Gunn Power Supply with SWR Meter

Gunn Power Supply

• Gunn voltage: - 10 V < U_G < 0 V adjustable via 10-turn potentiometer, short-circuit proof
• Gunn current: max. 200 mA
• Display: 0...10 V, 0...200 mA, LED display for selected scale
• Movement: class 1.5 with mirror scale
• Outputs/inputs:
  - GUNN: DC supply of the Gunn oscillator
  - X/Y: for recording characteristics using an XY recorder
  - DOPPLER OUT: for experiments with Doppler radar
  - MOD IN: for direct modulation of the Gunn oscillator, input
  signal max. ± 10 V

PIN Modulator

• Clock oscillator: 976 Hz, 0...5 V, 0...10 mA, short-circuit proof
• Outputs/inputs:
  - PIN: toggle switch position determines internal modulation 
   through the clock oscillator or for external modulation
  - MOD: for external modulation of the PIN modulator, input 
   signal max ± 10 V

Homodyne SWR Meter

• Principle: Lock-in detection with internal synchronization through the clock oscillator
• Dynamic range: 0...55 dB can be set in 12 steps,
  additional 5 dB available via variable gain
• Sensitivity: 1 µV_rms for full scale deflection
• Accuracy: ± 0.3 dB over the whole range
• Mid-frequency: 976 Hz
• Bandwidth: 10 Hz
• Display:
  - Power scale: + 0.5 dB...- 20 dB (calibrated in dB for square-
  law detectors)
  - SWR scale: 1.00...5
  - Linear scale: 0...100 % (0 dB corresponds to 100 %)
  - Movement: class 1.5 with mirror scale
• Inputs/outputs:
  - INPUT: unbiased, impedance 10 kΩ
  - AMP. OUT: DC output for the measurement voltage

Mod

• Inputs/outputs:
  - Input: jointly for ANALOG and TTL, impedance 50 Ω
  - Analog Out: analog signal max. ± 2 V, bandwidth 1 MHz,
  gain approx. 30
  - TTL Out: TTL level
  - All in-/outputs are connected with BNC sockets
• Mains connect.: 115/230 V, 50 Hz, approx. 20 VA with mains connection cable and earthing-pin plug
• Dimensions: 500 x 330 x 150 mm (L x W x H)
• Weight: approx. 8 kg