User's Guide Part 1

Table Of Contents

Chapter 1: Product description Wireless operation

Further reading

For information about…

Refer to…

Link range capability upgrade Capability upgrades on page 1-51

Effect of link range on data throughput

capacity

Calculating data rate capacity on page 3-27

Data throughput capacity tables on page 3-71

How to generate a license key for maximum

link range

Generating license keys on page 6-3

How to configure link ranging Wireless Configuration page on page 6-21

Automatic detection of link range ODU installation tones on page 6-111

OFDM and channel bandwidth

The PTP 700 series transmits using Orthogonal Frequency Division Multiplexing (OFDM). This

wideband signal consists of many equally spaced sub-carriers. Although each sub carrier is

modulated at a low rate using conventional modulation schemes, the resultant data rate from

the sub-carriers is high. OFDM works exceptionally over a Non-Line-of-Sight (NLoS) channel.

The channel bandwidth of the OFDM signal is configurable to one of the following values: 5,

10, 15, 20, 30, 40 and 45 MHz. Higher bandwidths provide greater link capacity at the expense

of using more bandwidth. Systems configured for a narrower channel bandwidth provide

better receiver sensitivity and can also be an appropriate choice in deployments where the

amount of free spectrum is limited.

Each channel is offset in center frequency from its neighboring channel by 10 or 5 MHz.

Note

The Channel Bandwidth must be configured to the same value at both ends of the link.

Not all channel bandwidths are available in all regulatory bands.