Installation Manual - Meridian Microwave

AR/GE/FE/U 80/80X Installation Manual
3.10Auto Calibration
The Auto Calibration feature scans the receive signal across the entire (broad) band and flattens the
levels, much like the equalizer on your home or car stereo.
The radio system is said to be in “Alignment Mode” when it is first powered up with no fiber
connected.
The Auto Calibration mode is triggered ON as soon as the fiber cable is connected. The fiber
interface of the radio terminal needs to detect an optical signal of the appropriate wavelength. This
requires the fiber optic cables be connected to a 1000Base­X port on an Ethernet device (switch,
router, media converter, etc.) or this can be accomplished with a fiber optic loopback cable by
connecting the fiber output of the radio into the fiber input of the radio.
If used, the loopback cable should only be connected long enough for auto­calibration to start and
should be removed immediately.
The radio terminal indicates the Auto Calibration by flashing the Link LED on/off ­ this cycle lasts
for up to 120 seconds.
Auto­calibration is a required step per installation once antenna alignment is completed.
3.10.1 AdaptRate Fiber Calibration Procedure (AR80 and AR80X only)
In order for an Adaptive Rate link to operate correctly, it is especially critical to ensure the following
process is followed exactly. If you feel this process may not have been followed or you wish to reattempt
the process, be sure to first power down both radios, remove any fiber connection before
turning the system on. This will get you back to original factory radio calibration settings and place
the radio link in “alignment mode”.
START:
1. First, with a local PC, view each radio's Setup page and make sure the operating mode is set
to AR and that the Installation Auto Calibration is 'enabled' at both ends. The default value is
‘enabled’.
VERIFICATION: Double check this setting on both radios.
2. On initial Power up, do not connect any fiber cables
VERIFICATION: It is best to physically disconnect any fiber cables from the radio unit ports,
rather than just relying on the far ends of the cables being disconnected.
3. Upon completing the antenna alignment procedure, make sure both ends have a minimum of
2VDC in Quality voltage, if not, further alignment may be required. Small fluctuations are
okay.
26 580­00519 rev. D