2016 Total Harmonic Distortion Specifications
DISTORTION CHARACTERISTICS
VOLTAGE RANGE: 100mV, 1V, 10V, 100V, 750V (user selectable).
INPUT IMPEDANCE: 1MΩ paralleled by <100pF.
DISPLAY RANGE: 0–100% or 0–100.00dB.
RESOLUTION: 0.0001% or 0.00001dB.
FUNDAMENTAL FREQUENCY RANGE: 20Hz–20kHz.
HARMONIC FREQUENCY RANGE: 40Hz–50kHz.
FREQUENCY RESOLUTION: 0.008Hz.
FREQUENCY ACCURACY: ±0.01% of reading.
FREQUENCY TEMPERATURE COEFFICIENT: ≤100ppm over operating
temperature range.
MEASUREMENT ACCURAC Y RESIDUAL
MODE (1 Year, 23°C ±5°C) DISTORTION
1
THD and individual ±0.8dB, 0.004% or –87dB
harmonic magnitudes 20Hz to 20kHz
2
20Hz to 20kHz
THD + n ±1.5 dB, 0.056% or –65dB
100Hz to 20kHz
2
20Hz to 20kHz
SINAD ±1.5dB +65dB
100Hz to 20kHz
2
20Hz to 20kHz
AC Level ±(0.13% of reading +
V rms 0.009% of range)
20Hz to 20kHz
Distortion Measurement Audio Filters
None C-Message
CCITT Weighting CCIR/ARM
CCIR “A” Weighting
NUMBER OF HARMONICS INCLUDED IN THD CALCULATION: 2 to
64 (user selectable).
HI AND LO CUTOFF FILTERS (bus settable): 20Hz–50kHz. Can be
combined to form brickwall bandpass filter.
Distortion Measurement Reading Rate
3
FUNDAMENTAL MINIMUM
FREQUENCY FUNDAMENTAL READINGS
ACQUISITION FREQUENCY PER
MODE RANGE SECOND
Single acquisition 20 Hz to 100 Hz 14
or stored value 100 Hz to 1 kHz 24
1 kHz to 20 kHz 28
Automatic 20 Hz to 30 Hz 5.5
30 Hz to 400 Hz 6
400 Hz to 20 kHz 6.6
Frequency Sweep Reading Rate
NUMBER OF FREQUENCIES TIME (seconds)
4
5 0.2
30 1.1
100 3.5
200 6.9
Notes
1. Input signal at full scale.
2. V
IN
≥20% of range and harmonics >–65dB.
3. Speeds are for default operating conditions (*RST), and display off, auto range
off, binary data transfer, trig delay = 0.
4. Typical times: frequencies in 400–4kHz range, binary data transfer, TRIG
DELAY = 0, Display OFF, Auto Range OFF. Data returned is THD measurement
plus AC voltage.
GENERATOR CHARACTERISTICS
FREQUENCY RANGE: 10–20kHz.
FREQUENCY RESOLUTION: 0.007Hz.
FREQUENCY ACCURACY: ±(0.015% of reading + 0.007Hz)
1
.
FREQUENCY TEMPERATURE COEFFICIENT: <100ppm over operating
temperature range.
SOURCE OUTPUT:
Waveform: Sinewave.
Amplitude Range: 2V rms (50Ω and 600Ω) or 9.5V rms (HI Z).
Amplitude Resolution: 1.25mV rms (50Ω and 600Ω) or 2.5mV rms (HI Z).
Amplitude Accuracy: ±(0.3% of setting + 5mV)
1, 4
.
Amplitude Temperature Coefficient: Typically 0.015%/°C.
Amplitude Flatness: ±0.1dB
1, 4, 5
.
Output Impedance: 50Ω ±1Ω or 600Ω ±10Ω, user selectable.
THD: –64dB
6
.
Noise: 250µV rms
2
.
DC Offset Voltage: ±3mV
1
.
INV/PULSE OUTPUT (SINEWAVE MODE):
Frequency: Same as source output.
Amplitude Range: 2V rms (50Ω and 600Ω) or 9.5V rms (HI Z).
Amplitude Resolution: 1.25mV (50Ω and 600Ω) or 2.5mV rms (HI Z).
Amplitude Accuracy: ±(2.0% of setting + 5mV)
1, 4
.
Amplitude Flatness: ±0.1dB
1, 4, 5
.
Output Impedance: Same as Source Output setting.
THD: –64dB
6
.
Noise: 250µV rms
2
.
DC Offset Voltage: ±3mV typ., ±13mV max.
1
INV/PULSE OUTPUT (PULSE MODE):
Frequency: Same as source output.
Duty Cycle: 45% ±3%.
Output Impedance: Same output impedance as the source output.
Amplitude: 0.0V ±0.07V to 4.9V ±0.12V pulse open circuit
1, 3
.
0.0V ±0.05V to 3.3V ±0.08V pulse 100Ω load
1, 3
.
Overshoot: 1.0V maximum pulse open circuit
3
.
0.2V maximum with 100Ω load pulse open circuit
3
.
Undershoot: 1.1V maximum pulse open circuit
3
.
0.45V maximum with 100Ω load pulse open circuit
3
.
Notes
1. 1 year, 23°C ±5°C.
2. Measured at V
OUT
= 0V with gain 100 amplifier and 2-pole 50kHz low pass filter,
Inv/Pulse in sinewave mode, HI Z output impedance, and no load.
3. With HI Z output impedance and 1m 50Ω coaxial cable.
4. HI Z output impedance, no load.
5. 4V output.
6. THD measurement includes harmonics 2 through 5, 1V rms output, HI Z, no
load.
SBG 11/13/03
Rev. D
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