TUA6039 Infineon Technologies Corporation, TUA6039 Datasheet - Page 13

• Manufacturer Part Number: TUA6039
• Description: Stationary - Mopll & Silicon Tuner
• Manufacturer: Infineon Technologies Corporation

or half NIM with TUA6039, which are described as follows:
1.
characteristic of the tuner can be measured. This will need the testing probe to be connected to the
internal test pin of the tuner/half NIM while damping resistor to be added to the IF filter to show the real
RF curve;
2.
without implementation of the internal test pin or requirement of the damping resistor at the IF filter. The
measurement equipment, i.e. Spectrum analyzer or network analyzer can be directly connected to the
tuner/half NIM IF output via a BALUN to perform the measurement and alignment. In order to monitor the
RF characteristic, the Loop_Through is to be set to “enable” via IIC. The internal diagram to illustrate the
operation of Loop_Through function is shown as follows:
When the Loop_Through function is enabled, the Signal at the MIXER_OUT will be brought directly to the
IF output via IF Amplifier. It would bypass the IF filter, SAW_Driver and the SAW filter so that the real RF
characteristic/curve can be shown at the IF output. This would simplify the alignment procedure and the
design of a testing jig for alignment.
There are two methods to connect the tuner/half NIM output when doing alignment for the tuner
Traditional method connects the output at the SAW_OUT of the TUA6039 so that the RF
Due to the new Loop_Through function of TUA6039, tuner/half NIM alignment can also be done
Application Notes Revision 3.0
Application Engineering
12
Communication Solutions
IFAP COM Tuner Systems
May 2007