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Shielded cabinet
by：TNE
2021-03-30
Shielded cabinet frame for four fixed in the cabinet inside wall, light side frame is installed on the four pillars frame, window on the window, the waveguide were set up on the roof, tank bottom, have door cabinets, quads equipped with spring piece, the door on the door frame with four edges of the sword, shielding shielding door cabinet has a positive perspective.
Can be used to place computers, servers, to be able to put an end to the electromagnetic wave of personal injuries, effective inhibition of computer electromagnetic information leakage and prevent external strong electromagnetic disturbance affect the normal work of the computer, suitable for wide frequency band, meet the national standard B level or C level and the requirements of the standard class B.
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shielded cabinet the proper use of the
;
it is not hard to see through the above analysis, to make the shield cabinet normal play shielding effectiveness, but must be to deal with the connection of the cable ◊ ◊ each approach has its inherent defects such as the conjugate ryukyu and ring is used to increase the loop impedance, the neon want to consider the option of ferrite materials, the size and quantity of the magnetic ring, common mode the conjugate ryukyu and circle the number of turns and installation a M, very professional problem such as the frequency of the data transmission and is difficult to operate; Using filtering device is connected, relative to the shielded cable has many advantages: the interference electric ryukyu and filtering of the filter to the cable, so as to fundamentally eliminate electrical cable shielded cable with the radiation ◊ just to prevent interference by cable radiation, actually interfering signal in the cable still exist, when using the equipment such as printers prone to pay, by radiation antenna effect for the printer.
;
filter is more stable than the shielded cable to cable radiation suppression ◊ shielded cable effect is very big Cheng Qian depends on the termination of the cable, and cable frequent disassembling and after long time use by contact oxidation will cause the loss of shielding effectiveness.
; The use of the
filter can reduce the demand for cable termination, made it possible to use cheap shielded cable, reduces the use cost.
;
but the same, the use of filter also has its disadvantages, because for all pin has a low pass filter, and in order to keep the balance of the balance of the cable, the impedance characteristics should be consistent, this has increased the filter design and manufacture of hard to execute, consummation constantly lift equipment information transmission speed at the same time, the bandwidth is more and more wide, and the existing signal filter is primarily designed for low frequency applications, can't meet the new requirements.
;
use shielded cable, must ensure that the connection to a low impedance cabinets, shielding cable ends at the same time want to be a good connection with low impedance rf neon. This in practice because the joints with the shielding cabinets it oxidation or poor contact, or no real low impedance rf, resulting in a decline in the shielding performance of the whole system, especially in the lap of the cable is large, its shielding effectiveness decline rapidly, can not meet the use requirement.
;
as a result, in actual use of the cabinet should be referring to the use requirement of shielding cabinets, the use of optical fiber access, and pay attention to the wire cable to deal with, can't enter the shielded cabinet with optical fiber, because of the optical fiber as an insulator, went up from fundamental electric ryukyu in addition to the common mode of transmission circuit, guarantee the shielding effectiveness of shielding cabinets.
;
shielded cabinet the proper use of the
;
it is not hard to see through the above analysis, to make the shield cabinet normal play shielding effectiveness, but must be to deal with the connection of the cable ◊ ◊ each approach has its inherent defects such as the conjugate ryukyu and ring is used to increase the loop impedance, the neon want to consider the option of ferrite materials, the size and quantity of the magnetic ring, common mode the conjugate ryukyu and circle the number of turns and installation a M, very professional problem such as the frequency of the data transmission and is difficult to operate; Using filtering device is connected, relative to the shielded cable has many advantages: the interference electric ryukyu and filtering of the filter to the cable, so as to fundamentally eliminate electrical cable shielded cable with the radiation ◊ just to prevent interference by cable radiation, actually interfering signal in the cable still exist, when using the equipment such as printers prone to pay, by radiation antenna effect for the printer.
;
filter is more stable than the shielded cable to cable radiation suppression ◊ shielded cable effect is very big Cheng Qian depends on the termination of the cable, and cable frequent disassembling and after long time use by contact oxidation will cause the loss of shielding effectiveness.
; The use of the
filter can reduce the demand for cable termination, made it possible to use cheap shielded cable, reduces the use cost.
;
but the same, the use of filter also has its disadvantages, because for all pin has a low pass filter, and in order to keep the balance of the balance of the cable, the impedance characteristics should be consistent, this has increased the filter design and manufacture of hard to execute, consummation constantly lift equipment information transmission speed at the same time, the bandwidth is more and more wide, and the existing signal filter is primarily designed for low frequency applications, can't meet the new requirements.
;
use shielded cable, must ensure that the connection to a low impedance cabinets, shielding cable ends at the same time want to be a good connection with low impedance rf neon. This in practice because the joints with the shielding cabinets it oxidation or poor contact, or no real low impedance rf, resulting in a decline in the shielding performance of the whole system, especially in the lap of the cable is large, its shielding effectiveness decline rapidly, can not meet the use requirement.
;
as a result, in actual use of the cabinet should be referring to the use requirement of shielding cabinets, the use of optical fiber access, and pay attention to the wire cable to deal with, can't enter the shielded cabinet with optical fiber, because of the optical fiber as an insulator, went up from fundamental electric ryukyu in addition to the common mode of transmission circuit, guarantee the shielding effectiveness of shielding cabinets.
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