PEB2465 SIEMENS [Siemens Semiconductor Group], PEB2465 Datasheet - Page 50

• Manufacturer Part Number: PEB2465
• Description: Four Channel Codec Filter
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
8
The proper adjustment of the programmable filters (transhybrid balancing, impedance
matching, frequency-response correction) needs a complete knowledge of the
SICOFI-4’s analog environment, and it is suggested to use the QSICOS-program for
calculating the propriate coefficients. Unless otherwise stated, the transmission
characteristics are guaranteed within the test conditions.
Test Conditions
T
R
H(IM) = H(TH) = 0; H(R1) = H(FRX) = H(FRR) = 1;
HPR and HPX enabled;
AR
A
f
AGX = 0 dB, 6.02 dB, AGR = 0 dB,
In Transmit direction for
automatically, in the companding block (CMP). This additional gain has to be considered
at all gain calculations, and reduces possible AX-gain.
A 0 dBm0
equivalent to 1.57 Vrms which corresponds to the overload point of 2.223 V
(A-law,[ -law]).
When the gain in the receive path is set at 0 dB, an 1014 Hz PCM sinewave input with
a level 0 dBm0 will correspond to a voltage of 1.095 Vrms at A-Law (1.0906 V -Law) at
the analog output.
When the gain in the transmit path is set at 0 dB, an 1014 Hz sine wave signal with a
voltage of 1.095 Vrms A-Law (1.0906 V -Law) will correspond to a level of 0 dBm0 at
the PCM output.
1)
2)
3)
4)
= 1014 Hz; 0 dBm0; A-Law or -Law;
A
L
X
1)
R
Consider, in a complete System, AR = AR1 + AR2 + FRR + R1
Consider, in a complete System, AX = AX1 + AX2 + FRX
The absolute power level in decibels referred to the PCM interface levels.
3)
= 0 C to 70 C;
2)
L
> 20 k ;
,
= 0 to 13 dB for sine-wave-, and
= 0 to
C
L
0 to
0 to 11 dB for CCITT-noise-measurements
forms the load on
Transmission Characteristics
4
4)
)
13 dB for sine-wave-, and
11 dB for CCITT-noise-measurements
C
signal is equivalent to 1.095 [1.0906] Vrms. A + 3.14 [3.17] dBm0 signal is
L
< 20 pF;
V
DD
V
OUT
= 5 V 5%; GNDA1
-law an additional gain of 1.94 dB is implemented
6.02 dB;
50
4 = GNDD = 0 V;
Transmission Characteristics
PEB 2465
02.97