Quantic PMI Model FD-70M-50M-1212-50OHMS is a Frequency Discriminator that operates at a center frequency of 70 MHz. It has a peak bandwidth of 90 MHz and a linear bandwidth of 50 MHz minimum. With a dynamic range of -10 to 0 dBm, the sensitivity into a 50 Ω load is 100 mV/MHz. This unit offers a maximum rise time of 50 ns and size of 4.625" x 1.50" x 0.47". https://www.quanticpmi.com/product-details/fd-70m-50m-1212-50ohms