User's Manual
Gain Level: Understanding the Control Panel and LED lights
Manual Gain Control
General: Four green LED lights for each frequency band will indicate the level of amplification
that is being applied by the Booster to the receive (RX) signal and transmit (TX) signal. Gain is
applied to both RX and TX signals. Normally all four green LED will be solid on. If any green
LED lights are flashing or off, it is an indication that gain has been reduced. There are four
events that will cause the green LED lights to turn off or flash.
1) Shutdown:
a) Automatic shutdown will occur in one band or both bands if antennas are placed too close
to each other and the ‘Automatic Oscillation (feedback) Suppression’ function cannot eliminate
the oscillation. TX and RX gain will be turned off completely in the frequency band where oscil-
lation cannot be suppressed.
b) Manual shutdown can also be achieved in one or both frequency bands by the user.
2) Oscillation (feedback) Suppression:
The booster will automatically apply attenuation (reduce gain) to suppress oscillation (feed-
back). This function is automatic and cannot be manually overridden.
3) RX High Power Control:
The booster will automatically apply attenuation (reduce gain) if RX power is too high. This
function is automatic and cannot be manually overridden.
4) Manual Attenuation:
Gain can be increased or decreased manually by the user in 1dB steps over a range of 35 dB
for each frequency band, however, the user will not be able to reduce attenuation that has
been applied by the automatic oscillation suppression function or by the automatic high power
control function in order to protect both, the cellular tower and the booster.
The master control button has 3 functions which cycle every 3 times pressed as follows:
1) 800mhz manual gain control Press once. The 3 orange LED lights for the 800 mhz band
will flash together. Use up or down arrows to adjust gain in this frequency band as desired.
Each push of the up or down button will adjust 1 dB of gain. Total manual adjustment range
is 35 dB. Adding more than 35 dB of attenuation will shut down the frequency band. Quick
shutdown of the frequency band can also be achieved by holding the down arrow. When the
frequency band shuts off all of the orange and green LED lights for that frequency band will
flash every 2 seconds.
2) 1900mhz manual gain control Press second time. The 3 orange LED lights for the 1900
mhz band will flash together. Use up or down arrows to adjust gain in this frequency band if
desired. Each push of the up or down button will adjust 1 dB of gain. Total manual adjustment
range is 35 dB. Adding more than 35 dB of attenuation will shut down the frequency band.
Quick shutdown of the frequency band can also be achieved by holding the down arrow.
When the frequency band shuts off all of the orange and green LED lights for that frequency
band will flash every 2 seconds.
3) Manual gain LED display Press third time to display the LED status of your inputed manual
gain settings then power the booster OFF/ON for manual settings to take effect. Each time you
cycle to this 3rd setting you will see your inputed manual gain settings displayed on the LEDs.
Note: the booster will remember manual settings through power on and off conditions. If you
want to return the booster to ‘Fully Automatic Mode’ you must push and hold the master con-
trol button (approximately 3 to 5 seconds) until you see all 800mhz lights flash once from left
to right followed by 900mhz lights flash once from left to right. Power the booster OFF and
then ON for ‘fully automatic mode’ to take effect.
Important:
a) for manual settings to take effect, the booster must be powered OFF and then ON.
b) manual settings cannot override the automatic functions of oscillation and high power
controls. This means that if you are trying to set a gain level higher than the automatic control
functions allow, the manual gain settings will be limited by the automatic control functions.
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