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SECTION III
Model 4277A
Table 3-6. Operation Error Codes Displayed on DISPLAY A/B (Sheet 2 of 3)
ERROR CODE
Meaning
Treatment
Illegal LCjzl RANGE, DISPLAY
A, FREQ, or TEST SIG LEVEL
setting.
'Ihe instrument
will automatically
select the correct
setting.
Illegal DC BIAS or COMPARATOR
operation.
Internal dc bias
voltage was set via the HP-IB,
but the instrument is not
equipped with Option 001; or
the comparator enable code
(El) was sent via the HP-IB;
but the instrument is not
equipped with Option 002.
Install the
desired option.
Refer to Section
II.
Illegal COMPARATOR operation.
The D/Q/ESR/G key on the
16064A was pressed or was set
via the HP-IB while the
DISPLAY A function was set to
D, Q, ESR, or G
comparison cannot
be performed.
The instrument is
set to HIGH SPEED
HIGH SPEED C , HIGH SPEED L,
L or HIGH SPEED C
or
Z
measurement mode.
Illegal COMPARATOR operation.
One of the 4277A's front
panel keys (except TRIGGER,
LOCAL, or DC BIAS) was
pressed or was set via the
HP-IB.
Illegal COMPARATOR operation.
One of the 16064A's keys
(except
the COMPARATOR
ENABLE key) was pressed or
was set via HP-IB while the
16064A was disabled.
To change a front
panel control
setting on the
4277A, first
disable (turn off)
the 16064A.
Press
the COMPARATOR
ENABLE key (the
lamp at the center
of the key should
go off) .
To operate the
COMPARATOR, first
enable (turn on)
the 16064A.
Press
the COMPARATOR
ENABLE key (the
lamp at the center
of the key should
come on).
3-14
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