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Performance Tests
Model 8902A
Performance Test 1-AM
Specification
I
Characteristic
AMPLITUDE MODULATION
Rates
Depth
Accuracy(
1*293*4)
Flatness
(
' * ' )
Demodulated Output
Distortion
Residual AM
FREQUENCY MODULATION
AM Rejection(2)
I
PHASE MODULATION
AM Rejection(2)
Performance Limits
20 Hz to 10 kHz
20 Hz to 100 kHz
To 99%
& ? O / O
of reading
i 3 %
of reading
i l %
of reading
f 3 %
of reading
i l
digit
i l
digit
i l
digit
f l
digit
M.3%
of reading
f l
digit
<0.3% THD
<O.6% THD
<0.01% rrns
<20
Hz peak deviation
~ 0 . 0 3
rad peak deviation
Conditions
150 kHz to 10 MHz carrier
10 to 1300 MHz carrier
150 kHz to 10 MHz carrier;
150 kHz to 10 MHz carrier;
10 to 1300 MHz carrier;
10 to 1300 MHz carrier;
50 Hz to 10 kHz rates; 5 to 99% depth
20 Hz to 10 kHz rates; to 99% depth
50 Hz to 50 kHz rates; 5 to 99% depth
20 Hz to 100 kHz rates; 5 to 99% depth
10 to 1300 MHz carrier;
90 Hz to 10 kHz rates; 20 to 80% depth
4 0 % depth
<95% depth
50 Hz to 3 kHz bandwidth
50% AM depth;
400 Hz and 1 kHz
rates;
50 Hz to 3 kHz bandwidth
50% AM depth; 1 kHz rate;
50 Hz to 3 kHz bandwidth
( l )
But not to exceed 50 kHz rates with rms detector.
('1 Peak residuals must be accounted for in peak readings. (Refer to Residual
Noise
Effects in Detailed
Operating
lnstrucfions
in Section 3.)
(3)
For peak measurements only, AM accuracy may be affected by distortion generated by the Measuring
Receiver. In the worst case, this can decrease accuracy by 0.1% of reading for each
0.1%
of distortion.
( 4 )
For rrns detector, add 33% of reading.
(')
Flatness is the variation in indicated AM depth for constant depth on input signal.
For optimum flatness, cables should be terminated with their characteristic impedance.
4-2
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