參數(shù)資料
型號(hào): PEF24911
英文描述: ISDN Line Interface
中文描述: ISDN線路接口
文件頁(yè)數(shù): 28/73頁(yè)
文件大?。?/td> 1618K
代理商: PEF24911
PEB 2466
PEF 2466
Operational Description
Hardware Reference Manual
19
2001-02-20
4.2.8.2
Group Delay Distortion with Frequency
The Group Delay Distortion in transmit and receive direction will stay within the limits
shown in
Table 11
. Group Delay Distortion values are referenced to the minimum value
of Group Delay (T
G
min).
Table 11
Group Delay Distortion with Frequency
4.2.9
Noise
Table 12
Idle Channel Noise in Transmit Direction
Table 13
Idle Channel Noise in Receive Direction
Frequency
Symbol
Limit Values
min.
typ.
Unit
Test Conditions
max.
300
150
100
300
500 Hz to 600 Hz
600 Hz to 1.0 kHz
1.0 kHz to 2.6 kHz
2.6 kHz to 3.0 kHz
t
G
t
G
t
G
t
G
μs
μs
μs
μs
0 dBm0 input signal level,
reference point is at T
G
min.
Parameter
Symbol
Limit Values
typ.
Unit
min.
max.
67.4
17.5
17.5
A-Law, psophometric (
V
IN
= 0 V)
μ-Law, C-message (
V
IN
= 0 V)
μ-Law, C-message (
V
IN
= 0 V)
N
TP
N
TC
N
TC
dBm0p
dBmc
dBrnC0
Parameter
Symbol
Limit Values
typ.
85
5
5
Unit
min.
max.
78.0
12.0
12.0
A-Law, psophometric (idle code + 0)
μ-Law, C-message (idle code + 0)
μ-Law, C-message (idle code + 0)
N
RP
N
RC
N
RC
dBm0p
dBmc
dBrnC0
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