The Micro1401 is expanded by similar format cases that are fixed on top of the main case, with hidden internal electrical links.

64 more waveform inputs - the ADC64

Usable for Micro1401-3 or Micro1401-4.  Fit two units for 128 channels.

For large numbers of channels, an additional 64 differential channels are available with this 3701-64 top box. There is not room for 64 BNCs on the front, so there are mass termination sockets on the back. Two of these top boxes may be fitted, giving a maximum of 128 channels of waveform input.

The electrical characteristics of these inputs are the same as those of the base four. The common mode rejection is 75 db and the maximum sampling rate is slower, at 400 kHz for the ±5 V setting, instead of 500 kHz, and 200 kHz for the ±10 V setting.

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