Analog Systems
- Helicorder® Model RV-301B
- Helicorder® Amplifier Model AR-320B
- Power Amplifier Model PA-200
- Compact Remote Station Model 45.50
- Seismic Amplifier Model 42.70/PF.70
- Voltage Controlled Oscillator Model 46.32
- Input/Output Module Model IO.40/IO.45
- Calibrator Model PC-120
- 19" Chassis Rack Mount Model 49.03
- Power Supply Model 48.11/48.31
- Discriminator Model 46.12
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| The Helicorder® Amplifier Model AR-320B was designed to work in conjunction with the Helicorder® Model RV-301B. Each amplifier module contains two attenuators, one is continuously variable and the other is variable in 6 dB steps from 0 to 36 dB. The unit operates on 115 Vac, 50/60 Hz, or ±12Vdc. The optional time mark generator has a stability of 1 ppm between 0 and 55 degrees Celsius, and generates hour marks (2 s duration), minute marks (1 s duration) and 10 s marks (0.25 s duration). The AR-320B mounts in a standard 19-inch console. | |
