User Manual

Table Of Contents

Axell BSR 3308-PS NFPA

Product Description and User’s Manual

• No adjustments are required - the tuning procedure is accomplished

automatically, thus saving work hours and equipment usage time for a “plug & play”

foolproof deployment.

• Uplink and downlink balance is preserved – a single adjustment is required for

UL and for DL channels. If the gain of downlink path changes by some value, the

uplink path is changed by the same value. Both channels have to be balanced for the

proper seamless integration of the repeater in the network. Unbalanced operation

bares the risk of reducing the dynamic range of the base station itself.

• Constant output power - The system continuously measures the output power and

adjusts Gain to counter effects of oscillation or high input signal. If Gain cannot be

further reduced beyond its dynamic range and oscillation still exists above user max

power setting, the signal booster power amplifier will shut-down.

• Shut-down -In order to comply with public safety guidelines (required in certain

jurisdictions), the BDA will mute if the DL (composite) power exceeds -25 dBm. You

may need to connect an external attenuator at the input of the BDA, to ensure the

exceedingly high signal levels are not available at the BDA input.

• Reduction of isolation problems - whenever the isolation drops for some reason

the repeater automatically reduces the gain in accordance with the new isolation

conditions. Once the isolation problem is solved the repeater automatically raises the

gain again.

1.5.2 Switchable Bandwidth

The internal SAW Switcher enables implementing the Switchable Bandwidth option. This

function enables more efficient and better adaptability of the Repeater to your needs.

This capability enables you to install the Repeater in different operation environments or

adapt it to the evolving operating environment.

In standard configuration, the Switchable Bandwidth function provides the capability to

set up to three pre-determined different frequency blocks of 3, 10 and 18MHz bandwidth

respectively, as per requirement. The operating center frequency is user adjustable

anywhere within the SMR band.

This capability ensures that in case of bandwidth evolution at the installation site, you

are not required to replace the installed repeater, just set the second bandwidth.

1.5.3 Protection

The Repeater includes protection against high V.S.W.R.

An auto recovery mechanism returns the unit to normal operation, after power or other

failures.