User's Manual

Exhibit 8
Page 5 of 5 FCC ID: MIJZEPCPE-USB-01
12/30/99
8.3.8.1 ODU/PCU IF
The upstream IF interface shall be a single cable. The connector type and the required interconnect
medium shall be selected based on common use in the cable industry. Note that the cable is not included
with the unit at the time of sale or in unit production cost analysis.
8.3.8.2 PCU/IDU IF
The upstream IF interface shall be a single cable. The connector type and the required interconnect
medium should be selected based on common use in the cable industry. Note that the cable is not
included with the unit at the time of sale or in unit production cost analysis.
8.3.8.3 Serial Communication Interface
The physical serial communication interface shall be selected based on availability in common personal
computers.
8.3.8.4 AC Line Voltage
AC line voltage shall connect directly to the Power Control Unit only. Reference Section 8.4.3 for details
regarding the line voltage interface to the PCU.
8.4 Component Specifications
This section defines requirements for the Components of the Zephyr Subsystem.
8.4.1 Outdoor Unit (ODU)
This section defines the requirements for the Zephyr Outdoor Unit.
8.4.1.1 Frequency Range
The ODU shall operate in the LMDS Block B frequency band with sub-bands defined in the following
table. All frequencies are in MHz.
Band Downstream Pilot Upstream Sub-bands
Name Low High Center ‘a’ Low ‘a’ High ‘b’ High ‘c’ High
B 31003 31075 31001.5 31225 31250 31275 31300
One ODU hardware platform shall support all upstream sub-bands. Only a programming configuration
change shall be required to modify the sub-band of operation.
Product Differentiating Feature
The configurable upstream sub band requirement is a product differentiator in comparison to the current
Millitech product line. Millitech requires the Service Provider to purchase a different ODU model for
each sub-band. Following are some advantages provided by software configurable sub-bands:
• The Service Provider is required to forecast and carry fewer part types in inventory.
• The Service Provider is afforded the flexibility to use the ODU in any of the upstream bands when
installed in the field.
• CPE operating upstream sub-band may be modified after the equipment has been deployed, as the
system is built out.
8.4.1.2 Transmit Function
The Zephyr ODU shall upconvert and perform over the air transmission of the upstream IF input from the
IDU. Transmit upstream sub-band is based on programmed configuration. The RF performance, power
level and radiation pattern of the up conversion and transmit function shall be as required to meet LMDS