MAXUS Technologies, Inc. Nov. 26, 2004
10
REPEATER M O D EL M G R-3 0 8
5.3 Power Supply & Operating Status Check
5.3.1 Before turning on the power of the repeater, it is suggested to check the input power level from the
outdoor antenna. If it is lower than -70dBm, the repeater coverage will be reduced. The optimum coverage
can be obtained between the input power level of -60dBm and -40dBm.
5.3.2 Status Check with Cellular Phone - Checking the operating status with cellular phone is one of the
simplest methods. First, confirm the incoming signal levels in the building under the power-off condition of
the repeater, then compare the levels after the power-on. It is desired to check this at the position as far as
possible from the repeater. Also, it is suggested to check the incoming signals by using one more cellular
phone models, from the various service providers within the frequency band. At this time, if it’s favorable
condition, the signal level meter of the cellular phone should indicate the higher level.
5.3.3 Check & Measurement With Measuring Instrument - As a method to perform more detailed
measurement, this enables to determine how level of signals can be received actually indoor, by means of
spectrum analyzer or field strength meter.
5.3.3 Check & Measurement with Measuring Instrument - As a method to perform more detailed
measurement, you can use spectrum analyzer or field strength meter, by which the signal level received into
the building can be checked.
5.3.4 When more expanded indoor coverage is desired - As options of this equipment, outdoor Yagi
antenna and indoor Patch antenna may be provided. They can expand the coverage through the superior gain,
compared with conventional antennas. If using the outdoor Yagi antenna, since it enables to exchange signals
more dynamically from/to the base station, it is available to transmit full 10dBm, the maximum output of the
repeater. And, if using the indoor Patch antenna, as it enables to dispatch signals to the cellular phone more
effectively than the usual omni antenna, it is possible to send call signals far away. However, since they have
unique directivity, the proper directing of the signal is required.
5.3.5 If the input power from the outdoor antenna is -54dBm, maximum output power (7dBm) can be
obtained. If the input power increases by 30dB, up to -24dBm, the output power can be maintained to 7dBm
by the ALC function, but, further more strong input may cause saturation in the repeater and bad
characteristics of IMD. These problems can be prevented by the automatic output power shutdown function of
this repeater, and simultaneously, the red LED lamp is on. In this case, the power switch of the repeater
should be turned OFF, and ON for the operation again. The green lamp color shows the normal operation of
the repeater.
