Canal de EA2CTK
Loading...
4
subscribers
2,557
video views
Uploaded videos
1-10 of 16-
FM transmission subsystem at 455 kHz
EA2CTK
23 views
Stage 1 of project: Testing a pair of PLL (4046) for FM modulation / demodulation subsystem at 455 kHz: VCO frequency vs VDD, R,C..., lock range and tracking range of xor c...
-
PLL Test preenphasis & deenphasis
EA2CTK
23 views
Here I'm testing selfmade Wideband PLL UHF Synthesizer (and having lot if fun!! xDD)
1.- quality of modulation with 50µseg preenphasis and deemphasis (Apropiate music wi...
-
PLL FM modulator fast lock over 500 MHz
EA2CTK
30 views
Here another test with my PLL making "frequency hopping" between 400 - 900 MHz (SEE THE MARKERS !!!), remember that fcmin for modulation is around 35 Hz...
I made an automa...
-
High Fidelity superior performance UHF FM 5th Order PLL Modulator with very fast locking time.
EA2CTK
62 views
Here, testing own made High Fidelity FM PLL modulator with superior performance, 40Hz-40kHz, SNR (without preenphasis 49 dB), Worst case lock time 250 mseg over 500 MHz.
...
-
Multi USB I/O Tests under Linux
EA2CTK
19 views
another tests, analog inputs under linux
-
Own made USB I/O multi-interface test
EA2CTK
51 views
First test with my own made analog I/O USB interface, new product coming soon !!
-
3 resonnators UHF tunable bandpass filter
EA2CTK
61 views
Here my 2nd version of UHF tunable bandpass filter with lumped elements. fo 790-690 MHz, in this version I added third resonator. I try to minimize the insertion loss but i...
-
20 dB Linearity improvement of RF Mixer with analog predistortion
EA2CTK
104 views
A 20dB Intermodulation distortion cancellation in RF mixer with analog conjugate gradient circuit, FI 45 MHz, RF = 600 MHz, LO = 645 MHz, GaAsFet mixer CF739. See IMD impro...
-
UHF Tunable Band pass filter
EA2CTK
203 views
2nd prototype of tunable band pass filter. Specs:
fo 450-575 MHz
Bw 16 MHz
In this case we see that filter is ligthly under coupled, just I must increase the coupling fac...
-
UHF Frequency synthesizer V: EMC problem in PLL
EA2CTK
395 views
Here I show an electromagnetic compatibility problem in layout due to wrong RF decoupling. Look RED LED Lock indicator that shows when PLL is out of phase lock (when is off...
Play all(16)