Operation & Maintenance Manual

TELCOSAT RPT 700
Page | 13
Document use is restricted to that described on the cover
After adjusting the receive signal levels from the Cellular Tower we now adjust the power levels for the
area fill. (Down-Link Signal)
For the next step you can use your cellular phone signal level indicator or preferably a spectrum analyzer.
Toggle down the area fill switches in 2dBm steps until the desired power levels have been obtained.
3.10 ADJUSTING UP-LINK TRANSMIT POWER TO CELLULAR TOWER
It is important to only use the minimum required power level for the Up-Link transmit
power. The required power level can be provided from a RF Systems Engineer or
appropriate RF Path Loss computer software. Contact Telcosat Inc for more details about
our RF Path Loss profiling tool.
CONNECT A SPECTRUM ANALYZER OR AN RF POWER METER TO MEASURE MAXIMUM
TRANSMIT POWER FOR THE UPLINK AND DOWN LINK CARRIER.
Make a test call while the repeater is adjusted to the minimum gain on the appropriate Uplink Frequency.
When making the test call on your cellular phone you must be a minimum of 30 metres (100ft) from the
area fill antenna.
If you cannot complete the call increase power in 2 dBm increments. Make a test call after every
adjustment.
NOTE: YOUR REPEATER HAS THE CAPABILITY TO BOOST SIGNALS FROM AS
LOW AS -104dBm. THIS IS BELOW THE RANGE OF YOUR RSSI INDICATOR. USE
A SPECTRUM ANALYZER TO LOCATE YOUR SIGNAL
If you find that you cannot detect any cellular signals using the RSSI indicator then you
must use an alternative method to locate the signal.
If you fail to locate a signal then you have the following possibilities.
1) There is no cellular service.
2) Faulty coax, connectors or antenna.
3) Insufficient antenna separation, (vertical separation/ horizontal separation)
4) Aimed to a competitor’s cell tower which does not service your cellular phone. This may show full
power on your cellular phone but will not connect to the service.
3.11 CALIBRATION and TUNING
Your BDA, during the manufacturing process, is tested and measured to meet the required
performance standards. There are no tune up procedures required for this BDA.
Your repeater requires no further field testing or measurement.