APPLICATIONS
- Very high attenuation of analog voltage signals
- Acoustic qualification benches
- Analog amplification chain qualification
DESCRIPTION
MEIRI 2657-ATT90 USB box offers analog electronics allowing to attenuate voltage signals until -90dB, with a ±0.1dB accuracy.
Attenuated signal input and output are made thought BNC connectors.
Programming attenuation is set up from the front panel or from a USB plug.
A dashboard on the PC screen enables to set up the attenuator. It can also be programmed by a DLL included with the equipment. Standard model “A” is supplied by mains, version “B” is supplied by rechargeable 15VDC battery.
TECHNICAL FEATURES
TECHNICAL FEATURES| Programmable analog attenuation | From 0 to -90dB |
| No programming | 1 dB |
| Attenuation accuracy | ±0.1dB |
| Input impedance | 1 MΩ |
| Output impedance | 50 Ω |
| Voltage input | ±5V peak (3.535 RMS) V |
| Coupling | AC |
| Bandwidth | 5Hz – 20,000 (at -0.1 dB) Hz |
| Maximum noise | <3µV RMS/√Hz |
| Supply rejection | 120 dB |
| Signal input | BNC connector |
| Signal output | BNC connector |
| USB plug | B type USB connector for standard cable |
| Display | Backlit 16-characters x 2 lines |
| Local command keyboard | 5 keys |
| Zinc-plated housing | DIN 72 x 144; depth 140 mm |
| General configuration | With keyboard on the attenuator |
| Via PC with software (included) |
| By direct writing by DLL |
| Measurement range | Programmable in dB from 0.0 to 90 by 1dB steps |
| Voltage | 85 to 264 VAC; 50-60 Hz |
| Fuse | 1A at the rear, 5x20mm type |
| Supply filter | Schaffner |
| Power | 15W (typical) |
| Max. power | 20W |
| Voltage | 15 VDC |
| Fuse | 1A at the rear, 5x20mm type |
| Power | 4W (typical) |
| Max. power | 20w |
| Autonomy | Approx. 20 hours |
| Operating temperature range | 0 to +50°C |
| Storage temperature range | -10°C to +70°C |
