 | Improved functionality concerning the storing of data points. Users may now store data starting at any number, rather than always starting at "1". |
 | Improved functionality to the Link Wizard, which makes setting a dual-wavelength certification reference more intuitive and user-friendly. |
 | Correction to an issue in version 4.55, 4.56, and 4.57 where readings may be incorrectly displayed as PASS when they may be a FAIL, in some application standards such as Ethernet and
FTTH. It should be noted that stored data is accurate and correctly displayed in OWL Reporter after downloading to the PC. |
 | Link certification support for 10-Gigabit Ethernet networks. |
 | Improved functionality of the manual reference link budget method. |
 | Improved dual-wavelength measurement display. |
Click the links below to download the upgrade
file and upgrade instructions:
Fiber OWL 4 firmware upgrade file to firmware version 4.67 (MSI; 1.5MB)
Fiber OWL 4 firmware upgrade instructions (PDF; 367 KB)
OPERATIONS GUIDE: Some firmware updates change the appearance of the Fiber OWL 4 screens. The current Fiber OWL 4 operations guide will show these changes. Click
here to download the updated Fiber OWL 4 operations guide.
OWL REPORTER DOWNLOAD SOFTWARE: The latest version of OWL Reporter is required to take advantage of the improved functionality of manual reference link budgets. Click
here to download, or click
here to visit the OWL Reporter download page.

NOTE: using this "FLASH" file for
Fiber OWL 4 firmware versions released prior to 4.10 will result in the meter
losing its serial number and user settings. Meters before 4.10 will need
to be sent to OWL for updating. Contact OWL at 262-473-0643 for more
information.
NOTE: starting with firmware version 4.41, the
bottom row of keys on Fiber OWL 4 series optical power meters have been re-mapped. If upgrading
from version 4.40 or earlier, a new keypad will be required. For
instructions on the new keypad mapping, please download the latest Fiber
OWL operations guide. Please contact OWL at 262-473-0643 for more
information about these new keypads.