PSB 2134 H V2.2 Infineon Technologies, PSB 2134 H V2.2 Datasheet - Page 77

• Manufacturer Part Number: PSB 2134 H V2.2
• Description: IC CODEC FILTER 4CHAN MQFP-64
• Manufacturer: Infineon Technologies
• Series: SICOFI®r

Specifications of PSB 2134 H V2.2

• Function: CODEC Filter
• Interface: IOM-2 PCM, SPI
• Number Of Circuits: 4
• Voltage - Supply: 5V
• Current - Supply: 26mA
• Power (watts): 130mW
• Mounting Type: Surface Mount
• Package / Case: 64-QFP
• Includes: Level Metering Function, Tone Generation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Other names: PSB2134HV2.2X; SP000007389; SP000007390

The attenuation and amplification filters of the SICOFI2/4-TE can be used to amplify or
attenuate the level of the tone generator 1. With disabled filters the tone generator 1
sends a level of -4.5 dBm0.
In order to avoid test signal attenuation by the balancing filter TH, it has to be disabled.
It is necesarry to switch off the voice in the respective channel during level metering with
V+T bit of CR2.
No external components are required to use the Level Metering Function with the built-in
tone generators. This can be very helpful in digital exchange systems. It is a task of the
exchange software to switch from time to time the tone generators on and to measure
the level via the Level Metering Function. So the actual state of all SICOFI2/4-TE
channels and connected circuitry can be supervised very comfortably.
8.7
For development of a new application the PCM4 by Wandel and Goltermann can also
be very helpful to send and receive test signals. Please make sure that the configuration
of the PCM4 corresponds to the SICOFI2/4-TE configuration, for instance that the same
companding law is used.
Figure 36 shows a test configuration with a PCM4 device.
Figure 33
Test signal for level metering provided by PCM4
For a digital exchange system it is possible to use a PCM4 as a test signal generator as
well as a test signal receiver. To do this, the PCM4 has to be connected to a PCM
highway and the exchange has to switch the test information from the PCM4 to the
respective SICOFI2/4-TE and back.
By using a PCM4 the expenditure for level metering measurement, level evaluating and
preparation for software processing is higher and already done in the level metering
block of the SICOFI2/4-TE. That is why the Level Metering Function is more helpful in
digital exchange systems than a PCM4.
8.8
For test purposes an analog test signal can be applied to the SICOFI2/4-TE analog input.
Figure 37 shows such a configuration.
Semiconductor Group
Analog
Telephone
Set
PCM4
Analog Test Source
Z
T
Subscriber
Line
Z
L
.
SLIC
77
Z
SLIC
Application Note: Level Metering
C
C
Level Metering
Function
SICOFI2/4-TE
Test Signal
PCM4
PSB 2132
PSB 2134
09.97