4g cell phone jammer Currently, based on the principle of radio frequency wireless communications products found everywhere, their number is very alarming growth rate. From cellular phones and wireless PDA, to support WiFi laptop, Bluetooth headset market size, RF ID tags, Zigbee wireless medical devices and sensors, radio frequency devices in the rapidly expanding. To conduct a comprehensive production testing and improve testing capacity, test engineers must understand the choice of the most appropriate instrument to complete these tests. So, how to select the RF test instruments it?
First, select the radio frequency signal source 4g cell phone jammer
All of the RF signal source can produce a continuous (CW) radio frequency sine wave signal. Some signal generator can generate analog modulated RF signal (such as AM radio signal or pulse signal), vector signal generator uses IQ modulator produces a variety of analog or digital modulation signals.
RF signal source can be further divided into many kinds, including fixed frequency CW sine wave output source, scan output a non-fixed frequency band CW sine wave sweep source, analog signal generator and an increase in both analog and digital modulation vector signal generator.
If the test requires excitation signal, then you need the RF signal source. Key indicators is the frequency of the RF signal source with amplitude range, accuracy and amplitude modulation quality (signal source for generating a modulated signal in terms). Frequency tuning speed and amplitude settling time for reducing test time is very critical. 4g cell phone jammer
Vector Signal Generator is a high performance signal source, usually some combination of arbitrary waveform generator generates a modulated signal together. The arbitrary waveform generator by the vector signal generator can be any type of analog or digital modulation signal. This generator can produce a variety of waveforms within the baseband, and in some cases, also be generated externally of a baseband waveform is then loaded into the instrument. If the test specification requires that the measured component, equipment or system under test equipment according to end-use processing modulation for testing, so in this case usually requires the use of a vector signal generator. 4g cell phone jammer
If the test specifications required for receiver sensitivity testing, bit error rate testing, adjacent channel rejection, two-tone intermodulation suppression, or two-tone intermodulation distortion test, then we need to use the RF signal source. Two-tone intermodulation test and adjacent channel suppression test requires two signal source, receiver sensitivity test and / or bit error rate test only requires the use of a radio frequency signal source. 4g cell phone jammer
If the test device is a mobile phone, then the test may be tested modulates the signal type mobile phone according to the standard requirements. Mobile phone power amplifier requires a combination of the modulation signal source (such as a vector signal generator) for testing. Before choosing a vector signal generator, the signal generator to evaluate the switching speed between different modulation signal to ensure that it can provide the fastest test time.
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