Black Box ACU4222A - Manual (Page 19)

SERVSWITCH BRAND USB MICRO EXTENDER FAMILY
18
3.3 Remote Unit Installation
Setting the Cable Length DIP Switches
If your application uses CATx cable less than 25m in length, you can continue to the next
section.
Micro Extender Remote units incorporate video equalization circuitry, allowing you to
compensate for the loss in image quality that occurs when video signals are transmitted along
CATx cables. At the factory, Remote units are configured to optimize the video signals for
Interconnect cables up to 75ft (25m) in length.
If you intend to use cables of 75-150ft (25-50m) in length:
1. Locate the DIP switches on the underside of the Remote unit. DIP switch 1 is used for
video channel 1, DIP switch 2 for video channel 2.
2. Set the DIP Switches as follows:
Interconnect Cable Length
(ft) (m)
DIP Switch Position
15 – 75 5 – 25 OFF (default)
75 – 150 25 – 50 ON
If you are carrying out a test placement prior to final installation, set the DIP switch to
the position appropriate to the test cable’s length. When your tests are complete, set the
DIP switch to the position appropriate for the CATx cable length used in the full
installation.
Technical Note: The video compensation does not adjust skew. Although
skew (color separation) can be an issue on some CATx cables, it would
not normally be observed on cables <150ft (50m). Even so, we still
recommend the use of low skew cables with USB Micro Extenders. You
can test for skew by viewing the online test card at:
http://www.blackbox.com/tech_support/ts_upgrades/ts_ss.html