How to make walkie talkies reach their optimal usage state

When the communication range of the walkie talkie does not need to be very far (such as fleet communication), try to set the walkie talkie to low power as much as possible to save power, and switch to high power when long-distance communication is needed.

After summary, the communication distance of walkie talkies is influenced by the following factors:

1. The battery level of the walkie talkie;

2. The transmission power of the walkie talkie;

3. Geographical height of connectivity;

4. Electromagnetic environment signal shielding around.

Main performance indicators of walkie talkies:

1. Frequency error: the difference between the unmodulated carrier frequency and the assigned frequency;

2. Output carrier power: The average power given to the transmission line by the transmitting rack within one RF cycle without modulation.

3. Stray RF component: A signal that has a significant component at discrete frequencies or within a narrow frequency band, in addition to modulation components near the carrier and its transmission bandwidth. Including harmonic, non harmonic, and parasitic components.

4. Adjacent channel power: The portion of the total output power of a transmitter operating in a system divided by channels under specified modulation conditions that falls within the specified bandwidth of any adjacent channel.

5. Audio distortion: The ratio of the root mean square value of a distorted sine signal, excluding its fundamental component, to the root mean square value of the entire signal, expressed as a percentage. This distorted sine signal includes harmonic components, power ripple, and non harmonic components.

6. Modulation restriction: The ability of the transmitter audio circuit to prevent modulation from exceeding the maximum allowable offset.

7. Rated audio output power: The power that can be obtained when the output terminal of the receiver is connected to a specified load under specified operating conditions.

8. Reference sensitivity: also known as maximum available sensitivity, it is the input signal level that produces a quasi signal-to-noise ratio (12dBsinad) at the receiving output terminal under specified frequency and modulation.

9. Selectivity: Describes the ability of a receiver to resist unwanted input signals from useful input signals. Evaluate the performance by measuring neighboring signal selectivity, co channel suppression, blocking, spurious response, intermodulation immunity, and other factors.