1. What's the difference of MTSKR1905WF and MTSKR20WFV2?
2. What is the modulation ? FHSS, FASST, DMRS ? Or the worse dangerous protocol in the EskbWorld, bluetooth...
The MTSKR1905WF and MTSKR20WFV2 remotes use FHSS (FSK/GFSK).
Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly changing the carrier frequency among many distinct frequencies occupying a large spectral band. The changes are controlled by a code known to both transmitter and receiver. FHSS is used to avoid interference, to prevent eavesdropping, and to enable code-devision multiple access (CDMA) communications.
The available frequency band is divided into smaller sub-bands. Signals rapidly change ("hop") their carrier frequencies among the center frequencies of these sub-bands in a predetermined order. Interference at a specific frequency will only affect the signal during a short interval.
FHSS offers three main advantages over a fixed-frequency transmission:
- FHSS signals are highly resistant to narrowband interference because the signal hops to a different frequency band.
- Signals are difficult to intercept if the frequency-hopping pattern is not known.
- FHSS transmissions can share a frequency band with many types of conventional transmissions with minimal mutual interference. FHSS signals add minimal interference to narrowband communications, and vice versa.
3. Is there a second channel available where we can activate lights or aux devices?
Yes, the remote has built-in 2 switches for lights, etc.
Recommend to check blog item 16 and 17 about how to use two switches: FAQ (frequently asked questions) about Maytech V2 remote contoller MTSKR1905WF
4. What is the TX/RX transmission power?
The TX/RX chip is 1mW. With the Maytech standard antenna, the power is 2mW. If customer change other antenna themselves, they need to calculate power accordingly.