Communications, Inc. Switch User Manual



GE/AR80 Installation Manual

580-00519, rev A 29 of 40

c) Always evenly tighten bolts in small fractions at a time to ensure minimum

change to your completed alignment.

6) Connecting the Fiber

a) Connect the fiber cable to one of the radios at a time. The fibers should already be

connected to active network equipment.

b) Verify the fiber LED’s on each of the radios are illuminated solid

Note: The fiber integrity indication on the network equipment could show up or

wn independent of the link status.

7) Auto Calibration

a) Once the fiber is connected to the radio, the radio will begin an internal link

calibration.

b) During this time the Link Up LED will blink for approximately 120 seconds.

c) Wait until the Link Up LED is lit solid

d) Verify the Link Quality voltage is 3.0-3.3V (i.e., error free). Repeat steps (a-c) for

the far-end radio. For more details on Auto Calibration see section 3-9 below

8) Removing the Test Cable

Removing the test cable from the radio, replace the rear plastic cover and hand

tighten the back cover nut to the point where the back cover stops (i.e., when it

hits the metal ring on the back metal plate). The installation is now complete.

The most important alignment "tools" for these models are care and patience! It is

recommended that these models be aligned with personnel present at both ends of the

link, and the installers should allow up to 90 minutes to optimally align these units.

The GE/AR80 links have a narrower beamwidth (0.9 degrees) than the GE/AR60 radio

beamwidth (1.4 degrees) and operate at much farther distances.

3.9 Auto Calibration

The Auto Calibration feature scans the RSL level of the system (after the system is

igned) on each radio terminal where the level is calibrated against an internal

calibration table that corresponds to an expected receive power level. The radio system is

said to be in Alignment Mode when it is first powered up and no fiber is connected. Once

the alignment is completed; the Auto Calibration mode is triggered ON as soon as the

fiber cable is connected. You will know the radio terminal has initialized the Auto

Calibration when the Link LED is flashing on/off - this lasts for up to 120 seconds. The

radio terminal needs to detect an optical signal of the appropriate Wavelength. For this,

one would require having the fiber optic cables terminated to a fiber port on a switch or

this can be accomplished with a fiber optic jumper cable by connecting the fiber output of

the radio into the fiber input of the radio. Loopback should only be connected long

enough for auto-calibration to start and should be removed immediately.

* For pricing and a quotation, visit MeridianMicrowave.com