Model 4145A
SECTION I
l-8.
The 4145A is equipped with a flexible-disc
drive unit that accommodates a singlesided,
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single-density, 13.3cm (5.25 in.), 92K byte disc.
One cleaning disc and five work-discs--each
containing the necessary operating system
software, four general purpose measurement
programs, and 36.6K bytes of user area-are
furnished with the 4145A. Up to 47
measurement setup programs or 11 sets of
measurement data, plus auto sequence programs,
can be stored (SAVE) in the user area and
recalled (GET) later. Additional discs can be
purchased to increase storage capability, and the
entire user area of each disc can be quickly
copied.
l-9.
All instrument functions are handled by a
high speed microprocessor, under the control of
the operating system software stored on each
furnished flexible disc. Measurement setup,
display mode selection, graphic scaling,
diagnostics, operation guide, menu, and catalog
are arranged as individual display pages. Paging
is controlled by the MENU, PREV, and NEXT
keys. Instructions, softkey labels, and error
messages and codes are displayed on each page.
Also, the 4145A is remotely controllable via the
HP-IB and the 4145A’s display can be used as an
independent display via the HP-IB.
L’
l-10. Furnished with the 4145A is the 16058A, a
specially designed shielded test fixture which
connects to the 4145A’s rear panel.
Eight
different interchangeable DUT boards are
provided, allowing measurement of diodes;
S-terminal and 4-terminal transistors; 8-pin,
lo-pin, and 12-pin devices; and 18-pin and 24-pin
DIP ICs. The 16058A is equipped with a
lightshielded lid to allow stable measurement of
light-sensitive devices, such as photo diodes,
photo transistors, and photo resistors. Also, to
insure operator safety when potentially
dangerous voltages are applied to a sample, a
warning will be displayed on the 4145A if the
test fixture lid is open and measurement will not
be made until the lid is closed. For
user-fabricated test fixtures and jigs, a special
connector, four S-meter triaxial cables, and four
S-meter coaxial cables are also furnished.
l-l 1. SPECIFICATIONS
1-12. Complete specifications of the Model
4145A Semiconductor Parameter Analyzer are
given in Table l-l. These specifications are the
performance standards or limits against which
the instrument is tested. The test procedures
for the specifications are covered in Section IV,
Performance Tests.
Table l-2 lists Reference
Data. Reference Data are not specifications but
are typical characteristics included as additional
information for the operator. When the 4145A
Semiconductor Parameter Analyzer is shipped
from the factory,
it meets the specifications
listed in Table l-l.
1-13. SAFETY CONSIDERATIONS
1-14. The Model 4145A
Semiconductor
Parameter Analyzer has been designed to
conform to the safety requirements of an IEC
(International Electromechanical Committee)
Safety Class I instrument and is shipped from the
factory in a safe condition.
1-15. This operation and service manual
contains information, cautions, and warnings
which must be followed by the user to ensure
safe operation and to maintain the instrument in
a safe condition.
1-16. INSTRUMENTS COVERED BY MANUAL
1-17. Hewlett-Packard uses a two-section nine
character serial number which is stamped on the
serial number plate (Figure 1-2) attached to the
instrument’s rear-panel. The first four digits and
the letter are the serial prefix and the last five
digits are the suffix. The letter placed between
the two sections identifies the country where the
instrument was manufactured. The prefix is the
same for all identical instruments; it changes
only when a change is made to the instrument.
The suffix, however, is assigned sequentially and
is different for each instrument. The contents
of this manual apply to instruments with the
serial number prefix(es) listed under SERIAL
NUMBERS on the title page.
Figure l-2. Serial Number Plate.
l-3
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