General
Information
Model
8901B
Table
1-1.
Specifications
(2
of
6)
AM
Accuracy
‘2%
Of
reading
21
digit
Amplitude Modulation
RATES:
20
Hz to
10
kHz,
150
kHz
Sf,<
10
MHz.
20
Hz to
100
kHz,
10
MHz
5fcl
1300 MHz.
DEPTH:
to
99%.
ACCURACY3*
4*
5:
Frequency Range Rates Depths
150 kHz-10 MHz 50 Hz-10 kHz
5%-99%
FM Accuracy Frequency Range Rates
I
23%
of
reading
I
21
digit
Deviations
150 kHz-10 MHz
Flatness Frequency Range Rates
21
digit
90
Hz-10 kHz
*0.3%
of
reading
MHz-1300
MHz
I
20 Hz-10 kHz
Depths
20%-80%
I
to
99%
I
<0.1%
I
”%
Of
reading
I
10 MHz-1300 MHz
I
50 Hz-50 kHz
I
5%-99%
I
21
digit
10
MHz-1300 MHz
20
Hz-100 kHZ <lo0 kHZ
I
+’%
Of
reading
I
10 MHz-1300 MHz
I
20 Hz-100 kHz
I
to
99%
I
21
digit
AM
Rejection Frequency Range Rates
<20
HZ
peak
deviation
150 kHz-1300 MHz
400
Hz
or
1 kHz
AM
Depths
550%
DEMODULATED OUTPUT DISTORTION:
<0.3% THD
for
550%
depth.
<O.S%
THD for
595%
depth.
FM
REJECTION
(50
Hz TO
3
kHz BW)4:
RESIDUAL AM
(50
HZ
to
3
kHz BW):
<O.Ol%,,,.
Maximum
Resolution
Supplemental Characteristics:
Maximum
Sensitivity
Demodulated Output Deviations
(4
F)
DETECTORS:
+peak, -peak, kpeak/2, peak hold,
MAXIMUM DEPTH, RESOLUTION, AND MAXIMUM
DEMODULATED OUTPUT SENSITIVITY ACROSS
AN OPEN CIRCUIT
(600Q
OUTPUT IMPEDANCE)’:
average
[rms
sinewave calibrated), rms.
Maximum
Demodulated Output
Sensitivity
Maximum
Resolution
Depths
10
Hz
I
0.001
%
I
0.1
V/percent
AMrms<3.0%
1
(rms detector
only)
4.0
kHz
I
0.1
mV/Hz
dF,,,,c40
kHz
But not
to
exceed:
50
Hz to
40
kHz rates for stoted accuracy with rms
Peak residuals must be accounted for in peak readings.
For peak measurements only:
AM
accuracy may be affected b!. distortion
generated by the Analyzer.
In
the worst case this distortion can decrease
accuracy by
0.1%
of reading for each
0.1%
of
distortion.
6
Flatness is the variation in indicated
AM
depth for constant depth
on
input signal.
’
For optimum flatness. cables should be terminated trith their choracteris-
tic impedonce.
detector.
1-20
0.1%
0.01%
I
0.01
V/percent
AMpeak?40.
0%
0.1
V/percent
AMpeak<40.0%
I
22’”,10f~$lng
I
250 kHz-10 MHz
I
20
Hz-10 kHz
I
540
kHzpeak
I
1
I
I
+’%
Of
reading
10 MHz-1300 MHz
1
50 Hz-100 kHz
I
5400
kHZpeak
+l
dlglt
I
1
HZ
0.1
Hz
(rms detector
only)
I
pr5Xadlng
21
dlglt
I
10 MHz-1300 MHz
I
20
Hz-200 kHz
I
5400
kHZpeak
1.0
mV/Hz
AF,,,<4
kHz
1.0
mV/Hz
4(ms<0.3
kHz
For
rms detector add 23%
of
reading.
DEMODULATED OUTPUT DISTORTION8,
9:
I
THD
I
Frequency Range
I
Rates
I
Deviations
I
I
<0.1%
I
400
kHz-10 MHz
I
20 Hz-10 kHz
I
<lo
kHz
I
~ ~~
RESIDUAL FM
(50
Hz
to
3
kHz BW):
<8
Hz,,, at
1300
MHz, decreasing linearly with
frequency
to
<I
Hz,,,
for
100
MHz and below.
Supplemental Characteristics:
MAXIMUM FM DEVIATION, RESOLUTION, AND
MAXIMUM DEMODULATED OUTPUT SENSITIVITY
ACROSS AN OPEN CIRCUIT
(600Q
OUTPUT
IMPEDANCEI7:
I
100
Hz
I
0.01
mV/Hz
I
aF,,,r40
kHz
Resolution is increased one digit with
750
ps
de-emphasis and pre-display on.
The demodulated output signal present at the
Modulation Out/Audio In connector is increased in
ampliiude
by
a factor
of
10
with
750
ps
de-emphasis.
But
not
to exceed:
20
kHz rates and
40
kHz peak deviations with
750
j~s
de-emphasis filter.
1Vith
750
FS
de-emphasis and pre-display
“off.”
distortion is
not
specified
for modulation outputs
>4V
peak. This condition can occur near maxi-
mum deviation for a measurement ronge. at rates
<2
kHz.
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