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Model 4277A
SECTION m
Note
Note
Option annunciation 16064 appears only
If one of the error-codes listed in Table
when
the
16064A
Comparator
is
3-3 or Table 3-4 is displayed, contact
connected to the rear panel.
the nearest Hewlett-Packard Sales or
Service Office for repairs.
Table 3-2. Number of Counts on DISPLAY B
3-23. Error-codes related to operator errors are
listed in Table 3-6.
Corrective action for each
error is also given in the table.
3-24. OPERATIONAL ANNUNCIATION
3-25.
On instruments equipped with Option 001,
DC BIAS, the annunciation shown in Table 3-5
may briefly appear on the FREQUENCY/DC
BIAS display after a new de bias voltage has
been set. It indicates that the DC BIAS ON/OFF
switch on the front panel is set to OFF.
This
switch must be set to ON if voltage from the
internal dc bias source is to be applied to the
DUT.
Note
For applications using the internal dc
bias source, the DC BIAS select switch
on the rear panel must be set to INT.
3-20.
ERROR-CODES
3-21.
Error-codes related
to the
ROM/RAM
test (see paragraph 3-7) are listed in Table 3-3.
If one of these errors is displayed on DISPLAY A
when the instrument is turned on, measurements
can not be made.
Note
If E68 is displayed, measurements can
be.
The
instrument's
continuous
memory function, however, is disabled.
3-22.
Error-codes related to the Analog Circuit
test (see paragraph 3-11) are listed in Table 3-4.
If one or more of these errors are displayed on
DISPLAY A during Self Test, the specifications
listed in Table 1-1 are not guaranteed.
3-19.
The
FREQUENCY/DC
BIAS
display
provides direct readout of test frequency and, if
the instrument is equipped with Option 001, the
voltage output from the internal dc bias source.
If Option 001 is installed, option annunciation
001 is displayed on this display each time the
instrument
is
turned
on.
If
the
DC
BIAS
ON/OFF switch is set to OFF when the de bias
voltage is changed, OFF will be briefly displayed
on this displayed after the new value has been
set.
Refer to paragraph 3-24.
Also, if the
instrument is equipped with Option 002, BIN
numbers are displayed on this display when the
16064A Comparator is enabled.
3-11
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