The Interphone Has The Following Major Performance Indicators

Mar. 19, 2019 I want to consult

The interphone such as Marine Walkie Talkie Has The Following Major Performance Indicators:

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: in addition to the modulation component near the carrier and its transmitting bandwidth, there is a significant component of the signal in the discrete frequency or narrow band. Including harmonic and non-harmonic and parasitic components.

4) adjacent channel power: the portion of the total output power of a transmitter operating in a channed-by-channel system that falls within the specified bandwidth of any adjacent channel under specified modulation conditions.

Marine Walkie Talkie

5) audio distortion: the ratio of the root mean square value of the distorted sinusoidal signal to the total root mean square value of the signal, expressed as a percentage, excluding the fundamental component. The distorted sinusoidal signal includes harmonic components, power supply ripple and non-harmonic components.

6) modulation limits: the ability of the transmitter's 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 end of the receiver is connected with the specified load under the specified operating conditions.

8) reference sensitivity: also known as the maximum usable sensitivity, the input signal level of 12Dbsinad is generated at the receiving output end under the specified frequency and modulation.

9) selectivity: represents the ability of useful input signals of the receiver to resist useless input signals. The performances of neighborhood signal selectivity, common channel suppression, blocking, spurious response and mutual modulation immunity were evaluated.

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