Distortion Characteristics - Keithley 2016 User Manual

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
MODE (1 Year, 23°C ±5°C)
THD and individual ±0.8dB,
harmonic magnitudes 20Hz to 20kHz
THD + n ±1.5 dB,
100Hz to 20kHz
SINAD ±1.5dB
100Hz 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
FUNDAMENTAL
FREQUENCY FUNDAMENTAL
ACQUISITION FREQUENCY
MODE
Single acquisition 20 Hz to 100 Hz
or stored value 100 Hz to
1 kHz to 20 kHz
Automatic 20 Hz to 30 Hz
30 Hz to 400 Hz
400 Hz to 20 kHz
Frequency Sweep Reading Rate
NUMBER OF FREQUENCIES
5
30
100
200
Notes
1. Input signal at full scale.
≥20% of range and harmonics >–65dB.
2. V
IN
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.
RESIDUAL
DISTORTION 1
0.004% or –87dB
2 20Hz to 20kHz
0.056% or –65dB
2
20Hz to 20kHz
+65dB
2 20Hz to 20kHz
3
MINIMUM
READINGS
PER
RANGE SECOND
14
1 kHz 24
28
5.5
6
6.6
TIME (seconds) 4
0.2
1.1
3.5
6.9
GENERATOR CHARACTERISTICS
FREQUENCY RANGE: 10–20kHz.
FREQUENCY RESOLUTION: 0.007Hz.
FREQUENCY ACCURACY: ±(0.015% of reading + 0.007Hz)
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)
Amplitude Temperature Coefficient: Typically 0.015%/°C.
1, 4, 5
Amplitude Flatness: ±0.1dB
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)
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.
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
0.0V ±0.05V to 3.3V ±0.08V pulse 100Ω load
Overshoot: 1.0V maximum pulse open circuit
0.2V maximum with 100Ω load pulse open circuit
Undershoot: 1.1V maximum pulse open circuit
0.45V maximum with 100Ω load pulse open circuit
Notes
1. 1 year, 23°C ±5°C.
2. Measured at V = 0V with gain 100 amplifier and 2-pole 50kHz low pass filter,
OUT
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.
1
.
1, 4
.
.
1, 4 .
.
1
1, 3 .
1, 3 .
3 .
3 .
3 .
3 .
SBG 11/13/03
Rev. D