The WiNRADiO WR-UBF-1800 Universal Broadcast Filter combines three functions in one package: An FM broadcast (88-108 MHz) band-reject filter, AM broadcast (0-1.75 MHz) band-reject filter, and a 20 dB attenuator. These functions (one at a time) are selectable by the user at installation time.
Simplicity of installation, low insertion loss and wide-band operation make this product suitable for VHF/UHF receivers up to 1.8 GHz, where suppression of broadcast bands is required in order to eliminate intermodulation inteference from strong local stations.
The WiNRADiO WR-UBF-1800 Universal Broadcast Filter is based on high performance multiple-stage passive filters, optimized for rejection of FM or AM broadcast bands. The product is especially suitable for use with WiNRADiO G3 series VHF/UHF receivers, such as WR-G305i, WR-G305e, WR-G315i and WR-G315e models. It can be also used with any third-party receivers.
• Three functions in one device
• Wide frequency range operation
• Flat pass band
• Low insertion loss
• High suppression of broadcast bands
• Rugged weatherproof construction
• Simple installation
The WiNRADiO WR-UBF-1800 Universal Broadcast Filter should be inserted between the antenna and the receiver using SMA connectors and a suitable coaxial cable. To select one of the three functions of the Universal Broadcast Filter, the bottom cover is removed, which will reveal three sets of jumpers used to select the desired functionality.
To select one of the three functions, the jumpers in both groups need to be set to the same position, as per the adjacent table. For example, if the FM brodacast filter is to be selected, jumpers have to be fitted in the FMF positions in both jumper groups. Jumper Marking
HPF AM filter (high pass filter)
FMF FM filter (notch filter)
• Frequency range 9 kHz-1.8 GHz
• Impedance (in/out) 50 Ohm
• Connectors (in/out) SMA
• FM reject (notch) filter
• Insertion loss 0.5 db @ 200 MHZ
• Reject band 88 MHZ – 108 MHz
• Triple-section resonant trap
• Attenuation >45 dB @ 98 MHz
• AM reject (high pass) filter
• Insertion loss 0.4 dB @ 10 MHz
• Cut off frequency 1.75 MHz @ 3 dB
• 7-Section high pass
• Attenuation >75db @ 0.5 MHz
• Attenuation 20 db