Calibration

Booster should be pre-calibrated by the supplier, users should never need to recalibrate. Incorrect calibration can damage Booster and any devices connected to it.

• Calibration is performed using the VCP interface
• To calibrate use a 50 Ohm terminator that can safely dissipate 5 W
• <channel number> is 0...7

Module Power Amplifier Current Calibration

Each RF Channel has a power FET that requires a 50mA bias current. The bias current is controlled by a DAC that biasses FET gate voltage. To calibrate the DAC voltage required to achieve 50mA bias current run the biascal <channel number> 50 (50 mA) command. The calibration can done with the inputs and outputs terminated or open.

Output Power Interlock Calibration

Connect the amplifier input to a 200MHz source, terminate its output.

1. Adjust the input power until the output power is approximately 23 dBm
2. Run intcal <channel number> 1 <p_out> where <p_out> it the actual output power (e.g. intcal 0 1 23.2 for 23.2 dBm output power when calibrating channel 0)
3. Adjust the input power until the output power reaches approximately 33dB
4. Run intcal <channel number> 2 <p_out>

A successful calibration will give the following output on the VCP:

[ointcal] done, interlock value = 994
[intcal] Calibration step = 1 completed = 994
[intcal] done, got 2-point cal val 994 pwr 36
[intcal] done, got power factors a=8.91 b=-25.49

Output & Reverse Power Monitoring Calibration

Supply 200 MHz RF to amplifier input at power level that results in amplifier output (P_out) of XX dBm. Connect amplifier output SMA to 50 Ohm load or leave open as instructed.

1. P_out = 0 dBm into 50 Ohm load.
2. Run calpwr <channel number> 1 0.0
3. P_out = 0 dBm into open load.
4. Run calpwr <channel number> 3 0.0
5. P_out = 33 dBm into 50 Ohm load.
6. Run calpwr <channel number> 2 33.0
7. P_out = 33 dBm into open load.
8. Run calpwr <channel number> 4 33.0

After these steps, you should see following result:
TODO ADD CLI OUTPUT

Input interlock calibration

Supply 200 MHz RF to amplifier input at power level = Gen_out. Connect amplifier output SMA to 50 Ohm load.

1. Set output interlock to safe level: intv <channel number> 30.
2. Set Gen_out = 3 dBm, with generator connected to channel input SMA.
3. Run cal <channel number> 0

After these steps, you should see following result:
TODO ADD CLI OUTPUT