Pushbutton RF attenuators – BNC female, 50 and 75 ohms: BM10040 - BM10045 | Bracke Manufacturing
Bracke BM10040 to BM10045 pushbutton RF attenuators with BNC female connectors, 50 or 75 ohms, frequencies up to 750 MHz and attenuation ranges up to 102 dB.
The BM10040 to BM10045 models are manually adjustable coaxial RF attenuators featuring pushbutton operation and BNC female connectors. The product family includes versions for both 50-ohm and 75-ohm signal paths.
The BM10040 to BM10043 50-ohm models are specified for frequencies up to 750 MHz. They provide attenuation ranges up to 102 dB with step sizes of 0.5 or 1 dB. The BM10044 and BM10045 75-ohm models operate up to 500 MHz and provide attenuation ranges up to 65 and 45.5 dB respectively.
Advantages
- Manual pushbutton adjustment: Direct selection of the required attenuation using defined steps.
- 50- and 75-ohm versions: Models for different coaxial system impedances.
- Attenuation ranges up to 102 dB: Selection according to the required adjustment range.
- Step sizes of 0.5 or 1 dB: Resolution according to the measurement requirement.
- BNC female connectors: Common interface across all listed models.
- Defined attenuation accuracy: Model-specific specifications for each adjustment range.
Key features
- Product type: Manually adjustable pushbutton RF attenuator
- References: BM10040, BM10041, BM10042, BM10043, BM10044 and BM10045
- Connector: BNC female
- Impedance: 50 or 75 ohms, depending on the model
- Maximum frequency: 750 MHz for 50-ohm models or 500 MHz for 75-ohm models
- Attenuation range: Model-dependent, up to 102 dB
- Step size: 0.5 or 1 dB
- Attenuation accuracy: Model-dependent, from ±0.3 dB or 1% to ±1.3 dB
- Power rating: Not specified in the provided information.
- VSWR: Not specified in the provided information.
Typical applications
- Manual adjustment of defined attenuation values in coaxial 50- or 75-ohm signal paths
- Step-by-step signal-level variation in RF measurement and test setups
- Comparative measurements requiring repeatable manual attenuation settings
- Laboratory and development setups using BNC interfaces
- Signal attenuation in measurement chains up to 500 or 750 MHz
Additional information
The appropriate model is selected first according to the required system impedance of 50 or 75 ohms. Further selection criteria include the required attenuation range, the desired step size of 0.5 or 1 dB and the specified attenuation accuracy.
EMCO supports the technical selection of an appropriate pushbutton attenuator for the relevant RF measurement or test configuration.
Model comparison
| Reference | Impedance | Connector | Max. frequency | Attenuation range | Step size | Attenuation accuracy |
|---|---|---|---|---|---|---|
| BM10040 | 50 ohms | BNC female | 750 MHz | 0 to 65 dB | 1 dB | ±1.3 dB |
| BM10041 | 50 ohms | BNC female | 750 MHz | 0 to 45.5 dB | 0.5 dB | ±0.75 dB |
| BM10042 | 50 ohms | BNC female | 750 MHz | 0 to 102 dB | 1 dB | ±0.3 dB or 1% |
| BM10043 | 50 ohms | BNC female | 750 MHz | 0 to 82.5 dB | 0.5 dB | ±0.3 dB or 1% |
| BM10044 | 75 ohms | BNC female | 500 MHz | 0 to 65 dB | 1 dB | ±0.8 dB |
| BM10045 | 75 ohms | BNC female | 500 MHz | 0 to 45.5 dB | 0.5 dB | ±0.5 dB |
