Details
It has been tested as seen in the pictures.
It has a loud fan.
Original Manufacturer Description:
The Marconi 2440 is a frequency counter intended primarily for microwave use but offering continuous frequency measurement over the range of 10 Hz to 20 GHz. The frequency cover is divided between three input channels. The unit has wide FM tolerance and short signal acquisition times.
- Frequency Range 10 Hz to 20 GHz
- Sensitivity: -15dBm
- Accuracy: 5x10^-10/day
- Channels: 3
- Digits: 8
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