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Monitor Sync Unit (MSU)

For Research Only – Not For Human Use

The Monitor Sync Unit (MSU) provides a real-time TTL triggering pulse to the Experiment Control Module (ECM) for synchronization of visual stimulus to electrophysiological recording.

Catalog Number:


Research Application:


User Profession:

Technical Details:
  • Optical Sensor: Hamamatsu S6429-01 photodiode
  • Peak Sensitivity: 0.27 A/W (photodiode), 0.27 V/μW (MSU)
  • Spectral Response: (from Hamamatsu photodiode data sheet)
  • Dark Current: 0.02nA
  • Input Capacitance: 250 pF total  (200 pF photodiode + 50 pF MSU)
  • Detection Threshold Voltage Range: 0 to 2.38V or 0 to 8.8 μW
  • Delay Range: 0.1 ms   to 21 ms
  • Output Pulse Width Range: 0.1 ms to 21 ms
  • Output Voltage: 5V TTL, normal/inverted – jumper selectable.
  • Case: Anodized Aluminum, (analog common), 4 rubber feet.
  • Output Cable: Shielded, DB37M-M, 1.0cm dia.  3m (10’)  (other lengths available).
Ordering Information:

Product number: 55-50-3

Product Sizes:


  • Height: 1.69in (4.3cm)
  • Width:  3.07in (7.8cm)
  • Length: 4.84in (12.3cm)
  • Weight: 265g (without cables)

MSU – Monitor Sync Unit