Product Description
Shure A15RF In-Line Radio Frequency Attenuator - XLRF to XLRM
In-line RF interference attenuator reduces interference from AM radio stations that may bleed into microphone lines when using long cables.
The Shure A15RF In-Line RF Attenuator provides all types of balanced audio systems with greatly improved immunity to radio frequency interference (RFI). It is especially useful in applications where balanced audio devices near strong RFI sources, such as AM radio stations, are connected by long cable runs.
The A15RF will not degrade system sound quality or alter system frequency response. In cases where interference is present but not audible, the A15RF can improve perceived sound quality by removing low level interference components from the audio signal path. It passes phantom power and is transparent to differential audio signals ranging from DC to 2 GHz.
The A15RF is a passive device and will not damage other equipment. It does not present any additional load to the signal sources, and can be used with phantom-powered mic-level or line-level devices.
General Description
The Shure Model A15RF In-Line RF Attenuator provides all types of balanced audio systems with greatly improved immunity to radio frequency interference (RFI). It is especially useful in applications where balanced audio devices near strong RFI sources, such as AM radio stations, are connected by long cable runs.
The A15RF will not degrade system sound quality or alter system frequency response. In cases where interference is present but not audible, the A15RF can improve perceived sound quality by removing low level interference components from the audio signal path. It passes phantom power and is transparent to differential audio signals ranging from DC to 2 GHz.
The A15RF is a passive device and will not damage other equipment. It does not present any additional load to the signal sources, and can be used with phantom-powered mic-level or line-level devices.
Installation
For best results, connect an A15RF between the cable and the affected device. If interference remains audible, install the A15RF at the other end of the cable, or place one A15RF at each end of the cable. In extremely severe cases, connect two or more A15R attenuators in series. If the problem persists, replace the cable and check for faulty or unbalanced connections.
Specifications
Attenuation
| Common Mode Attenuation | 50 Ω In/Out |
| Differential Mode Attenuation | 50 Ω In/Out |
Maximum Operating DC Current Rating
20 mA maximum
Impedance
0.4 Ω
Operating Temperature Range
-40° to +85° C (-40° to 185° F)
Housing
Full magnetic shield; steel with black chrome plating
Dimensions
19 mm(.75 in.) diameter; 69.85 mm (2.75 in.) long
RFI Attenuation
Common Mode Attenuation
Differential Mode Attenuation
