Frequently Asked Questions (FAQ)
for Programmable Attenuators
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1) What are the pros and cons of solid-state versus relay programmable attenuators?
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| Solid-State Pros | Relay Pros | | Typical MTBF = 250,000 hours | Wide frequency range (works at DC) | | Excellent attenuation repeatability | Higher input power | | Switching speed (microseconds) | Low harmonic distortion | | Solid-State Cons | Relay Cons | | Increased harmonic distortion | Switching speed (milliseconds) | | Lower input power | (1 million operations per relay typical) |
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| 2) Can I use a solid-state programmable attenuator to perform handover or signal fading simulation? |
| Yes. JFW supplies programmable attenuators and handover test systems to network providers performing fading simulations of cell phone signals. |
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| 3) Are the programmable attenuators bi-directional? |
| All of JFW's programmable attenuators are bi-directional unless noted differently on the specification sheet. |
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| 4) I need a custom programmable attenuator designed. How much are your typical NREs (non-recurring engineering charge)? |
| JFW does not charge NREs. Please send your custom requirement to sales@jfwindustries.com. |
