Channel Bandwidth And Link Symmetry Control; Non Line Of Sight (Nlos) And Line Of Sight (Los); Upgradeable Software - Motorola PTP 300 Series User Manual

3.4

Channel Bandwidth and Link Symmetry Control

The PTP 300 series provides configurable channel bandwidth in the radio link (5 MHz, 10
MHz and 15 MHz depending on the frequency band for the bandwidth choice), and
configurable fixed and adaptive link symmetry. Fixed link symmetry supports:
•
3:1
•
1:1
•
1:3
Channel bandwidth 5 MHz supports link symmetry 1:1 only.
3.5

Non Line Of Sight (NLOS) and Line Of Sight (LOS)

The PTP 300 Series Bridge is designed to operate by default in both Non Line Of Sight
(NLOS) and Line Of Sight (LOS) environments. However, the PTP 300 web interface includes
a Line Of Sight mode control. When this control is enabled, the bridge can operate at higher
data throughput rates over a short unobstructed path.
LOS mode is available only where license key enables the capability, the mode is enabled in
the Installation Wizard, and the link range is less than 10 km (6.2 miles). A PTP 300 bridge
operating in LOS mode has the same throughput capacity as a PTP 500 Lite bridge.
3.6

Upgradeable Software

The PTP 300 Series Bridge is fully software upgradeable. New software images are first
downloaded from the Motorola website
computer. The image is then uploaded to the ODU via the web management page described
in Section 7.8 "Software Upgrade". The compressed image is first loaded into RAM and
check-summed. If the compressed image transfer has completed successfully the image is
decompressed and written to flash memory. On completion of this process the unit can be
rebooted to use the newly uploaded image. Should this process fail, the unit will revert to a
protected compressed image installed during manufacturing to allow the unit to be recovered.
4Gon www.4Gon.co.uk info@4gon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
http://www.motorola.com/ptp
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3 Product Features
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