Mokxihit RF Signal Generator 35MHz 4400MHz
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- Опубліковано 8 бер 2023
- Mokxihit RF Signal Generator 35MHz 4400MHz
www.pcbway.com/ Get 5 boards in about a week for $27!
Mokxihit RF Signal Generator- amzn.to/3kRpGCF
★ Supply voltage: DC 4.5V-5.5V, USB
★ Standby current: 25mA
★ Emission current: 150mA
★ Output impedance: 50 ohms
★ Output Connector: SMA-K
★ Output frequency range: 35MHz-4400MHz
★ Output stepping: 1KHz-8KHz
★ Output power: -1dBm (W) @ 150MHZ (test power absolute value) about 1 mW
Features:
★ Simple RF signal source signal generator
★ This product operation keyboard has 15 ppt keys, 0~9 number keys, 10, "++" and "--" keys to adjust the frequency to use,
also produces emission output behavior,
short press "++" or "-- ” Key stepping adds one step or minus one step to the original frequency output.
The “ok” button is the output control button. Press it to launch. Press again to stop the transmission.
The emission behavior caused by “++” or “--” needs to press “OK” twice to end the transmission.
This product will display “” in the upper right corner of the display when there is output emission behavior
The “C” key will end the transmission and the frequency will be zero.
★ Stepping "" key, cycle selection step "1K", "10K", "100K", "1M"
★ The new bottom layer LCD1602 power-up defaults to the "1k" stepping indication by pressing the "" button
There are four types of stepping states that can be cycled.
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Gear I use:
Multimeter: OWON B33+ amzn.to/3UkTJOo
Oscilloscope: KIPRIM DS1202 amzn.to/3gfJGMN
Signal generator: Junctek JDS8080 shorturl.at/ehTZ1
Component Tester: T7 Multifunction amzn.to/3AYY03v
Soldering Station: Sealody ??????? - Наука та технологія
The 1k 10k 100k are the frequency shifts when you turn the knob.. that's how most work..
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).
So, can you add an audio to it (mic)? As in radio-station?
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
Can u post the link of the attenuator board? Thanks.
That's the rate of change of frequency when you turn the knob to jog up down the frequency.
If you feel like sending it to New Zealand I would love to have one.
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.
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.
When you were entering the upper frequency, it appeared that you were entering 15mhz instead 155mhz.
I dont know if you intended it Paul but that was a great lesson on using the spectrum analyser
baker? It's bravo :P
Able Baker Charlie is the beginning of the precursor "CCB" alphabet used by the allies in the later years of WW2 until the korean war