2. Introduction
This full duplex mobile communications repeater from JDTECK is perfect
for providing a wireless improvement in the cellular reception inside a large
office building, under-ground parking lot, warehouse, apartment building,
shopping mall or any other large coverage area requirement.
It is designed to improve the call quality of an area by receiving, amplifying,
filtering and re-transmitting the signals from the base station into a specified
area via a distributed antenna system (DAS) or distributed antenna grid.
To maintain safe and specific output signal levels, this repeater has built-in
signal oscillation detection circuits with color changing LEDs to indicate its
environmental status. The Alarm LEDs located on the front of the unit
(Downlink Alarm & Uplink Alarm) will change color from green to amber or
red, (depending on the intensity) if the system detects signal oscillation in
either band, or if the input signal is beyond a safe limit so as to avoid
interference to the cellular network, the repeater will indicated this.
This repeater also has an automatic gain control (AGC) feature which will
reduce the output power of the repeater if oscillation is detected. This range
can vary from 15-20dB depending on the model of your repeater. If the
reduction in gain needed to take the unit out of alarm exceeds the range of
the AGC, then the end user can make use of yet another feature of this
repeater called manual gain control (MGC). This allows the end user to
further reduce the output gain of the repeater by using the push buttons on
the front of the unit to navigate through the liquid crystal display (LCD) and
manually attenuate (reduce) the repeater’s output gain of either the uplink or
downlink individually.
JDTECK’s repeaters also feature a Network Safe / MUTE feature that
automatically shuts-down the transmission side of the repeater to protect the
cellular network if no adjustments are made to eliminate alarm readings on
the repeater’s LEDs. You will want to make sure the LEDs remain green at
all times for optimum system performance.
The main cause of signal oscillation is when any of the indoor antennas are
too close in proximity to the outdoor antenna on the roof.
Alarm LED status chart and recommended action:
Green
- System functioning well.
Amber
- Mild detection of oscillation.
Red
- Strong signal oscillation.
Off
– Repeater is not transmitting (MUTE Activated)
Features & Functions
Sleek
attractive
housing.
LED indicators to monitor environmental status.
Supports all technologies including GPRS, GSM, CDMA, UMTS & LTE
Low power consumption.
ALC function. (Auto Limit Control – will not exceed max rated power)
AGC function. (Automatic Gain Control)
MGC function. (Manual Gain Control)
MUTE function. (Shuts down if no change in environmental conditions)
LCD Interface. (User Friendly Digital Interface)
Heat Sink cooling fins to dissipate heat quickly and efficiently
Grounding Stud
Power Switch
Outdoor Port
LCD Screen
DC Power Plug
UL Alarm
Enter Buttons
Up / Down Button
Heat Sink Fins
DL Alarm
Indoor Port
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