Thanks for the video. Noticed the following on the product page: 1. Has a sweep mode. 2. Either sine or square output up to 2.2 GHz. Only sine above that. 3. No amplitude control. 4. No modulation. But for $39 it seems pretty good. We live in a golden age of cheap Chinese electronics.
4:20 That' because it only goes to 350 MHz on the "LOW INPUT" connector. From the TinySA wiki page: Low input mode spec: Input frequency range from 100kHz to 350MHz High input mode spec: Input frequency range from 240MHz to 960MHz So use the upper connector, and use "MODE" to change to "HIGH INPUT"
It appears that the harmonic content is reported as a delta frequency. For example, 150 MHz fundamental frequency, the 2nd harmonic is 150 MHz delta (displaced) from the fundamental (300 MHz actual).
Generally dependent on the input of the measuring device (in this case a spectrum analyser that seems to have a very conflicting spec relating to maximum input power, 20dBm max, suggested max 5dBm, best measurements -25dBm) or device under test. Good practice to limit the input to no more than 10dBm. Though many have switchable internal attenuators the last thing you want to do is break a spectrum analyser. Tiny SA was showing -14dBm, indicating an approximate transmit power from the generator of -1.4dBm.
I suppose it's useful for working on devices within those frequency ranges but I don't have a clue what's operating there. However that little unit your using to monitor these frequencies on looks interesting. Can you for instance clip it to a cell phone somehow and pickup the output waveform? What about clipping it to various R/C transmitters to observe their output waveforms? We used to use the 27 megahertz band and the 72 megahertz ban for R/C but modern drones for instance are in an entire different part of the RF spectrum.
Thanks for the video. Noticed the following on the product page:
1. Has a sweep mode.
2. Either sine or square output up to 2.2 GHz. Only sine above that.
3. No amplitude control.
4. No modulation.
But for $39 it seems pretty good. We live in a golden age of cheap Chinese electronics.
The 1k 10k 100k are the frequency shifts when you turn the knob.. that's how most work..
4:20 That' because it only goes to 350 MHz on the "LOW INPUT" connector.
From the TinySA wiki page:
Low input mode spec: Input frequency range from 100kHz to 350MHz
High input mode spec: Input frequency range from 240MHz to 960MHz
So use the upper connector, and use "MODE" to change to "HIGH INPUT"
It appears that the harmonic content is reported as a delta frequency. For example, 150 MHz fundamental frequency, the 2nd harmonic is 150 MHz delta (displaced) from the fundamental (300 MHz actual).
Is the numbers shown not the frequency step count, which can be modified by rotating the pot?
Only they use mHz instead of Mhz. :D
That's the rate of change of frequency when you turn the knob to jog up down the frequency.
I dont know if you intended it Paul but that was a great lesson on using the spectrum analyser
Question: Why the attenuator? How do you know when it is needed? How do you know how much attenuation is needed?
My question too! lol
Generally dependent on the input of the measuring device (in this case a spectrum analyser that seems to have a very conflicting spec relating to maximum input power, 20dBm max, suggested max 5dBm, best measurements -25dBm) or device under test. Good practice to limit the input to no more than 10dBm. Though many have switchable internal attenuators the last thing you want to do is break a spectrum analyser. Tiny SA was showing -14dBm, indicating an approximate transmit power from the generator of -1.4dBm.
So, can you add an audio to it (mic)? As in radio-station?
Can u post the link of the attenuator board? Thanks.
If you feel like sending it to New Zealand I would love to have one.
When you were entering the upper frequency, it appeared that you were entering 15mhz instead 155mhz.
I suppose it's useful for working on devices within those frequency ranges but I don't have a clue what's operating there.
However that little unit your using to monitor these frequencies on looks interesting.
Can you for instance clip it to a cell phone somehow and pickup the output waveform?
What about clipping it to various R/C transmitters to observe their output waveforms?
We used to use the 27 megahertz band and the 72 megahertz ban for R/C but modern drones for instance are in an entire different part of the RF spectrum.
baker? It's bravo :P