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Summary of Contents for Forssell Technologies MADC-2
- Page 1 F(t) Forssell Technologies Inc MADC-2 Two Channel Discrete JFET Analog to Digital Converter MADC-4 Four Channel Discrete JFET Analog to Digital Converter User’s Manual Forssell Technologies Inc 235 Wild Horse Trail, Sandpoint, ID 83864 208-263-0286...
- Page 2 Digital “clipping” is indicated with a single front panel LED that latches on until the “reset” switch is pressed. The MADC-2 analog circuitry features an all Class A discrete JFET with no IC opamps used in the signal path. The analog inputs use high quality XLR connectors. The digital outputs provided are AES3 (XLR), SPDIF (RCA), and Word Clock output (BNC) are provided.
- Page 3 “Over” LED: The front panel mounted red “Over” LED lights when any channel reaches a digital signal level that is within 0.1 dB of digital full scale for more than two sample periods. Once lighted, the over LED will remain lighted until the “reset” switch is press. The reset switch only effects the Over LED and does not reset the converter digital circuitry nor does it change the sample rate back to power up defaults.
- Page 4 Changing the line voltage from the factory setting requires a change to the AC line fuse which is located within the AC power entry module on the rear panel. You must use one of the following fuse values… MADC-2 115 VAC use 160 milliamp TD fuse. 230 VAC use 80 milliamp TD fuse.
- Page 5 -100 -105 -110 -115 -120 -125 -130 -135 -140 -145 -150 -155 -160 A-D FFT.at2c AD FFT (linear scale) with 0 dBu 5 KHz input (-18 dBFs digital output). -100 -105 -110 -115 -120 -125 -130 -135 -140 -145 -150 -155 -160 A-D FFT.at2c...
- Page 6 -100 -105 -110 -115 -120 -125 -130 -135 -140 -145 -150 -155 -160 2.5k 7.5k 12.5k 17.5k 22.5k 27.5k 32.5k 37.5k 42.5k 47.5k A-D FFT Dual Freq.at2c AD FFT (linear scale) with dual frequency (19 and 19.5 KHz) 0 dBu signal -100 -105 -110...
- Page 7 +0.8 +0.6 +0.4 +0.2 -0.2 -0.4 -0.6 -0.8 -1.2 -1.4 -1.6 -1.8 -2.2 -2.4 -2.6 -2.8 A-D FREQ RESP.at2c AD High Frequency Response at 44.1k, 48k, 88.2k, and 96k. (96k is the limit of the test equipment) +2.8 +2.6 +2.4 +2.2 +1.8 +1.6...
- Page 8 -2.2 -115 -2.4 -120 -2.6 -125 -2.8 -130 -110 -100 A-D LINEARITY2.at2c Deviation from Linearity (Right scale) from 0 dBFs to –130 dBFs Output Contact Information: Forssell Technologies Inc 235 Wild Horse Trail Sandpoint, ID 83864 USA 208-263-0286 www.forsselltech.com info@forsselltech.com...
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