Adjusting Booster Attenuation - SureCall SC-PolyO2-72 User Manual

Switch 1 Switch 2
1 dB 2 dB
Additive combination effects:
Switch 1 (1 dB) + Switch 2 (2 dB) = 3 dB attenuation
Switch 1 (1 dB) + Switch 2 (2 dB) + Switch 3 (4 dB) = 7 dB attenuation
Switch 1 (1 dB) + Switch 2 (2 dB) + Switch 3 (4 dB) + Switch 4 (8 dB) = 1 5 dB attenuation
Switch 1 (1 dB) + Switch 2 (2 dB) + Switch 3 (4 dB) + Switch 4 (8 dB) + Switch 5 (16 dB) = 31
dB attenuation

Adjusting Booster Attenuation

By default, all switches are turned OFF, meaning all frequency bands are operating at full gain.
• Turning a switch OFF increases booster gain for the selected channel.
• Turning a switch ON adds attenuation (reduced amplification) for the selected channel.
Switches should remain in the OFF position unless red flashing lights occur for a channel
or channels. Red flashing lights indicate that the system has detected oscillation for the
corresponding channel(s) and turn off if adjustments are not made.
Keep in mind when adjusting the booster: Full power is not always the best option. Your goal
is to obtain a usable cellular signal in as many areas of the building as possible. A successful
installation means that you can make calls without dropping and/or have a reliable data
connection.
Each bank of DIP switches contain five switches. From left to right, the DIP switches in each
bank provide 1, 2, 4, 8, and 16 dB of attenuation (reduced amplification). These switches
are cumulative, meaning that the total amount of attenuation for a channel is equal to the
combined dB of all ON DIP switches in the corresponding bank.
A few practical examples:
• Turning all switches OFF = 0 dB attenuation (booster is at full gain).
• Turning ON Switch #1 in a bank = 1 dB attenuation (booster maximum gain is reduced by
1 dB).
• Turning ON Switches #1, 3, and 5 in a bank = 1+4+16 dB attenuation = 21 dB attenuation.
• In an 80 dB booster, this means the selected channel would be reduced to 59 dB (80 dB
-21 dB).
• Turning ON all switches in a bank = 1+2+4+8+16 dB attenuation = 31 dB attenuation
In an 80 dB booster, that means that the selected channel would be reduced to 49 dB (80
dB-31 dB).
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Switch 3 Switch 4
4 dB 8 dB
Booster Controls
DOWNLINK
Switch 5
1 2 4 8 16
16 dB
1 2 3 4 5
1 2 4 8 16
PS700-DL
UPLINK
1 2 4 8 16
1 2 3 4 5
1 2 4 8 16
PS-UL
19