Attenuators

ATTENUATORS PRODUCTS

JFW’s 50P-2103 SMA is a programmable attenuator designed with USB control, making it ideal for R&D labs or other flexible test environments. It covers the 0.1 – 18 GHz frequency range, and it has a 0 – 65 dB attenuation range by 0.5 dB steps.

JFW offers the 75P-223 solid state programmable attenuator for applications operating over the 5 to 2150 MHz range with 0 to 63.75 dB attenuation by 0.25 dB steps.

The TS05XX Series chip attenuator is designed with increased power handling and requalified to higher power levels. The increased power handling capability is based on individual device attenuation values as follows: 0-1 dB attenuators are rated at 5 W, 2-3 dB rated at 2 W, 4-10 dB rated at 1 W, and 11-20 dB rated at 0.75 Watts.  It can be used for mobile networks, broadcast, high power amplifier, military, and instrumentation applications.

JFW’s Model 75PA-113-XX is a 19-inch rack mount attenuator system with 1 to 16 75 Ohm solid-state step attenuators. Featuring an attenuation range of 0 to 95 dB by 1 dB increments and 75 Ohms nominal impedance, the system is perfect for DOCSIS and CATV automated RF testing applications in the 5 - 150 MHz range.

The 50FH-XXX-50-3 from JFW is a 50 Ohm coaxial fixed attenuator rated at 50 Watts maximum RF input power that operates DC-3000 MHz. The connector is available with dB values ranging from 1 dB to 50 dB, and the heatsink has mounting holes on both ends and on the bottom side. Mixed RF connectors, such as 4.3/10 male or N female, are made available.

JFW’s Model 75P-217 is a solid-state programmable attenuator system featuring an attenuation range of 0 to 95 dB by 1 dB increments and a 5 to 2150 MHz frequency range. With 75 Ohm BNC, F or N female RF connectors, the attenuator has seven individually controlled attenuation steps:  1 dB, 2 dB, 4 dB, 8 dB, 16 dB, 32 dB and 32 dB.

The 50PA-1174-XX series is composed of 19 inch rack mount attenuator assembles containing 50 Ohm solid-state step attenuators. The number of attenuators can be selected from 1 to 8 attenuators. The attenuators have an attenuation range of 0 to 63 dB by 0.5 dB steps and operate at 200 MHz to 8 GHz. 

JFW offers the 50PA-1068 modular attenuator assembly designed to be connected to up to a maximum of 8 RF modules and operate within the 200 to 6000 MHz frequency range. The RF modules contain individually controlled programmable attenuators with attenuation range 0-95 dB x 1 dB steps. 

ABOUT

Attenuators

Attenuators are the exact opposite of an amplifier. It is used to reduce the intensity of either electricity or sound. For example the digital impulse that is used to drive a speaker may be stepped down to prevent the lower range speakers from failing. An equalizer in music is a form of amplifier and attenuator rolled up into one. It however targets on particular frequency. Every instrument in a musical symphony and even the human voice occupy a certain frequency range. Each not of a violin for example has a very specific frequency. The A string on a violin is exactly 440Hz. Using an attenuator, one can target the exact frequency of 440Hz and reduce its intensity. It can even be attenuated all the way down to zero. If this were to happen then every time an A not of a violin was played, it would not be heard.

This sort of technology is used to clean up sounds of recordings and other sounds in a recording. It is even possible to pin point the frequency range of the human voice then use an attenuator to reduce it to zero. Imagine if one were to take a recording of a song and attenuate just the vocal portion, the song will now resemble a minus one track.

Attenuators have other more sophisticated commercial uses. The can be used to reduce the electrical impulses that were amplified to travel long distances and may still carry strong energy when it arrives, so it needs to be attenuated before it is channeled for processing.