High pass Filters <10 Hz (4-pole),
22 Hz (4-pole),
100 Hz (4-pole),
400 Hz (4-pole Butterworth, or 10-pole elliptic if
no other filters are enabled).
Low pass Filters f
S
/2 (maximum bandwidth),
20 kHz (6-pole elliptic),
15 kHz (6-pole elliptic).
Weighting Filters ANSI-IEC “A” weighting, per IEC Rec 179,
CCIR QPk per CCIR Rec. 468,
CCIR RMS per AES17,
C-message per IEEE Std 743-1978,
CCITT per CCITT Rec. O.41,
“F” weighting corresponding to 15 phon loudness
contour, –see Figure 58, page 72
HI-2 Harmonic weighting.
Residual Noise –141 dBFS unweighted,
(at 48 ks/s and 96 ks/s f
s
) –144 dBFS A-weighted,
–140 dBFS CCIR RMS,
–130 dBFS CCIR QPk,
–142 dBFS 20 kHz LP,
–143 dBFS 15 kHz LP,
–139 dBFS “F” weighting,
–152 dBFS CCITT,
–151 dBFS C Message.
Narrow Band Amplitude
Frequency Range 10 Hz to 40% of Sample Rate,
[10 Hz–17.6 kHz at 44.1 ks/s],
[10 Hz–19.2 kHz at 48 ks/s],
[10 Hz–38.4 kHz at 96 ks/s].
Filter Shape 10-pole, Q=19 (BW = 5.3% of f
o
).
–see Figure 59, page 72
Residual Distortion £–150 dBFS.
THD+N Measurements
Frequency Range <10 Hz to 47% of Sample Rate,
[10 Hz–19.9 kHz at 44.1 ks/s],
[10 Hz–21.6 kHz at 48 ks/s],
[10 Hz–43.2 kHz at 96 ks/s].
Residual THD+N £–138 dBFS. –see Figure 61, page 85
High pass Filters <10 Hz (4-pole),
22 Hz (4-pole),
100 Hz (4-pole),
400 Hz (4-pole Butterworth).
Low pass Filters F
S
/2 (maximum bandwidth),
20 kHz (6-pole elliptic),
15 kHz (6-pole elliptic).
Weighting Filters Same as Wideband Level/Amplitude.
Residual Noise Same as Wideband Level/Amplitude.
Frequency Measurements
Range
10 Hz to 47% of Sample Rate,
[10 Hz–21.0 kHz at 44.1 ks/s],
[10 Hz–23.0 kHz at 48 ks/s],
[10 Hz–46.0 kHz at 96 ks/s].
Chapter 6: Specifications Digital Analyzer
82 Getting Started with Your 2700 Series Instrument
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