Improve reliability of communications, eliminate interference with Fiplex Programmable Active...
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www.fiplex.com Eliminate Receiver Interference with Fiplex Programmable Active Crystal Filters* *US Patent Protected
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Improve reliability of your communications with Fiplex Programmable Active Crystal Filters (US Patent Protected). The ACF is installed as a compliment to ground station communication equipment in order to clear the receive spectrum. It is a center frequency programmable filter that provides up to 30dB of rejection to the adjacent channel. Available for simplex systems by using the Fiplex Transmitter Bypass option.
Transcript of Improve reliability of communications, eliminate interference with Fiplex Programmable Active...
www.fiplex.com
Eliminate Receiver Interference with
Fiplex Programmable Active Crystal Filters*
*US Patent Protected
www.fiplex.com
FIPLEX PROGRAMMABLE ACTIVE CRYSTAL FILTER (ACF)*
Aeronautic, VHF and UHF Bands
*US Patent Protected
www.fiplex.com
Are a unique solution to eliminate interference for VHF, UHF and Aeronautic receivers.
This band pass filter connects directly to the receiver and receive antenna, or to the duplexer receiver port.
Programmable Active Crystal Filters*
*US Patent Protected
www.fiplex.com
Why should I use aProgrammable Active Crystal Filter*?
• In order to get better reception, due to the fact that modern receivers are much more sensitive.
• Modern receivers are broadband, which does not allow the use of built-in preselector filters to reduce the overall received noise.
• No spectrum allocation rules are present in VHF and UHF bands, which does not prevent having Tx signals very close in frequency to Rx channels.
• RF spectrum is becoming more and more congested.
All of the aforementioned situations are reasons why receivers get desensed, with the result being overall reception quality degradation, thus reducing the effective coverage area.
*US Patent Protected
www.fiplex.com
FeaturesProgrammable Active Crystal Filter*
• Frequency agile: field tuning via USB without changing hardware.
• Software programmable tuning in steps (3.125KHz for aeronautical, 1.25KHz for VHF and 6.25KHz for UHF)
• 12.5KHz, 25KHz and 50KHz bandwidths available.
• Outstanding rejection: greater than 30dB to adjacent channels and greater than 60dB to semi-adjacent channels (12.5KHz and 25KHz BW), and greater than 22dB to adjacent channels and greater than 47dB to semi-adjacent channels (50KHz BW)
• Single inventory item
• Uninterrupted reception: high linearity and low noise
• No system loss: built-in low noise amplifier (LNA) with user adjustable gain.
• Built-in monitoring system with alarm outputs.
*US Patent Protected
www.fiplex.com
Typical Applications
Active Crystal Filter application at a Repeater site, between the Receiver and the Duplexer
Active Crystal Filter application at a single Receiver, with direct connection to the Rx antenna
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Active Crystal Filter spectrumclean-up
The following picture is the “before and after” spectrum situation. Left diagram is a screenshot of a standard field spectrum measurement, in which the reception signal is marked in green. The diagram on the right is a screenshot of the same spectrum at the output of an Active Crystal Filter. Note how the presence of an Active Crystal Filter provides an outstanding non-desired spectrum rejection, enhancing the overall reception quality and increasing the system coverage area.
www.fiplex.com
ACF Models
Model Frequency Band Channel Filter BW
ACFA1-25 118 – 137 MHz 25 KHz
ACF11-12.5 136 – 150 MHz 12.5 KHz
ACF12-12.5 150 – 174 MHz 12.5 KHz
ACF11-25 136 – 150 MHz 25 KHz
ACF12-25 150 – 174 MHz 25 KHz
ACF41-50 380 – 430 MHz 50 KHz
ACF42-12.5 450 – 470 MHz 12.5 KHz
ACF42-25 450 – 470 MHz 25 KHz
ACF43-12.5 470 – 490 MHz 12.5 KHz
ACF43-25 470 – 490 MHz 25 KHz
www.fiplex.com
TRANSMITTER BYPASS (TXBP)Aeronautic, VHF and UHF Bands
www.fiplex.com
FeaturesTransmitter Bypass (TXBP)
• Allows the use of the Fiplex Active Crystal Filter (ACF) Series in a half duplex and simplex applications, when RF equipment only has a single Tx& Rx antenna connector
• PIN diode based switch, no mechanical parts
• Very fast switching speed, less than 0.3ms
• Low insertion loss
• High Tx/Rx isolation
• Small size
• Ready to be installed with Active Crystal Filters*
• DC and RF cable jumpers included
*US Patent Protected
www.fiplex.com
Typical ApplicationTransmitter Bypass (TXBP)
Tx Bypass (TXBP) and Active Crystal Filter applied together, connected to the RF equipment antenna port
www.fiplex.com
Typical ApplicationTx power ON
When TX power is ON, the Tx Bypass (TXBP) bypasses the Tx signal to the antenna, providing very high isolation to the Active Crystal Filter to avoid damage.
www.fiplex.com
Typical ApplicationTx power OFF – Reception mode
When TX power is OFF, the Tx Bypass (TXBP) connects the Active Crystal Filter to the Rx path, allowing the ACF to provide spectrum filtration and low noise amplification.
www.fiplex.com
TXBP Models
Model Frequency Band Insertion Loss
TXBP-A1 118 - 137 MHz 0.4 dB
TXBP-11 136 - 155 MHz 0.5 dB
TXBP-12 155 - 174 MHz 0.5 dB
TXBP-41 380 - 430 MHz 0.7 dB
TXBP-42 430 - 490 MHz 0.7 dB
TXBP-43 480 - 527 MHz 0.8 dB
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ConnectionActive Crystal Filter* + Transmitter Bypass
*US Patent Protected
www.fiplex.com
Fiplex Communications, Inc.
Headquarters & Distribution Center7331 N.W. 54th Street. Miami, FL 33166. US
Ph: +1 305 884 8991
