Mesurer sa chaîne d'émission
To dispel doubts about power levels, it is useful to equip yourself with a milliwattmeter. It will allow you to check your emissions levels at different points in your emission chain and ensure that you do not apply excessive levels to downstream equipment.
There are also products available on the Chinese market:
An ImmersionRC wattmeter designed for power measurements of transmitters for models (aircraft, drones) (Link to Aliexpress)
- Power level: -20dBm up to + 30dBm with 30 dBm attenuator included. Runs on rechargeable battery
- Not personally tested
- A “powermeter”, milliwattmeter based on RF detector AD8318 from -55 to -5 dBm (Link to Aliexpress)
A spectrum analyzer can also be used to measure levels and check the spectral “purity” of your transmitters. Always be careful that you do not apply a higher level that is acceptable to your analyzer. An analyser with tracking (generator), combined with a directional coupler, will also allow you to determine the return loss of an antenna. For amateurs, I suggest you watch this video explaining the measurement method. Resources (in french) are also available on the REF 68 website.
I suggest you to discover this ultra portable spectrum analyzer LTDZ 35-4400M connectable to a Windows™ computer , and to use with its software (To download WinNWT).. This is the Link to Bangood and Ebay.