Keithley 2015 Service Manual page 116

A-2 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
MODE
THD and individual
harmonic magnitudes
THD + n
SINAD
AC Level ±(0.13% of reading +
V rms
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
ACQUISITION
MODE
Single acquisition
or stored value
Automatic
ACCURAC Y
(1 Year, 23°C ±5°C) DISTORTION
±0.8dB, 0.004% or –87dB
20Hz to 20kHz 2 20Hz to 20kHz
±1.5 dB, 0.056% or –65dB
100Hz to 20kHz 2 20Hz to 20kHz
±1.5dB
100Hz to 20kHz 2 20Hz to 20kHz
0.009% of range)
20Hz to 20kHz
3
FUNDAMENTAL
FREQUENCY
RANGE
20 Hz to 100 Hz
100 Hz to 1 kHz
1 kHz to 20 kHz
20 Hz to 30 Hz
30 Hz to 400 Hz
400 Hz to 20 kHz
RESIDUAL
1
+65dB
MINIMUM
READINGS
PER
SECOND
14
24
28
5.5
6
6.6