Using The External Audio Source; General Deployment Concepts; Deployment Techniques And Radio Measurement Technique; Performing Measurements - Nortel 7430 Deployment Manual

While viewing the signal meter on the display of the handset and listening to the sound quality
through a headset, it is also important to simulate the influence of the human body when using
the handset. To simulate this, place your free hand around the back of the handset and cup the
upper third of the handset with your palm.

4.3 Using the External Audio Source

The deployment base station is equipped with a connector to which can be connected a CD
player or another audio source. This audio source can be used as a substitute for a second
person to talk to/with.

4.4 General Deployment Concepts

The Digital Mobility Deployment Kit is built for use in both internal and external environments and
with one or two persons. The three main factors involved in determining the boundaries are:
•
Q-value
Indication of quality of the communication between the handset and the base station
•
Sound quality.
The audible sound quality should be monitored at all times. Poor sound quality is equal to
bit failures in the communication between the handset and the base station.
•
RSSI value.
The RSSI value is an indicator for the signal strength from the base station.

4.5 Deployment Techniques and Radio Measurement Technique

An active call is a necessity for determining the boundaries of radio coverage. When performing
a deployment involving two technicians, one should remain stationary next to the deployment
Base Station to act as a constant while the other measures radio coverage. The sound quality
should be monitored by both parties – transmitter and receiver.
When one technician is performing the deployment, then the use of an audio device, such as a
CD player or a tape recorder is necessary to provide audio for monitoring of sound quality.
It is recommended to use a headset to assist with measuring radio signal strength. This allows
the installer to listen to the quality of the voice while simultaneously viewing the signal values.
Additionally, simulate the interference of the human body by using a free hand to cover the rear of
the handset behind the display cup the upper third of the handset with your palm.

4.6 Performing Measurements

While performing the deployment, monitor the Q-value while moving away from the Base Station.
When the Q-value reaches 52 or becomes unstable (significant fluctuating) the limit of the radio
coverage has been reached.
During measurement of radio coverage it is important to simulate the influence of the human
body. This can be done either by shielding the antenna by the hand or by turning the handset
and the body in a way to achieve a "worst case" situation for reception of the radio signal from a
given base station.
In both situations it is important that the Q-value is stable and not significant fluctuating.
During deployment, only the coverage area boundaries need be documented. It is not necessary
to survey the complete area within the coverage cell. Special attention should be paid to
staircases, elevator shafts, shielded rooms, etc.
Begin the deployment using the floor plans provided by the customer.
Digital Mobility Deployment Guide
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