decimal point) as a 16-bit, 2's complement
binary word. If the instrument is equipped with
Option 002, comparison data (LOW, IN, HIGH)
for L/C/ i Z I and D/Q/ESR/G, and BIN number
data can be output as an
8-bit
byte.
The
displayed
data
is
output
as
the
equivalent
decimal values of the resulting words.
The
output format is shown in Figure 3-25.
Model 4277A
3-96.
PARAMETER SETTING
I
\
3-97. Test frequency, DC bias (Option 001), and
bin limits (Option 002) can be set via remote
programming.
[1]
Test Frequency Setting
FR XXX.X EN
(
1
)
(1)
Setting value, in kHz.
Note
When an illegal frequency that is within
the instrument's frequency range is set,
the frequency below the illegal setting
is automatically selected. For example
:
"FR75.9EN": 75.5kHz
displayed
on
FREQUENCY/DC
BIAS
DISPLAY
[2]
DC Bias Setting (Option 00i only)
BI +XX.X EN
Cl)
(1)
Setting value, in volts.
Note
If not set, polarity sign is automatically
set to plus (+).
[3]
Comparator Limit Setting (Option 002
only)
(Low Limit)
LL XX.XXX EN
(1)
(High Limit)
LH XX.XXX EN
(1)
(1)
Setting
value.
The
position of
the
decimal point
must
agree
with
the
measurement
range.
Unit
is
in
accordance with the unit indicators of
DISPLAY A or DISPLAY B.
3-58
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