Antronix DPA85-102 is a 75-ohm mid-split diplex filter designed to separate upstream and downstream frequency bands in cable broadband systems. Its LOW port passes 5–85 MHz upstream signals, while its HIGH port passes 102–1218 MHz downstream signals. Low insertion loss helps preserve signal strength, and a minimum of 45 dB of isolation between the bands supports reliable two-way communication.
The DPA85-102 features SCTE-compliant ECT F-ports, a corrosion-resistant tin-plated zinc-alloy housing, and a fully soldered backplate for RFI shielding. A 15 psi pressure seal helps resist water ingress, while integrated mounting tabs and a heavy-duty ground block support straightforward installation. Designed for operation from −40°C to +60°C, the filter also provides 6 kV ring-wave surge withstand capability and corrosion resistance tested to ANSI/SCTE-143 for 1,000 hours of salt-spray exposure.