Random (Bittest) Pseudo-random binary states of all bits.
Pass Thru Passes the signal from the rear panel Ref Input.
Accepts sample rates from 27 kHz–200 kHz and
outputs at programmed sample rate. Ratio of
rates may not exceed 7.75:1.
Quasi-Anechoic Acoustical Tester (MLS)
(Also see MLS in Digital Analyzer section, page 84)
Signals Four pink sequences, four white sequences.
Frequency Range dc to Sample Rate ¸ 2.
Sequence Length 32767 samples or 131071 samples.
Arbitrary and Multitone Waveforms (“Arb Wfm”)
Stored waveform consisting of multiple sine waves, each at independent frequency,
amplitude, and phase
Signal Determined by the associated file specified in the
panel drop-down box.
Frequency Range dc to Sample Rate ¸ 2.
Length 256 points–16384 points per channel. Utility is
provided to prepare waveform from user specified
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].
Dither
(May be enabled for all waveforms except Monotonicity, J-Test, Walking Ones and Zeroes,
and Random)
Probability Distribution Triangular or rectangular; pseudo random,
independent for each channel.
Spectral Distribution Flat (white) or Shaped (+6 dB/oct).
Amplitude 8 bit–24 bit, or OFF.
Pre-Emphasis Filters
(all waveforms)
Filter Shape 50/15 µs or J17.
Response Accuracy ±0.02 dB, 10 Hz to 45% of Sample Rate.
Residual Distortion £0.00003% [–130 dB].
Digital Signal Generator Chapter 6: Specifications
Getting Started with Your 2700 Series Instrument 79
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