Instrument Changes Model
8901B
Change
1
adds a few function settings not stored by the Store/Recall feature. Previously, when
the settings were recalled, the functions were set
to
their current settings instead of the stored
settings. The unstored functions were:
(1)
manually selected Tuned RF Level filtering (Special
Function
4),
(2)
power sensor calibration factor table entry when entry
is
in
progress,
(3)
the
last
calibrated power sensor type,
(4)
the HP-IB SRQ mask, and
(5)
the HP-Il3 Status
Byte.
Change
4
increases RF Power measurement resolution by a factor of
10
to
allow the instrument’s
power meter to be similar
to
other power meters.
1
mW now reads
1000.0
pW instead
of
1.000
mW.
Change
5
adds Special Functions
23
and
24
which are used with Option Series
030,
Selective Power
measurements. New hardware
and
firmware Change
17
(below) must also be added
to
implement
this feature. Compatibility with all other measurements
is
maintained.
4.
Software date code:
304.1985
(25514
only)
ROM part numbers:
ROM
1, 08901-80081
ROM
2,08901-80082
ROM
3,08901-80083
Change
7
increases digital averaging
to
reduce display bounce during noisy SINAD measurements
(Special hnction
5.1).
Change
I1
adds Special Function
31
which corrects for the noise floor when using the average
detector in ked RF Level on the lowest range. Special Function
31.0
disables the noise floor
correction. Special Function
31.1
enables the noise floor correction. Special F’unction
31.2
displays
the noise-floor correction status.
Change
13
adds Special Function
7.4
to increase the display resolution of RF frequency to
0.1
Hz
below
10
MHz and
1
Hz
above
10
MHz.
Change
14
improves the repeatability of the Set Reference feature in Tuned RF Level by averaging
several readings when computing the calibration reference.
Change
15
extends the frequency offset mode range to
200
GHz.
Change
16
adds Special Function
47
which displays certain instrument configuration details for
troubleshooting purposes. After keying in
47.0
SPCL the display will be of the form
<New Opt. Series 030><01d Opt. Series
030>
where
1
is yes and
0
is no. The new Option Series
030
refers
to
instruments with serial prefix
2642A
and above; old refers
to
older versions of the HP
8901B
Modulation Analyzer (which shares
the firmware).
Change
1
7
adds hardware identification of certain instrument configuration details needed for
Option Series
030
measurements. (Refer also to Change
16
above.)
Change
18
adds Special F’unctions
49.C
to read the Option Series
030
IF
RMS Detector.
Change
19
increases the averaging time in Tuned RF Level for instruments when Special Function
32.1
is in effect. (See also Change
12.)
7-2
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