SFP (Small Form-factor Pluggable) is an upgraded version of GBIC (Gigabit Interface Converter), which is an interface device for converting gigabit electrical signals into optical signals. The design can be used for hot plug, and the SFP interface is widely used in switches. Ordinary routing products can be expanded to access function by supporting SFP interface.
Commissioning range: During the test phase:
Temperature: Temperature range: -40℃ ~ + 85℃; Test range: -20℃ ~ + 70℃;
Optical power range: minimum: -23 dbm.
Test purpose: bit error rate test is essentially to output a known data bit flow to the device under test, and then capture and analyze the data flow returned by the device under test. In order for different instruments to have the same test results, a particular pseudo-random sequence is often applied, a standard derived from the communications industry definition. Simple: Test if there is any error in transmitting data during transmission. It is one of the embodiment of verifying the quality of the transmission signal.
Test requires equipment: error meter, test board, optical module, computer, fiber cable, SMA copper axis, etc
As shown in the figure, the error ER panel is introduced
Test board: SMA coaxis conversion to optical signal is required.
Optical module: as shown in the first figure of this article.
Optical fiber line: LC, SC single mode, multimode, according to the optical module corresponding selection.
SMA copper axis: only requirement: transmission frequency.
1、test pattern:
1. Electric to light: the electrical signal emitted by the error device is converted into optical signal through the test board and the optical module, and then input into the error meter.
2. Optical transfer: the light signal emitted by the error reader is converted into an electrical signal through the test board and the optical module, and then input into the error reader.
3.Two optical modules are used to convert the electrical signal emitted from channel 1 into optical signal through test board and optical module 1, then the optical signal is input into optical module 2, converted into electrical signal through test board and optical module 2 and input back to the error ER for comparison.
A simple electrolight mode as shown in Fig