user:kurser:ham_vt2023_l3
ETA313-03: Theory lesson 2: Electric Circuits
Recommended reading: KonCEPT page 84-144 (chapter 3)
Draw a superheterodyne TRX on the black board. Including antennas and propagation.
Explain from TX to RX
- DAC which stands for Digital to Analog converter.
- Audio BW: 300-3000 Hz
- Pulse shape filter (LP)
- Show other filter symbols
- Mixer → BP filter
- Oscillator
- Amplifier
- Mixer → BP filter
- Oscillator + Frequency multiplier
- Power amplifier (PA)
- Antenna
- Antenna
- Low noise amplifier
- The rest of the superheterodyne receiver
- ADC which stands for Analog to Digital converter
Explain what is heterodyne/homodyne
Direct converting (DDS) radio and direct sampling.
Dictionary
| English | Svenska | Comment |
|---|---|---|
| Bandwidth | Bandbredd | |
| Transmitter | Sändare | |
| Receiver | Mottagare | |
| Transciever | Sändtagare | |
| Mixer | Blandare | |
| Amplifier | Förstärkare | |
| Power Amplifier | Effektförstärkare | |
| Low-noise Amplifier | Lågbrusförstärkare |
user/kurser/ham_vt2023_l3.txt · Last modified: 2025/03/07 18:26 by user