User's Manual

ManualsBrandsBird Technologies Group ManualsElectronicsOne-Way Signal Booster Amplifier

EXHIBIT 2 PAGE 11 OF 17

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

are subjected to excessively high signal levels,

power surges or lightning strikes, failures may

occur. The following procedures may be followed

for detecting a malfunctioning unit or as part of a

periodic maintenance program.

1) The heatsink area should be cleared of dust

and debris.

2) Inspect the unit to see that the power supply

LED DC indicator is lit (remove any dust or

debris that may obscure the LED). This will ver-

ify that DC power is flowing properly. Check all

hardware for tightness.

3) Compare system performance to initial perfor-

mance levels measured when the system was

first installed. The lack of signal can be traced to

a malfunctioning amplifier by progressive signal

monitoring from the output (far end) to the input

end of the system noting the area where the

signal returns to normal level. The next amplifier

toward the output end of the system will proba-

bly be the one that failed.

Measure the gain at any convenient frequency

in the working frequency band to verify that the

gain specification is being met. If the gain val-

ues fall below that specified for the model check

the following:

A) Open the signal booster cabinet and inspect for

any loose or broken connections or cables, and

repair as necessary.

B) Measure the output of the power supply to see

that the proper operating voltage is being main-

tained.

C) If the operating voltage is proper but the gain is

still low, measure the gain of each amplifier

stage until the one with low gain is isolated.

Replace a low gain amplifier with a new ampli-

fier stage to correct the problem.

DETAILED SUBASSEMBLY DESCRIPTIONS

The following section details the operation of each

assembly in the One-Way Signal Booster System.

Preselector Assembly 3-14478

The RF input to the system is first applied to a

combline bandpass filter which limits the frequency

applied to all subsequent stages. The bandwidth of

this filter is determined by the spacing between the

tuning rods which are all located on one side of the

aluminum housing and vaguely resemble the teeth

of a comb (hence the name). This filter is consid-

ered to have one section for each tuning rod. the

greater the number of sections, the greater the

selectivity and ultimate rejection of the filter. These

filters are not intended for tuning to other frequency

Sampler

Detector

Electronic

Attenuator

OLC Assembly

Filter

Amp

Control

10 dB Pad

SPECTRUM

ANALYZER

SIGNAL DISTRIBUTION SYSTEM

BOOSTED

RF SIGNA

Figure 5: Test equipment interconnection for surveying performance.