Atec Agilent-8901A User Manual

HP 8901A Modulation Analyzer
150 kHz to 1300 MHz
Technical Specifications
H
Outstanding signal characterization
All parameters describe performance in automatic operation or properly set manual conditions. Specifications describe the instrument’s warranted performance. Supplemental characteris­tics (shown in italics) are intended to provide information useful in applying the instrument by giving typical, but non-warranted, performance parameters.
RF Input
Frequency Range: 150 kHz to 1300 MHz. Operating Level:
150 kHz to 650 MHz: 12 mV
(1 W
peak
).
650 MHz to 1300 MHz: 22 mV
(1 W
peak
).
(−25 dBm) to 7 V
rms
(−20 dBm) to 7 V
rms
rms
rms
Supplemental Characteristics
Tuning: Automatic, track (frequencies >10 MHz),
manual frequency entry.
Acquisition Time (automatic operation): ~1.5
second.
Input Impedance: 50 Ω nominal. Maximum Safe Input Level:
AC: 35 V
(25 W for source SWR <4)
rms
DC: 40 V
Frequency Modulation
Rates:
150 kHz to 10 MHz: 20 Hz to 10 kHz. 10 MHz to 1300 MHz: 20 Hz to 200 kHz1.
Deviations:
150 kHz to 10 MHz: 40 kHz peak maximum. 10 MHz to 1300 MHz: 400 kHz peak maximum1.
1 Maximum rate 20 kHz and peak deviation 40 kHz with 750 µs
de-emphasis filter.
2 Peak residuals must be accounted for in peak readings.
3 With 750 µs de-emphasis and pre-display “off,” distortion is not
specified for modulation autopilots >4 V peak. This can occur near maximum deviation for a measurement range at rates <2 kHz.
4 For optimum flatness, cables should be terminated with their
characteristic impedance.
Accuracy:
2
250 kHz to 10 MHz: ±2% of reading ±1 digit, 20 Hz
to 10 kHz rates.
10 MHz to 1300 MHz: ±1% of reading ±1 digit, 50 Hz
to 100 kHz rates.
±5% of reading ±1 digit, 20 Hz to 200 kHz rates.
Demodulated Output Distortion:
3
400 kHz to 10 MHz: <0.1% THD, deviations <10 kHz. 10 MHz to 1300 MHz: <0.1% THD, rates and
deviations <100 kHz.
AM Rejection (for 50% AM at 400 Hz and
1 kHz rates):2 <20 Hz peak deviation measured
in a 50 Hz to 3 kHz BW.
Residual FM (50 Hz to 3 kHz BW): <8 Hz
rms
at 1300 MHz, decreasing linearly with frequency to <1 Hz
for 100 MHz and below.
rms
Supplemental Characteristics
Maximum Deviation Resolution:
1 Hz, <4 kHz deviation. 10 Hz, 4 kHz to 40 kHz deviation. 100 Hz, 40 kHz to 400 kHz deviation.
Resolution: Is increased one digit with 750 µs
de-emphasis and pre-display on.
Demodulated Output Distortion: 150 to 400 kHz;
<0.3% THD, deviations <10 kHz.
Detectors: + peak, - peak, and average (rms sine
wave calibrated).
Demodulated Output Across an Open Circuit
(600 Ω output impedance):
4
1 mV/Hz when resolution is 1 Hz.
0.1 mV/Hz when resolution is 10 Hz.
0.01 mV/Hz when resolution is 100 Hz.
Stereo Separation (50 Hz to 15 kHz): >47 dB.
Phase Modulation
Carrier Frequency: 10 MHz to 1300 MHz. Rates: 200 Hz to 20 kHz.
Deviation and Maximum Resolution:
400
0.1 Radian Resolution
40
0.01 Radian Resolution
4
0.001 Radian
Peak phase deviation (radians)
Resolution
200 Hz 1 kHz 10 kHz 20 kHz
Modulation rate
Accuracy: 2 ±3% of reading ±1 digit. Demodulated Output Distortion: <0.1% THD. AM Rejection (for 50% AM at 1 kHz rates):
2
<0.03 radians, peak deviation.
