Atec Agilent-U8903A - Manual (Page 13)

13
Specifications (continued)
Figure 12. “A”weighting filter frequency response Figure 13. CCIR-2K weighting filter
Figure 14. CCIR-1K filter and CCIR-2K filter frequency response Figure 15. CCITT filter frequency response
“A” weighting filter frequency response
Response (dB)
Frequency (Hz)
“A” Weighting Filter (ANSI-IEC “A” weighted, per IEC Rec. 179)
Deviation from ideal response:
±0.1 dB at 1 kHz
±0.5 dB, 20 Hz to 10 kHz
±1.0 dB, at 10 to 20 kHz
“A” weighting filter
Response (dB)
Frequency (Hz)
CCIR-2K weighting filter (Dolby 2K)
Deviation from ideal response: same as listed
previously under CCIR-1K weighting filter
C-Message
C-Message weighting filter (C-Message per IEEE 743)
Deviation from ideal response:
±0.1 dB, at 1 kHz
±1.0 dB, 60 Hz to 5 kHz
Response (dB) Response (dB)
CCIR-1K filter and CCIR-2K filter frequency response CCITT filter frequency response
Frequency (Hz) Frequency (Hz)
CCIR-1K filter
CCIR-2K filter
CCIR-1K weighting filter (CCIR Rec. 468)
Deviation from ideal response:
±0.1 dB, at 6.3 kHz
±0.2 dB, at 6.3 to 7.1 kHz
±0.4 dB, at 7.1 to 10 kHz
±0.5 dB, at 200 Hz to 6.3 kHz
±1.0 dB, at 31.5 to 200 kHz, 10 to 20 kHz
±2.0 dB, at 20 to 31.5 kHz
CCITT
CCITT message weighting filter (ITU-T Rec. 0.41, ITU-T Rec. P.53)
Deviation from ideal response:
±0.2 dB, at 800 Hz
±1.0 dB, at 300 Hz to 3 kHz
±2.0 dB, at 50 Hz to 3.5 kHz
±3.0 dB, at 3.5 to 5 kHz