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In this episode Shahriar attempts to repair an Anritsu MG3700A Vector Signal Generator. The instrument does not fully power on and suffers from several problems. The digital IF board as well as the main computer are presented. The power-on fault is traced to a faulty fuse on the 5V power supply which feeds the main CPU board. A new fuse enables the instrument to fully boot. The unit also exhibits a failure for all signals above 3GHz. The instrument is equipped with a super hetrodyne mixer board which covers 3GHz - 6GHz output range. This RF board is examined and explored in details alongside the block diagram of the unit. The fault is traced to a unidentifiable component (potentially PIN diode switches). Bypassing these components allows the instrument to generate sufficient power. However, the repair must stop here for now until these parts can be identified. www.TheSignalPath.com    / thesignalpath​​​   www.Patreon.com/TheSignalPath