What wavelengths will the DTX-FTK measure?

The DTX-FOM (Fiber Optic Module) is calibrated at the following four wavelengths: 
  • 850 nm
  • 1300 nm
  • 1310 nm
  • 1550 nm
The SimpliFiber source provided with the kit is 850 nm / 1300 nm for multimode fiber only. For singlemode testing, you should look to the singlemode SimpliFiber sources. If you have an existing source, you can of course use this.
 
However, the DTX-FOM will read the wavelength coming from the SimpliFiber sources. For example, if you set the SimpliFIber source to 1300 nm, the DTX will detect the source as 1300 nm and make the measurement without prompting you to choose a wavelength. The SimpliFiber source will need to be in AUTO mode. 

Learn About:
- Fiber Testing

Optical Power Monitoring - DTX Fiber Test Kit

The power meter function enables you to monitor the optical power produced by a source, such as a 1000BASE-SX port.
 
The DTX CableAnalyzer provides two ways to do this:
 
SINGLE TEST mode: measures power in the current remote end configuration. Takes one power measurement at 850 nm, 1300 nm, 1310 nm or 1550 nm and allows the user to save the result. 

  
MONITOR mode: monitors power continuously at the INPUT port at 850 nm, 1300 nm, 1310 nm or 1550 nm. If you monitor power in this mode, the user CANNOT save the power measurement.

Mandrels (for use with an LED source only) - DTX Fiber Test Kit

ANSI/TIA/EIA-568-B.1 mandrel guidelines
The mandrel diameter and number of mandrel wraps is specified in TIA/EIA-568-B.1 clause 11.3.3. The diameter varies depending upon the fiber core size and launch cable diameter.

Short link lengths of multimode optical fiber may appear to have higher than expected attenuation due to the power lost in the high-order modes. To remove high-order mode transient losses from multimode optical fiber measurements when using a source that excites these transient high-order modes, the reference jumper should be wrapped in five non-overlapping turns around a smooth round mandrel (rod) during the reference calibration of the source to the detector and for all loss measurements. The mandrel diameter depends on fiber core size and shall be as specified in table 11-15 (shown below). 
 
TIA/EIA-568-B-compliant multimode mandrels for 3 mm test jumpers are available for purchase from Fluke Networks. 


 


 
 
Place mandrels on the testers output fiber, as shown in the reference diagram (Figure 2). 

.. and the test connection diagram (Figure 3). 


 
 

Customize Test Limit - DTX Fiber Test Kit

If you select General Fiber Optic as your test limit, the loss limit is 4.5 dB. This is a default value. However, you will probably have calculated your own loss budget. If you know the link is 100 meters and there is only one mated connection at each end, the loss budget would be:
 
          Connector Loss = 0.75 dB
          Cable Loss @ 850 nm = 3.5 / 100 (assuming the fiber loss is 3.5 dB/km
          Connector Loss = 0.75 dB
 
          Total Loss Budget = 0.75 + .35 + 0.75 = 1.85 dB
 
To change the limit in the DTX to 1.85 dB, you will need to create a custom Autotest. 
 
  1. Turn the rotary dial to SETUP.
  2. Select Fiber.
  3. Select Test Limit and press ENTER.
  4. Press F1 to see more standards options.
  5. Select Custom.
  6. Press F1 to create a new limit.
  7. Enter a name for the test limit.
  8. Select Use Default Values From.
  9. Change this to General Fiber Optic (Found in Application directory).
  10. Now you can set your own loss limit at each wavelength.
  11. Now press SAVE to store your new limit.
  12. Press ENTER to select it.
  13. Turn the rotary dial back to AUTOTEST.

Dont forget, in the SETUP the Remote End Setup option needs to be set as Far End Source.