PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 65

• Manufacturer Part Number: PEB3265
• Description: (PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
• Manufacturer: Infineon Technologies Corporation

Preliminary
Table 7
Table 7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Data Sheet
Characteristic
Valid input signal detection level
Input signal rejection level
Positive twist accept
Negative twist accept
Frequency deviation accept
Frequency deviation reject
DTMF noise tolerance
(could be the same as 14)
Minimum tone accept duration
Maximum tone reject duration
Signaling velocity
Minimum inter-digit pause duration 40 ms
Maximum tone drop-out duration
Interference rejection
30 Hz to 480 Hz for valid DTMF
recognition
Gaussian noise influence
Signal level – 22 dBm0,
SNR = 23 dB
Pulse noise influence
Impulse noise tape 201 according
to Bellcore TR-TSY-000762
shows the performance characteristics of the DTMF decoder algorithm:
Performance Characteristics of the DTMF Decoder Algorithm
65
Value
– 48 to 0 dBm0
– 5 dB of valid signal
detection level
< 8 dB
< 8 dB
< ± (1.5% + 4 Hz) and
< ± 1.8%
> ± 3%
– 12 dB
40 ms
25 ms
20 ms
Level in frequency
range 30 Hz … 480 Hz
frequency + 22 dB
Error rate better than
1 in 10000
Error rate better than
14 in 10000
93 ms/digit
level of DTMF
Functional Description
Notes
Programmable
–
Programmable
Programmable
Related to center
frequency
Related to center
frequency
dB referenced to
lowest amplitude
tone
–
–
–
–
–
dB referenced to
lowest amplitude
tone
–
measured with
DTMF level
– 22 dBm0
Impulse Noise
– 10 dBm0 and
– 12 dBm0
2000-07-14
DuSLIC