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SECTION
in
Model 4277A
3-100.
LEARN MODE DATA
3-101.
All front panel settings and comparator
key settings are output from the 4277A when the
program code "LN" is used (refer to Figure
3-28).
The data is output in
the
following
format:
FRnnnnEN
An
Bn
Cn
Dn
En
Mn
Pn
(1)
(2) (3) (4) C5) C6) C7) C8)
Rn
Sn
Tn
lln
Vn
Xn
(9) (10)C11)C12)(13)(14)
BItnnnnEN
En
Gn
Ln
Nn
(15)
(16)(17) (18)(19)
(20)
(1) Test Frequency Setting
(2) A1-A5: DISPLAY A Function
(3) B1-B3: DISPLAY B Function
(4) C1-C3: Circuit Mode
(5) DO, Dl: Data Ready
(6) F1-F4: Output Data Format
(7) Ml - M3: Measurement Speed
(8) PO,
PI :
Output Data Mode (ASCII or
Packed Binary)
(9) R1 - R8: LC !
Z
I
Range
(10) SO, SI: Self Test
(11) T1,T2: Trigger Mode
(12) UO, Ul: Auto Range
(13) VI, V2: Test Signal Level
(14) XO, XI: Deviation Measurement
(15) DC Bias Setting
(16) EO, El: Comparator Enable
(17) GO, G1: Comparator Run
(18) LI, L2: Comparator Limit Input
(19) N1-N9:
Comparator Bin
Number for
L/C/ I Z I
(20) Data Terminator
Note
DC Bias data is not output when DC
Bias
option
(Option
001)
is
not
installed.
Similarly,
when
the
comparator
(Option
002)
is
not
installed, comparator data is not output.
Note
Don't open the UNKNOWN terminals
no test
fixture
or
test leads when
LEARN mode data is output in AUTO
range. If so, measurement range is not
fixed
in
some
eases.
There
is
no
problem
when
a
test
fixture
is
connected to the UNKNOWN terminals
or when measurement range is set to
MANUAL mode.
3-102.
RECALL COMPARATOR LIMIT DATA
3-103.
Low and high bin limits can be output
from the 4277A when the program code "LR" is
used (refer to Figure 3-30). The L/C/ | Z | limits
for the designated bin are output when program
code "LI" is used.
When program code "L2" is
used, D/Q/ESR/G limits are output. The data is
output in the following format:
LLXX.XXXEN
LHXX.XXXEN
(1)
(2)
(3)
(1) Value of Low Limit (position of decimal
point is coincident with display)
(2) Value of High Limit (position of decimal
point is coincident with display)
(3) Data Terminator
3-104. SERVICE REQUEST STATUS BYTE
3-105, The 4277A outputs an RQS (Request
Service) signal whenever it is set to one of the
five possible service request states. Figure 3-26
shows the contents of the Status Byte.
3-64
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