Singer NM-65T Radio Interference Analyzer/Reciever
Iowa Dual Pulse Generator and Voltage Clamp Channel Module.
Melles Griot, diode Laser Driver with automatic power control (APC), and an ac-to-dc wall-plug power converter
The SR540 chopper will handle all your optical chopping requirements—from simple measurements to dual-beam and intermodulation experiments. The SR540 has a 4-digit frequency display, ront-panel frequency control, analog voltage frequency control and two reference outputs with selectable operating modes,Chop frequency: 4 Hz to 400 Hz(5/6 slot), 400 Hz to 3.7 kHz(25/30 slot)