(1) Working frequency band. The receiver works with the transmitter. For a hop, the transmission frequency of the previous microwave station is the receiving frequency of the same channel of the receiver, and the frequency band uses the same transmitter.
(2) The frequency stability of the local oscillator. The requirements for the frequency stability of the receiving local oscillator are basically the same as those of the transmitter. Usually around 3 to 10 ppm .
(3) Noise figure. Digital microwave receiver noise factor is generally 2.5 ~ 5dB, less than about 5dB analog microwave noise figure of the receiver.
(4) Passband. In order to effectively suppress interference and obtain optimal signal transmission, the amplitude and frequency characteristics of the appropriate passband and passband should be selected. The passband characteristics of the receiver are mainly determined by the intermediate frequency filter. Generally, the passband of the digital microwave device can take 1 to 2 times the transmission symbol rate.
(5) Selectivity. In order to ensure that the receiver only receives the local channel signal, it is required to have strong suppression capability for various signal interferences other than the passband, in particular, to suppress interference between adjacent channel interference, image interference, and local transmission and reception.
(6) Automatic gain control range. Based on the reception level under free-space transmission conditions, when the reception level is higher than the reference level, it is called upper fading; when it is lower than the reference level, it is called lower fading. The upper fading of the digital microwave is assumed to be +5 dB , the lower fading is 40 dB , and the dynamic range is 45 dB . The requirement for automatic gain control is that the receiver's rated output level does not change when the reception level changes within this range.
·Basic precautions
Do not put expensive oil into low-quality cartridges to avoid wastage. Most pre-filled oil cartridges have the so-called 510 thread. The oil cartridge screws onto a rechargeable battery. Some of these batteries have buttons and some heat up automatically when you pump the oil. Some batteries have multiple temperature settings and some heat up to a preset temperature; these features need to be known in advance.
·Cleaning notes
Use a suitable cleaning tool to clean them, such as activated charcoal or dried tea leaves in a used pipe to absorb the oil. It is important not to use alcohol or other boiling water to clean the pipe, and to wait until it has cooled down completely before cleaning. Otherwise, the hot stem will come into contact with the watery liquid and cause the mouthpiece tenon to loosen, thus shortening the life of the 510 cartridges.
This is what you should be aware of when using 510 cartridges. At the same time, when using 510 cartridges, there are still some vaping tips, for example, when using them, be careful not to suck too hard, will not produce smoke. When you inhale too hard, the smoke is sucked directly into your mouth and not atomized by the atomizer, so gently inhaling is more powerful and gives you a better vaping experience.
510 Cartridge Oem,Leakproof 510 Cartridge,510 Battery And Cartridges Oem,510 Cartridge
Shenzhen MASON VAP Technology Co., Ltd. , https://www.cbdvapefactory.com