“IMD (D/A)” Signal Family
SMPTE/DIN Test Signal
LF Tone 40 Hz–500 Hz.
HF Tone 2.00 kHz–50 kHz.
Mix Ratio 4:1 or 1:1 (LF:HF).
Residual IMD
7
£0.0010% [–100 dB], 60/7 kHz or 250/8 kHz.
CCIF/DFD Test Signal
Difference Frequency 80 Hz–2 kHz.
Center Frequency 4.50 kHz to >50 kHz.
Residual CCIF IMD
9
CCIF: £0.0004% [–108 dB], 14 kHz/15 kHz.
DFD: £0.0002% [–114 dB], 14 kHz/15 kHz.
DIM Test Signal
Squarewave Frequency 3.15 kHz for DIM30 and DIM100,
2.96 kHz for DIMB.
Sinewave Frequency 15.00 kHz for DIM30 and DIM100,
14.00 kHz for DIMB.
Residual IMD
8
£0.0020% [–94 dB].
Other Signals
Arbitrary and Multitone Waveforms (“Arb Wfm”)
Signal Determined by the associated file specified in the
panel drop-down box.
Frequency Range 20 Hz to 47% of Sample Rate.
Length 256 points–16384 points per channel. Utility is
provided to prepare waveform from frequency,
amplitude, and phase data.
Frequency Resolution Sample Rate ÷ Length
[2.93 Hz at 48 ks/s for a waveform 16384 points
in length].
Maximum Number of Tones (Length / 2) –1 [8191 for Length = 16384].
Maximum Length Sequence (“MLS”)
Sequences Four pink, four white.
Sequence Length “32k” (32767) or “128k” (131071).
Frequency Range 10 Hz to 43% of Sample Rate, ±0.1 dB.
Special Signals
Polarity Sum of two sine waves phased for reinforcement
with normal polarity.
Pass Thru Passes the embedded audio signal from the rear
panel Reference Input. Ratio of reference rate to
output Sample Rate may not exceed 8:1.
Chapter 6: Specifications D/A Generated Analog Signals
56 Getting Started with Your 2700 Series Instrument
9
System specification measured with the 2700 series analog analyzer at any voltage ³200 mVrms.
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