9 FUNCTIONS: Can be used as OTDR, event reflection, optical power meter, visual fault locator, stable light source, Ethernet cable distance, Ethernet cable tracker, RJ45 Ethernet cable sequence, LED lights. MAIN FUNCTIONS: FTTx and access network construction and maintenance evaluation, fiber break point identification, fiber cable length measurement, relative optical power loss calculation. Wavelengths: 1310/1550 nm Fiber Type: G.652 SM Fiber Dynamic Range:26/24dB Event Blind Zone: 3m ATT Blind Zone: 8m Test Range: 10m~60km Pulse Width: 5ns~10us Reflection accuracy: ±3dB Main Interface Turn on and enter the main menu.There are eight functional modules. Select module by pressing the direction keys, and then press the "OK" key to enter the corresponding functional interface. OTDR Link quality and information can viewed. After the test is completed, Link information includes length, total loss and number of events.Detailed event information can be viewed from the event list. iLOM (Event map) The function can be tested automatically by one key, and the information of the length of the link, the type of event point and the position of breakpoint can be displayed in a graphical form. The result is easy and clear to understand. OPM This function is used to test the power of optical signal and insertion loss of various devices and optoelectronic components. It can identify and measure the frequency of 270/3301k/2kHz frequency optical signal. Wave Range: 800nm~1700nmInterface Type: Universal Joint FC/SC/STTest Range: -50dBm～+26dBmUncertainty: ±5%Frequency Identification:CW/270/330/1k/2kHzCalibration wavelength: 850/1300/1310/1490/1550/1577/1625nm VFL Visible red light (650 nm) is injected into the optical fiber, and the position of the optical fiber fault point can be judged conveniently and accurately by observing the leakage position on the measured fiber. It is suitable for the detection of bare optical fibers, jumpers and other high loss sections caused by near-end faults and micro-bending of optical fibers and cables which can leak red light.Wavelength: 650nm±20nm CW/1Hz/2Hz/Connector: FC/SC/ST Avoid looking directly at the output port. can cause damage to human retina. LS Source The wavelength of stabilized source is the same as OTDR wavelength. It is used to measure the parameters of telecommunic-tion, CATV, LAN cable, insertion loss, isolation loss and echo loss of optical passive devices, and wavelength responsiveness of detectors. There are five modes of light source: CW,270 Hz, 330 Hz, 1 kHz and 2 kHz.LD Type:FP-LDWavelength:1310nm/1550nm±20nmOutput Power: ≥-5dBmModulation Frequency: 270/330/1k/2kHzStability: CW，±0.5dB/15min (Test after 15 minutes of preheating)Connector: FC/UPC（Interchangeable SC、ST） RJ45 Sequence RJ45 line sequence measurement. F1:Start Test F3:Switch Line Sequence Standard F4:Return to the main menu RJ45 Line Length & LineTracker RJ45 Line tracking Used for RJ45 cable length testing and wire tracker.After the line-finding function is activated, the cable being searched is touched by the distal end of the line-searching, and the sound of continuous "drops and drops" is heard. Test Range: 300m System settings Set up automatic shutdown, backlight brightness, time,language,upgrade and other information. F1:Optional for switching the current menu F3:System Software Upgrade F4:Confirmation settings Other Parameters: Display: 3.5 inch Color LCDData Interface: Micro USBExternal storage: TF CardPower SupplyPolymer Li-Battery：3.7V，4000mAh Adapter：5VDC，2ABattery Life: Standby＞20h；Measuring time＞12hOperating Temperature:-10℃～+50℃Storage Temperature: -40℃～+70℃Relative Humidity: 0～95％Non CondensingSize:173mm×82mm×37mmWeight: ≤350g Note： 1 Test Temperature25℃±2℃，Maximum pulse width，Average time≥3min 2 Test conditions of Event Blind Zone are minimum range,minimum pulse width,reflection loss of optical end≥45dB,typical value