Service manual

Agilent 8494A/B, 8495A/B, 8496A/B Operating And Service Manual 1
Instrument Definition
This manual contains installation, operation and test information for the
Agilent Technologies 8494A/B, 8495A/B, and 8496A/B step attenuators.
The instruments covered by this manual have a two-part serial number. The
first four digits and letter comprise the serial number prefix. The last five
digits form the sequential suffix that is unique to each instrument. The
contents of this manual apply to instruments with serial prefixes 2544A and
above.
Older instruments, those with serial number prefixes of 2543A and below,
are documented in this manual under “Manual Changes” below.
An instrument manufactured after the printing of this manual may have a
serial prefix that is not listed above. An unlisted serial prefix indicates that
the instrument is different from those documented in this manual. A manual
for an unlisted instrument is supplied with a Manual Change supplement
containing change information that documents the differences.
Manual Changes This section contains information for adapting this manual to older
instruments. If your instrument's serial number prefix is 2543A or lower, you
may document your instrument by following the instructions below. If your
instrument has a serial number prefix higher than is listed in this manual, it
may be documented in a separate manual supplement.
If you have an older instrument, one with a serial number prefix of 2543A or
lower, you must make the following changes to this manual in order for this
manual to apply to your instrument.
• In “Specifications” on page 3, change the attenuation repeatability to
0.03 dB, typical after 1 million cycles.
• In “Specifications” on page 3, change the minimum life to >1 million
steps or switchings per section.