Product Manual

Product Manual for Tornado Radio Unit
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6 CHANGING OPERATING FREQUENCY AND POWER CALIBRATION
6.1 INTRODUCTION
Changing operating frequencies of a Mimomax Tornado radio is done via the CCMS. The radio’s power will need
to be recalibrated and the internal duplexers also need to be re-tuned. Duplexer tuning is covered in Section 7.
6.2 EQUIPMENT REQUIRED: POWER METER
For accurate measurement of average power from Mimomax transmitters a thermistor bolometer type of power
meter (e.g. HP435A or similar) is required. Other types of power meter may give inaccurate average power readings
when used with Mimomax transmitters and may be suitable only for relative power measurement.
The transmitters are accurately set up in the factory to produce 250 mW average power output. To avoid
compromising spectral purity it is very important that the power output be set no higher than this.
6.3 PROCESS OVERVIEW
The process of changing frequencies can be seen below.
Frequency change process
6.4 CCMS PROCESS
To start the process, click on ‘RF TX and Rx’. This page displays the transmitter power level, TX and Rx
frequencies. It is strongly advised to set the unit to +24dBm output power and to measure the transmit power before
starting the process. This can be used as a reference power should you not have an accurate power meter. The
units were factory calibrated to +24dBm, +/-0.2dB.