TB9100 Calibration Software User’s Manual Calibrating the Power Amplifier 27
Setup for Inline
Power Meter
Note: Cables and connectors can easily cause a power loss of several
watts if either too long or poorly terminated. Always use the
shortest possible leads (or connectors instead of leads) between the
PA and power meter set-up.
To calibrate the PA transmit power
1. Make sure that the equipment is set up and that the Calibration Software is
connected to the reciter.
2. Select the PA Calibration tab, and select Calibrate PA Power.
3. Ensure that the power meter and a 50 ohm load (VSWR < 1.2:1) with a
high power rating are connected to the power amplifier RF output, and
then click Next.
4. Check that the PA RF input is connected to the reciter RF output, and that
the PA and the reciter are connected by a control bus, and then click Next.
5. For each power level shown, use the slider to adjust the DAC setting to get
the required power output, and then click Next Power to move to the next
line.
Note: Click Coarse to roughly adjust the DAC setting, and once
you get within range, click Fine for more precise control over the
settings. To move up or down one DAC value, click either side of
the slider bar.
Note: You must perform the calibration in sequence from the lowest
to the highest step. The DAC setting must be greater than the
previous one otherwise the value will not be stored in the PA, and
you cannot move to the next line.
6. When you have completed adjusting the DAC settings, click Finish.
When you have finished, the icon on the PA Calibration tab indicates that
this task is complete.
1 3
2
4
5
1 Reciter 3
PA
5 Load
2 16-way cable 4 RF Power Meter
To Next Page
Loading...
Need help?
General
