75 Ohm Solid-State Programmable Attenuators

A programmable attenuator is a variable attenuator with a specific dB step size and total attenuation.  All of the models in this table are 75 Ohm impedance with solid-state design.  The attenuation steps are controlled via parallel TTL control lines.  JFW has been designing, manufacturing, and delivering programmable attenuators for over 25 years.  For your specific application, please contact JFW for assistance.

Solid-State Design

These attenuator models all have a solid-state design which allows for switching speeds in the microseconds.  With no moving parts, these solid-state step attenuators are perfect for automated RF testing.  The attenuators have typical MTBF of 250,000 hours and excellent attenuation repeatability.

TTL Control

The models listed in the table have parallel TTL lines for the attenuator control lines.  There is a TTL line for each attenuation step.  Activate multiple dB steps simultaneously to set combination attenuation values.  Example: to achieve 6dB of total attenuation activate the 2dB/4dB steps simultaneously.

Frequently Asked Questions for Programmable Attenuators

JFW Model #	dB Total	dB Step	Frequency Start	Frequency Stop	Switching Speed	RF Input Power	Control	RF Connectors
75P-173	127 dB	1 dB	450 MHz	2150 MHz	2 uS	+20 dBm	TTL	BNC, F, N
75P-176	127 dB	1 dB	50 MHz	1000 MHz	2 uS	+10 dBm	TTL	BNC, F, N
75P-177	127 dB	1 dB	50 MHz	2000 MHz	2 uS	+10 dBm	TTL	F
75P-217	95 dB	1 dB	5 MHz	2150 MHz	2 uS	+23 dBm	TTL	F Female
75P-223	63.75 dB	0.25 dB	5 MHz	2150 MHz	2 uS	+23 dBm	TTL	BNC, F, N