TAMPEREEN TEKNILLINEN YLIOPISTO
TAMPERE UNIVERSITY OF TECHNOLOGY
TLT-5500, TLT-5506
83950
Telecommunication Laboratory Course
Receiver work
E-mail:
Room: TG208/ Ismo Viitaniemi
Lab:TG205
1. PRE-LAB ASSGINMENT
1.1 In your report, you should present the general theory about the design of RF- and IF-parts in a receiver and go through the design procedure you followed to build the receiver in your lab. You should justify the choice of each component you chose. You should also append your calculations and results.
From the shelf in the room B427, you can find the folder, which contains the most important documents (for example selected parts from the references) related to the lab. Another good source is Markku Renfors lecture notes. Also "Mikroaaltomittaustekniikka" and "Radiotekniikka" by Lehto/Räisänen are very helpful. Other useful references are Ulrich Rohden: "Communications Receivers". And Robert C. Dixon: "Radio Receiver Design".
You can find the data related to the components in Mini Circuit book. In the lab-folder (mentioned above) you can find (among other things) data related to the filters.
In this lab you can use the following components:
Amplifier Mini Circuit ZFL-1000
Mini Circuit ZEL-0812LN
Mini Circuit ZJL-4HG
Mixer
Mini Circuit ZFM-12
Mini Circuit ZAD-4
Mini Circuit ZP-5
Hewlett&Packard 10514A
Filter
Mini Circuit SIF-70
Mini Circuit SBP_10.7 K & L 71 MHz/0.2
Muratan duplex-filter
Different RX-filters (3)
(Or equivalent components, AT&T test cards).
1.2 You should also plan your measurements in advance and present it in your pre-lab assignment. So get familiar with the receivers in general and present the typical measurements performed in a receiver.
1.3 In our design, we want to achieve:
Sensititity -90 dBm
NF< 10 dB
IIP3> -15dBm
G( 76 dB
Selectivity; spurious responses should be < -100 dBm
2. THE MEASUREMENTS
The measurements are performed by HP network analyzer 8714C, which operates at the frequency range of 300 kHz-3 GHz. Additionally, we will use the Spectral analyzer HP8594E (at least as far as noise figures are concerned). Also we need SMY 02 signal generators (or something equivalent) to generate test- and LO-signals and LO-signals.
It is important to note that in the real receiver measurements (for example in the receiver sensitivity measurement) we always have a demodulator, (in other words carrier frequency analyzer) so the real performance capability of the receiver can not be measured here. In digital receivers, this would require BER-measurement using different test signals in the presence of different interfering signals. We can however estimate sensitivity, for instance, based on the measurements.
As you go through the lab, you will find out more about the details of the measurements.
2.1 Measure the 1-dB compression point of the receiver, its noise figure and its amplification. (So after the IF amplification).
2.3 Selectivity; spurious responses
3. POST-LAB ASSIGNMENT
3.1 Present the results of your measurements, compare them to the theoretical values (what you calculated) and explain why they are different. Excel table should be included.
REFERENCES
1. A. Lehto, A. Räisänen: MIKROAALTOMITTAUSTEKNIIKKA
2. Pekka Eskelinen: NYKYAIKAISEN RADIOTEKNIIKAN MITTAUKSET KÄYTÄNNÖSSÄ
3. A. Räisänen, A. Lehto: Radiotekniikka
4. Hewlett & Packard: BACK TO BASICS
5. Ulrich Rohde: Communications Receivers
6. Mini-Circuits: RF / IF DESIGNER´S HANDBOOK
7. WORK INSTRUCTION FOLDER