Slim_plo2 Test

1. Test on slim_plo2.

The loop filter may need redesign because I use a V583ME01 which is different from ROS-1500.

All modules are connected, and a simple test is performed (No any adjustments have been done).

In this test, I use an old design of 10.2385MHz Crystal ladder filter (which is a worse design, the insertion loss of which is about 10dB).

Two old designed IF-33 modules are also used to compensate the insertion loss.

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