Description
Model 75P-223 is a 75 Ohm solid-state programmable attenuator with attenuation range 0 to 63.75dB by 0.25dB steps. It operates 5-2150 MHz and is rated for +23 dBm of RF input power. This step attenuator is available with 75 Ohm BNC, F or N female RF connectors. The attenuator has seven individually controlled attenuation steps: 0.25dB, 0.5dB, 1dB, 2dB, 4dB, 8dB, 16dB and 32dB.
TTL Control
Each of the attenuation steps has a corresponding TTL control line. See the outline drawing for the control pinout. TTL high will turn on an attenuation step. TTL low will turn off an attenuation step. Use multiple control lines simultaneously to set combinational attenuation values. To activate the 7.25dB setting, the 0.25dB/1dB/2dB/4dB control lines must all be TTL high. To activate the 17dB setting, the 1dB/16dB control lines must be TTL high. To set the attenuator to the insertion loss state (i.e. 0dB setting), all control lines must be set to TTL low.
