WISCO international (Telewave- Duplexers/ TPRD-4544 / 4744)

The TELEWAVE TPRD-4544/4744 Base Station Duplexers set an all-time standard for the LMR industry. By using two TPRC-4504 or 4704 Bandpass/Band-Reject cavities in each transmitter and receiver path, these duplexers provide maximum TX to RX protection in the most severe RF environments. The unique design of the Bandpass/Band-Reject duplexer provides a bandpass characteristic with minimum insertion loss, while also providing maximum TX to RX protection.

ADVANTAGES

Bandpass Characteristics
� 19� Panel Mount
Adjustable Insertion Loss
Adjustable TX to RX Protection
Adjustable coupling to match the required attenuation for ideal RX performance.
All cavity inputs are electrically shorted to ground for maximum static and noise protection.
RG-214 Mil-Spec cable is used for all interconnections to ensure long life, and lowest insertion loss with maximum power handling capability.

Heavy-duty materials are used in construction of this duplexer, including silver-plated tuners and beryllium copper fingerstock contactors, assuring high-Q performance with no problems due to dissimilar metals. Tuning is simple and remains stable from -30C to +70C, thanks to the threaded Invar rod.
With specified frequencies, all duplexers are pre-tuned and tested prior to shipping from the factory. No further adjustments should be required. The positive locking mechanism allows for easy field tuning if frequency changes are implemented.

The TPRD-4544/4744 duplexers mount on a 19� standard rack, with panel height of 5.25�. Power handling is 250 watts. Receiver desense protection is at least 90 dB, and TX sideband suppression is at least 75dB, making these duplexers ideal for all base stations.
With TX to RX spacing of 3 MHz or more, this duplexer can combine two transmitters into one antenna, or feed two receivers.

ELECTRICAL
Model	TPRD-4544	TPRD-4744
Frequency Range	400-470 MHz	470-512 MHz
Frequency Separation (min)	5 MHz or more	3 MHz or more
Max Power Input	250 Watts
Insertion Loss TX and RX to Ant	1.0 dB
TX noise suppression at RX freq.	90 dB
RX attenuation at TX freq.	90 dB
Isolation (Minimum) TX to RX 5 MHz Separation 3 MHz Separation	75 dB 60 dB
Maximum VSWR	1.2 to 1
Temperature Range	-30�C to +70�C

MECHANICAL	TPRD-4544	TPRD-4744
Number of cavities	4
Cavity diameter in.	4
Dimensions in (cm) (HWD)	5.25 x 19 x 10.5 (13.3 x 48 x 26.7)
Mounting	9� panel
Connector Termination	Type N Female
Finish	Acrylic Enamel
Net Weight lb (kg)	21 (9.5)
Shipping Weight lb (kg)	26 (11.8)