THD+N Function
Fundamental Range 10 Hz–200 kHz.
Measurement Range 0%–100%.
Accuracy ±0.3 dB, 20 Hz–120 kHz harmonics.
Measurement Bandwidth
LF –3 dB <10, 22, 100, or 400 Hz.
HF –3 dB 22k, 30k, 80k, or >500 kHz
(Option filter selection also affects bandwidth).
Residual THD+N
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At 1 kHz £(0.00025% + 1.0 µV) [–112 dB], 22 kHz BW
(valid only for analyzer inputs £8.5 Vrms).
20 Hz–20 kHz £(0.0003% + 1.0 µV) [–110.5 dB], 22 kHz BW,
£(0.0005% + 2.0 µV) [–106 dB], 80 kHz BW,
£(0.0010% + 6.0 µV) [–100 dB], 500 kHz BW .
10 Hz–100 kHz £(0.0040% + 6.0 µV) [–88 dB], 500 kHz BW .
Minimum Input 5 mV for specified accuracy, usable to <100 µV
with fixed notch tuning.
Notch Tuning Modes Counter Tuned,
Sweep Track,
AGen-Track (analog generator),
DGen-Track (digital generator), or
Fixed (set by direct entry).
Notch Tracking Range ±2.5% from fixed setting.
Crosstalk Function
Frequency Range 10 Hz–200 kHz.
Accuracy
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±0.4 dB, 20 Hz–120 kHz.
Residual Crosstalk
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10 Hz–20 kHz £ –140 or 1 µV.
20 kHz–100 kHz
£ –126 dB or 2.5 µV .
IMD Measurements
with option “IMD”
Option “IMD” adds the capability to measure intermodulation distortion (IMD)
using three of the most popular techniques. The demodulated IMD signal can also be
selected for FFT analysis in SYS-2712 and SYS-2722 configurations.
SMPTE (DIN) IMD Function
Test Signal Compatibility Any combination of 40 Hz–250 Hz (LF) and
2 kHz–100 kHz (HF) tones, mixed in any ratio
from 0:1 to 8:1 (LF:HF).
IMD Measured Amplitude modulation products of the HF tone.
–3 dB measurement bandwidth is typically
20 Hz–750 Hz.
Analog Analyzer Chapter 6: Specifications
Getting Started with Your 2700 Series Instrument 61
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System specification measured with the 2700 series analog generator and the analog analyzer set to the
indicated measurement bandwidth (BW). Generator amplitude setting must be £12 Vrms balanced or
£6 Vrms unbalanced for specified system performance below 30 Hz. At higher amplitude settings generator
THD derates to 0.0020% from 20 Hz–30 Hz.
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Uses the 1/3-octave bandpass filter to enhance the measured range in the presence of wideband noise.
Alternate (interfering) channel input must be ³ 5 mV.
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