External AM and Pulse modulation 50-ohms (Pulse) and 600-ohms (AM) industrial
The 86631B Auxiliary Section Plug-In provides both external AM and Pulse modulation for both the 8660 Series mainframes. This plug-in must be used when another modulation section is not installed. The input impedance is 50-ohms (Pulse) and 600-ohms (AM).





















