Fixed RF attenuators – 75 ohms, BNC and DC to 4 GHz: BM10020 series | Bracke Manufacturing
Bracke BM10020 fixed 75-ohm BNC attenuators with a 2 W power rating, DC to 4 GHz operation and fixed attenuation values from 1 to 30 dB.
The Bracke BM10020 series consists of fixed coaxial RF attenuators for 75-ohm signal paths with a BNC interface. All models cover a frequency range from DC to 4 GHz and have a specified power rating of 2 W.
The product series is available with fixed attenuation values of 1, 2, 3, 6, 10, 20 and 30 dB. Model-specific attenuation accuracy ranges from ±0.3 to ±0.75 dB. A maximum VSWR of 1.35:1 is specified for all listed versions.
Advantages
- 75-ohm system impedance: For compatible coaxial RF signal paths and measurement chains.
- Frequency range from DC to 4 GHz: Common specified frequency coverage across all models.
- Seven fixed attenuation values: Choice of 1, 2, 3, 6, 10, 20 or 30 dB.
- 2 W power rating: Common specified RF power across the series.
- Defined attenuation accuracy: Model-specific values from ±0.3 to ±0.75 dB.
- Consistent maximum VSWR: 1.35:1 for all listed references.
Key features
- Product type: Fixed coaxial RF attenuator
- Manufacturer: Bracke Manufacturing
- Product series: BM10020
- Impedance: 75 ohms
- Interface: BNC
- Frequency range: DC to 4 GHz
- Power rating: 2 W
- Attenuation values: 1, 2, 3, 6, 10, 20 and 30 dB
- Attenuation accuracy: ±0.3 to ±0.75 dB, depending on the model
- Maximum VSWR: 1.35:1
Typical applications
- Defined signal-level reduction in coaxial 75-ohm signal paths
- Level adjustment between signal sources, components and measurement instruments
- RF measurement and test setups up to 4 GHz
- Integration into laboratory, development and production environments
- Testing and characterisation of 75-ohm RF components and assemblies
- Signal conditioning in systems using BNC interfaces
Additional information
The appropriate BM10020 reference is selected according to the required attenuation value and permitted attenuation deviation. EMCO supports the technical selection of the appropriate model and its positioning within the complete 75-ohm measurement or system chain.
Model comparison
| Reference | Attenuation | Attenuation accuracy | Frequency range | Power rating | Max. VSWR |
|---|---|---|---|---|---|
| BM10020.1 | 1 dB | ±0.3 dB | DC to 4 GHz | 2 W | 1.35:1 |
| BM10020.2 | 2 dB | ±0.3 dB | DC to 4 GHz | 2 W | 1.35:1 |
| BM10020.3 | 3 dB | ±0.3 dB | DC to 4 GHz | 2 W | 1.35:1 |
| BM10020.6 | 6 dB | ±0.3 dB | DC to 4 GHz | 2 W | 1.35:1 |
| BM10020.10 | 10 dB | ±0.5 dB | DC to 4 GHz | 2 W | 1.35:1 |
| BM10020.20 | 20 dB | ±0.5 dB | DC to 4 GHz | 2 W | 1.35:1 |
| BM10020.30 | 30 dB | ±0.75 dB | DC to 4 GHz | 2 W | 1.35:1 |
