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Instruction Manual for XIEGU models including: GNR1, Digital Audio Noise Filter, Audio Noise Filter, Noise Filter
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DocumentDocumentXIEGU Digital Audio Noise Filter GNR1 Operang Instrucon Version 1.0 Dec 2021 VISIT RADIODDITY.COM FOR DOWNLOADS AND HELP 01 I. Introducon GNR1 digital audio noise filter is an audio processing device integrang digital noise reducon and digital filtering. It can be widely used in the external audio processing sector of all types of wireless receiving equipment such as radio transceiver, receiver, radio, to effecvely reduce the background noise, improve the signal-to-noise rao, and improve the signal idenfiable degree. GNR1 supports to connect external passive speaker, which can provide 3W audio output power; support independent adjustment of input/output sound volume; support selecon of high/low input impedance; support audio double output ports (3.5mm stereo output, RCA output); support headphone output and automac switch of headphone/speaker output. II. Basic Indicators Digital denoiser SNR upgrade degree More than 22dB L-CUT adjustment range 5Hz-1280Hz Digital filter frequency response range H-CUT adjustment range 500Hz-5615Hz Headphone driving power 100mW@Max Headphone output impedance 16~64 Input impedance range Low impedance of 16, Speaker output power high impedance of 10k 3W (8, THD0.2%) Speaker output impedance 4~16 Operang voltage DC12V:t15% Volume 159*44*143mm VISIT RADIODDITY.COM FOR DOWNLOADS AND HELP 02 III. Operang Instrucon 3.1 Descripon of Panel Front panel Input overload indictor Power indicator NR adjustment L/H-CUT adjustment Input/ Output sound volume adjustment Power switch Headphone interface Rear panel Input impedance selecon RCA output interface Input interface 3.5mm stereo output interface DC power input VISIT RADIODDITY.COM FOR DOWNLOADS AND HELP 03 3.1.1 Wiring The input is a mono channel, and its interface is a 3.5mm stereo jack. Two tracks are connected by the internal wiring. Do not use the mono channel jack, or you will cause a short circuit and no sound to the input! The output is also a mono channel, with two jacks: RCA jack, 3.5mm stereo jack. This stereo interface also connects two channels in the device. Do not use the mono channel jack, or you will cause a short circuit and no sound to the output! The external power is DC 12V ± 15%, you can directly use the 13.8V power of the radio equipment to supply power for this. Do not use it under over-voltage! Do not directly power with 220VAC! 3.1.2 Selecon of input impedance Reasonably select the high/low input impedance level for GNR1 according to the audio output impedance of the device you are using. You may turn down the output sound volume if you select it improperly. 3.1.3 Adjustment of input sound volume You can adjust to the appropriate sound volume to keep a proper output sound volume and distoronless sound quality. You can adjust it in cooperaon with the output sound volume. If the input audio amplitude is so high that the input is overloaded, the CLIP indicator on the panel will be on, so you should turn down the input sound volume at this me. 3.1.4 Adjustment of output sound volume The knob controls the output sound volume of the speaker and headphone. You can adjust to an appropriate output sound volume without distoronless sound quality. If you need to use headphones to monitor the output, it is recommended to turn the knob le to the lowest sound volume, and then insert the headphones to avoid damage to your hearing due to too loud sound. After inserting the headphone, the speaker output will be automatically cut off. VISIT RADIODDITY.COM FOR DOWNLOADS AND HELP 04 3.1.5 NR noise reducon adjustment This knob controls the NR noise reducon switch, and the 200-level noise reducon degree. Turn le to the end to turn off the NR. Turn to right to turn on NR noise reducon and increase the noise reducon degree by levels. NR noise reduction will cause slight volume loss, so please reasonably adjust the noise reduction degree to get a comfortable listening experience. 3.1.6 Adjustment of the digital filter The digital filter can be adjusted by L and R, indicang the L-CUT low cut and H-CUT high cut adjustment. Turn the L knob le to the end, and the L-CUT low cut will be turned off. Turn the H knob right to the end, and the H-CUT high cut will be turned off. VISIT RADIODDITY.COM FOR DOWNLOADS AND HELP 05 Schemac Diagram of Filter Composion Actual filter bandwidth Low cut boundary High cut boundary f Audio frequency 5Hz Center frequency 5615Hz piont As shown in the figure on the right, the filter consists of L-CUT and H-CUT, and both work together to form an effecve filter bandwidth. L-CUT controls the low boundary frequency, which can effecvely cut off the low-frequency component; H-CUT controls the low boundary frequency, which can effecvely cut off the high-frequency component; In daily use, adjust according to your own listening preferences, subject to geng the best listening effect. Note: If the actual bandwidth of the filter is less than the useful bandwidth of the useful signal,