Supplemental Characteristics
Modulation Rates: Usable from 20 Hz to 100 kHz
with degraded performance.
Detectors: + peak,−peak, average (rms sine wave
calibrated).
Demodulated Output across an Open Circuit
(600 Ω output impedance):
4
1 V/rad when resolution is 0.001 radian.
0.1 V/rad when resolution is 0.01 radian.
0.01 V/rad when resolution is 0.1 radian.
Amplitude Modulation
Rates:
150 kHz to 10 MHz: 20 Hz to 10 kHz. 10 MHz to 1300 MHz: 20 Hz to 100 kHz.
Depth: to 99%. Accuracy:
150 kHz to 10 MHz: ±2% of reading ±1 digit,
50 Hz to 10 kHz rates, >5% depth. ±3% of reading ±1 digit, 20 Hz to 10 kHz rates.
10 MHz to 1300 MHz: ±1% of reading ±1 digit,
50 Hz to 50 kHz rates, >5% depth. ±3% of reading ±1 digit, 20 Hz to 100 kHz rates.
Flatness (variation in indicated AM depth for
constant depth on input signal):
10 MHz to 1300 MHz: ±0.3% of reading ±1 digit, 90 Hz to 10 kHz rates, 20 to 80% depth.
2, 5
Demodulated Output Distortion: <0.3% THD for
50% depth, <0.6% THD for 95% depth.
FM Rejection (at 400 Hz and 1 kHz rates, 50 Hz
to 3 kHz BW):
250 kHz to 10 MHz: <0.2% AM for <5 kHz
2
peak
deviation. 10 MHz to 1300 MHz: <0.2% AM for <50 kHz
peak
deviation.
Residual AM (50 Hz to 3 kHz BW): <0.01%
rms
.
Supplemental Characteristics
Maximum Depth Resolution:
0.01% for depths 39.99%.
0.1% for depths 40%.
Detectors: peak [+ peak], trough [peak],
average (rms sine wave calibrated).
Demodulated Output Across an Open Circuit
(600 Ω output impedance):
4
0.1 V/percent when resolution is 0.01%.
0.01 V/percent when resolution is 0.1%.
Frequency Counter
Range: 150 kHz to 1300 MHz. Sensitivity:
150 kHz to 650 MHz: 12 mV 650 MHz to 1300 MHz: 22 mV
Accuracy: Reference accuracy ±3 counts of least
significant digit.
Internal Reference:
Frequency: 10 MHz. Aging Rate: <1x10−6/month.
(Optional: <1x10−9/day)6.
Supplemental Characteristics
Modes: Frequency, and frequency error (displays
the difference between the frequency entered via the keyboard and the actual RF input frequency).
Sensitivity in Manual Tuning Mode: Approximate
frequency must be entered from keyboard.
0.22 mV
(−60 dBm).
rms
Maximum Resolution:
10 Hz for frequencies <1 GHz.
100 Hz for frequencies 1 GHz.
Internal Reference Accuracy: Overall accuracy
is a function of time base calibration ± aging rate ± temperature effects ± line voltage effects
± short term stability.
(−25 dBm).
rms
(−20 dBm).
rms
2 Peak residuals must be accounted for in peak readings. 4 For optimum flatness, cables should be terminated with their
characteristic impedance.
5 For peak measurements only, AM accuracy may be affected by
distortion generated by the modulation analyzer. In the worst case this can decrease accuracy by 0.1% of reading for each 0.1% of distortion
6 After 30-day warm-up
Standard Option 002
Aging Rate <1 x 10
Temperature Effects <2 x 10 Line Voltage Effects <1 x 10
-6
/mo. <1 x 10
-7
/° C <2 x 10
-6
(+5%, −10% line voltage change)
Short term stability <1 x 10
2
<6 x 10
-9
-9
/day
-10
/° C
-10
for 1s average
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