TPCD-4556 - Bandpass Base Station Duplexer - 400-512 MHz
The Telewave TPCD-4556 duplexer allows simultaneous operation of a transmitter and receiver into a common antenna. This bandpass duplexer has low insertion loss, and is ideal in frequency congested areas where protection is needed from surrounding transmitters, and where maximum transmitter sideband filtering is necessary.
Because of its superior construction, this Telewave 5” cavity duplexer achieves greater rejection of transmitter noise and spurious radiation, providing excellent receiver protection. The TPCD-4556 has three, ¾-wave bandpass cavities in the transmitter and receiver sections. This duplexer is designed for transmitters and receivers with frequency spacing of 5 MHz or more. Selectivity and insertion loss may be adjusted by rotating the calibrated connector loops. Telewave duplexers have ¼-inch aluminum top plates which are fully welded to the aluminum outer conductor.
Silver-plated tuners, beryllium copper finger stock contactors and threaded Invarrods assure maximum temperature stability, higher “Q”, and many years of trouble free operation. All duplexers are tuned and tested with customer-specified frequencies prior to shipping. If frequency changes are required, the positive locking mechanism allows for easy field tuning by rotating the threaded Invar rod.