|
Specification |
| Chopping frequency |
2-slot disc 5Hz - 200Hz |
| 5-slot disc: 12.5Hz - 500Hz |
| 10-slot disc: 25Hz - 1kHz |
| 30-slot disc: 75Hz - 3kHz |
| Phase jitter: |
2-slot disc: 0.6° pk-pk over entire frequency range |
| 5, 10 and 30-slot disc: 1° pk-pk over entire frequency range |
| Frequency selection: |
By multi-turn potentiometer |
| Reference output: |
800mV positive-going wave from 200W. Sensed by IR LED/photodiode mounted on chopping head |
| Display: |
LCD frequency display on free-standing controller turns counting dial on modular unit |
| External control: |
The chopping frequency can be externally control via a front panel socket. Maximum input is = 15V into 20kW. |
| Resolution: |
1Hz with 10-slot disc |
| Motor |
High quality 11-pole dc motor with precious metal commutator |
| Calibration accuracy: |
±1% for setting between 15% and 100% of full scale |
| Variable aperture: |
A variable aperture 2-slot disc is available for non-even mark space modulation |
| Frequency stability: |
Versus temperature: Less than 0.01% change per K
Versus line voltage: Less than 0.01% change results from a change in line voltage from 190V to 265(95V to 130V) |
