Does the communication cable loop have 6 ohm resistance that affects communication?
Analog and digital single point grounding. 10. cross connection is used in the current loop. When the ground plane is separated, the shortest return path is broken. At this point, the signal loop has to bypass to form a large loop area, and the influence of electric and magnetic fields becomes stronger, which is easily disturbed / disturbed. A 0 ohm resistance across the split section can provide a shorter recirculation path to minimize interference. 11. configure the circuit, the general product does not appear jumper and dial code switch. Sometimes users will tamper with settings, easily lead to misunderstanding, in order to reduce maintenance costs, the use of 0 ohm resistors instead of jumpers and other welding on the board. The vacant jumper is equivalent to the antenna at high frequencies and is good with patch resistors.
Act as an inductor or capacitor under high frequency signals. (with respect to the characteristics of external circuits) inductance is used primarily to solve the EMC problem. Such as ground and ground, power supply and IC Pin. 7. single point earthing (i.e. protection earthing, work grounding, DC earthing, separating from each other on the equipment, each becomes independent system) 8. fuse action.
There is no function in the circuit, just for the sake of debugging convenience or compatibility design on the PCB. 2. can do jumper, if a section of the line does not use, directly paste the resistance can (without affecting the appearance). 3., when the parameters of the matching circuit are uncertain, replace with 0 ohms, and then adjust the parameters at the time of actual debugging, and then replace the components with specific numerical values. 4., to measure the current consumption of a part of the circuit, you can remove the 0ohm resistor, connected to the ammeter, so that it is convenient to measure the current consumption. 5., in wiring, if the cloth does not pass, you can also add a 0 ohm resistance.
