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Performance Tests
Model 8902A
Performance Test
2-FM
Specification
Characteristic
FREQUENCY MODULATION
Rates(')
Demodulated Output
Residual FM
Residual FM
Performance Limits
20 Hz to 10 kHz
20
Hz to 200 kHz
20 Hz to 20 kHz
40
kHz peak maximum
400 kHz peak maximum
40
kHz peak maximum
e%
of reading
f l
digit
f l
O / O
of reading
f l digit
f5%
of reading
f l digit
<0.1%
THD
<0.1
' / o
THD
<8
Hz rms at 1300 MHz
decreasing linearly with
frequency to
<1
H z rms
for
100 MHz and below
Conditions
150 kHz to 10 MHz carrier
10
to
1300 MHz carrier
10 to 1300 MHz carrier;
750
ps
de-emphasis
150 Hz to
10 MHz carrier
10
to
1300 MHz carrier
10 to 1300 MHz carrier;
750
ps
de-emphasis
250 kHz to 10 MHz carrier;
20 Hz to
10 kHz rates;
<40
kHz peak deviation
10 to
1300 MHz carrier;
50 Hz to
100 kHz rates;
<400 kHz peak deviation;
<40 kHz peak deviation
with 750
p . s
de-emphasis
10 to
1300 MHz carrier;
20
Hz to 200 kHz rates;
<400 kHz deviation;
<40 kHz peak deviation
with 750
ps
de-emphasis
400
kHz to
10 MHz carrier;
20
Hz to 10 kHz rates;
<lo
kHt peak deviation
10 to 1300 MHz carrier;
20
Hz to 100 kHz rates;
<1 00 kHz peak deviation;
<40
kHz peak deviation
with 750
ps
de-emphasis
50
Hz to
3
kHz bandwidth
But not to exceed 50 kHz rates with rms detector.
( 2 )
Peak residuals must be accounted for in peak readings. (Refer to
Residual Noise Effects
in
Derailed
Operating
instructions in Section 3.)
(3)
For rms detector, add
f3% of reading.
( 4 )
With 750
ps
de-emphasis and pre-display "off", distortion is not specified for modulation outputs >4V
( 5 )
But not to exceed 20 kHz rates and
40
kHz peak deviation with 750 , u s de-emphasis.
peak. This can occur near maximum deviation for a measurement range at rates
<2
kHz.
4-8
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