Instrument Changes Model
8903B
2.
Software date code: 2.1 1 1985
(2520A
to
2614A)
ROM part
numbers
ROM
1,1818-3741
ROM
2,1818-3742
ROM
3,1818-3743
ROM
4,1818-3744
ROM
5,1818-3745
ROM
6,1818-3746
ROM
7,1818-3747
ROM
8,1818-3748
ROM
9,1818-3749
3.
Software date code: 8.22 1986
(2652A
to
2818A)
The instrument
has
undergone
a
change
in
firmware. ROM memory
has
been consolidated
into
1
single ROM
(ROM
10, U31).
ROM part number
ROM
10,08903-80036
4.
Software date code: 2829
(2836A
and above)
The
08903-80050
is
now
capable
of
being
programmed
to
17.78
dBm
(6.0
volts)
in
the log mode. The previous ROM
(08903-80036)
could
not be programmed above
+15.56
dBm
(4.64
volts)
in
the log mode.
ROM part number
ROM
10,08903-80050
7-4.
HARDWARE CHANGE SUMMARY
1.
2730A and above
Aquasi-peak detector
is
added
to
the Output RMSJAVG detector
on
the
A4
Voltmeter assembly.
The part number for the new A4 assembly
is
08903-60183.
2.
2742A and above
The selectable
6000
or
500
Source Output Impedance
is
now
enabled fiom the fiont panel
as
a
special
function,
and
is
programmable over
HP-IB.
7-5.
CABINET PARTS COLOR CHANGE
1.
2910A and above
NOTE
Serial prefix
2910A
changes
the
color
of
the instrument covers and acces-
sories.
The
old
color
couer and accessories are
no
longer available. If
your
instrument
has
serial prefixes
2908A
and below, and
you
must
replace one
of
these parts, we recommend that you order the
full
set
of
covers and ac
cessories using the part numbers for serial prefix
2910A
and above.
Af-
fected cabinet parts are
MPl, MP4-6,
MP8,
MPIO-17, MP19,
and,
MP20
(see Table
6-3).
7-2
rev.
20
JUN91
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