User's Manual

EMS Wireless
EMS Wireless EkoMini Manual
7
EkoMini™ Manual
Description
The EkoMini is a band selective, bi-directional amplifier unit and was designed to
provide enhanced RF coverage for wireless systems in small facilities. Usage includes
providing coverage in retail stores, offices, warehouses, restaurants, homes, etc.
The EkoMini is housed in an indoor mountable enclosure, and is powered with a
regulated wall mountable power supply.
The EkoMini supports most system protocols including CDMA, GSM/PCS1900 and
TDMA and is available in models that cover all licensed 1.9 GHz PCS bands A through
F, ESMR/SMR 806-866 MHz and Cellular 821 to 894 MHz. Band selective filtering in
both uplink and downlink signal paths is accomplished with down conversion to an
intermediate frequency and SAW filtering to provide maximum selectivity from out of
band carriers.
The EkoMini features auto set-up, lightweight compact enclosure, optional remote
alarming, excellent electrical specifications, high reliability and cost-effective pricing.
Functionality
In order to function properly, during initial set-up the downlink signal must be presented
to the EkoMini. Without the downlink signal, the unit will not operate properly.
The EkoMini is capable of automatically adjusting its own signal gain levels up to the
maximum output power levels. The EkoMini detects the downlink output power and
adjusts the level for 20-dBm composite output power and continues to monitor and
reset the gain as required for proper system performance. For example, when a
CDMA protocol system is being amplified, there could be an error in set-up initially
resulting from only pilot sync, and paging Walsh codes being present on the RF carrier.
The EkoMini will reduce the system gain until no signal is received that will exceed the
output power setting. This prevents the EkoMini from setting up to a higher power
level than actually desired if all of the Walsh codes were present. The gain does not
continually change to maintain an output power of 20 dBm (AGC) since this would
defeat and fight the benefits of power control in the system. The user may reduce or
limit the power output level by adjusting the peak power limit as described below. The
user peak power switches will set the unit’s output power up to 14 dB below the
maximum power output of 20 dBm; the user interface to control this feature is the peak
power switches.