User's Manual

ManualsBrandsBird Technologies Group ManualsElectronicsOne-Way Signal Booster Amplifier

EXHIBIT 2 PAGE 10 OF 17

TX RX Systems Inc. Manual 7-9257 (version 1) 11/03/00 Page 10

power supply assembly is functioning normally.

The red LED is not used.

PERFORMANCE SURVEY

It is a good idea to document the performance of

the system after installation so that a reference

exists for future comparisons. This information can

make troubleshooting an interference problem or

investigation of a complaint about system perfor-

mance much easier. If there are coverage prob-

lems with a system, this survey will usually reveal

them allowing corrective measures to be taken

before the system is put into routine use. The fol-

lowing is an outline of how to do such a survey.

Because the nature of each installation can be

quite different, only a broad outline is given.

1) Measure the gain of the signal booster being

careful not to exceed the maximum input level.

Figure 4 shows this being done using a signal

generator and spectrum analyzer. This is basi-

cally a substitution measurement. Record the

measured values for each passband.

2) The signal booster system is equipped with a -

50 dB signal sampler port following the final out-

put amp (part of the OLC assembly). This port

is for the connection of test equipment such as

a spectrum analyzer and will allow the observa-

tion of the amplifier output at a considerably

reduced output level. This decoupling figure

needs to be added to a measured signal value

in order to arrive at the actual signal level.

3) With a spectrum analyzer connected to the sig-

nal sampler port (see figure 5), have personnel

with handheld radios move to predetermined

points and key their radios. Record the level of

these signals as observed on the analyzer and

also record the location of the person transmit-

ting. In this way, a map of the systems perfor-

mance can be generated.

4) For branches that amplify signals coming from a

fixed antenna or station, record the level of all

the desired incoming signals for future refer-

ence.

MAINTENANCE AND REPAIR

Signal boosters manufactured by TX RX Systems,

Inc. can function reliably for 10 or more years with

little or no maintenance. However, if the amplifiers

Sampler

Detector

Electronic

Attenuator

OLC Assembly

Filter

Amp

Control

ZERO

REFERENCE

GAIN

10 dB Pad

SIGNAL

GENERATOR

SPECTRUM

ANALYZER

Figure 4: Test equipment interconnection for measuring signal booster gain.