This kind of cell phone jammer was made of good thermo stability

You should also check various aspects of CATV shielding situation, plus access the device or filter noise cancellation circuit. Especially in the front entrance of the protection circuit antenna ground must be * good. If it is horizontal, "the word" or S-shaped and irregular mesh interference fringes interference, it may be harmonic FM radio interference, should limit the FM signal level, plus access band-pass filter, and from the FM signal frequency configuration, frequency stability, modulation, gain equalization and other parameters adjusted to start to solve. If the local oscillator radiation caused by intermodulation interference, as long as the selection of high isolation splitter or distributor will be able to receive a good anti-interference effect.The emission power of     cell phone jammer   is 1W for every antenna. If there is light and dense twill and with the sound of the strength of the shaking, which is the next adjacent channel interference, should be excluded from active devices within the system of nonlinear distortion (such as the amplification module damage, amplifier gain is too high, etc.) , so that adjacent channel power adjustment should be less than or equal to 2dB to 17dB ≤ V / A ≤ 20dB. Also in order to avoid intermodulation interference in the network at all levels should be considered when designing the amplifier input gain amplifier nonlinear distortion can not be leaving because of the channel mixer; maximize intermodulation ratio; reasonable set channels to avoid and do not compatible with the emergence of channels and so on.    cell phone jammer    is the environment-friendly product and does no harm human bodies. For the crosstalk levels should focus on examination of the amplifier gain, or to detect the amplitude-frequency characteristics, the investigation of nonlinear distortion analysis of active components cause, by adjusting the parameters to set reasonable and replacement generation device to solve the nonlinear distortion such interference. (5) CATV system interference hum modulation is also more common form of interference. The system of indicators that signal hum than HM = 20lg (reference modulation / hum modulation of the peak - peak) (dB) * (carrier hum ratio).This kind of cell phone jammer was made of good thermo stability. Many of CATV system equipment powered by the AC to DC, if the rectifier filter circuit failure, it is easy to hum mixed signals. Normal trunk coaxial cable are mostly the same AC power cable and high-frequency signal transmission, if the design or improper construction, the ends of lines to end with a large potential difference, the sound will be mixed with high-frequency AC signals, this exchange If only high-frequency sound signals with superimposed together, yet not affect the image quality, because the levels have their own filter and amplifier decoupling circuit, can filter out the hum signal. If the amplifier is working in the nonlinear regions, the amplifier module, such as partial failure, failure of negative feedback circuit, amplifier overload run (often encountered such a failure), high-frequency signals will be hum modulation, frequency modulation that is signal can not be filtered by the low-frequency filter. This interference makes the image appear to move up and down the horizontal stripes (50Hz hum interference so that the screen appears with a dark horizontal scrolling, 100Hz hum interference appeared in two horizontal dark band). Hum of the fundamental (50Hz) and the vertical sync signal frequency difference large, striped roll soon; frequency difference is small, striped roll it slow.The good   cell phone jammer company is complete in organization structure with specific researches and development force or specific technical commission personnel to effectively guarantee the product quality.  To improve the carrier frequency hum than to prevent such interference, you must drive, modulator and other non-linear conversion circuit and other circuits before the DC power supply to ensure ripple coefficient allows for all levels of the amplifier requires no more than limit output level, so that the amplifier operates in the linear amplification region.