Aritomi and Yuhang

The output of DDS board is -6.5dBm(shown in the attached figure 1). While the AA demodulation board requires 4-15dBm signal. And this signal should come from the same DDS board with the modulation we send to the EOM (this is board 2).

So our strategy is:

1. amplify this signal by using RF amplifier ZHL-2 (it should have a gain of 16dB from specification)

2. use a RF splitter Z99SC-62-S+ (0-500MHz) to seperate this signal (the signal will degrade by 3dBm by splitting and loss 0.5dB because of losses)

3. in the end, from calculation, we should have identical signal 6dBm. And this is meeting our requirement.

Then we measured the signal. The signal after RF amplifier is 12.4dBm(shown in attached figure 2), this means the gain is 19dB.

The signal after RF splitter is 9dBm(shwon in the attached figure 3).

So we can keep this configuratiuon for AA system.