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Forssell Technologies MADA-2, User Manual

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Forssell Technologies MADA-2 User Manual Download Page 6

 DAC Measurements 

 

D-A FFT HiRes Stereo.at2c

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DA FFT (linear scale) of 2 KHz signal at 0 dBu output level with a 600 load. Red = Ch1 Blue= Ch2 
 
 

D-A FFT HiRes Stereo.at2c

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DA FFT (log scale)  2 KHz signal at 0 dBu output level with a 600 load. Red = Ch1 Blue= Ch2 
 

Summary of Contents for MADA-2

Page 1: ...F t Forssell Technologies Inc MADA 2 2 Channel Analog to Digital and Digital to Analog Converter User Manual 72311 ...

Page 2: ...DA 2 digital output word length is fixed at 24 bits The MADA 2 uses a 32 bit asynchronous decimation filter to provide various standard output sample rates from 44 1K to 192k The actual low jitter sampling clock that controls the AD converter chip timing is permanently set to sample at 196 3 kFs regardless of output sampling rate selection This process is called Asynchronous Sample Rate Conversion...

Page 3: ...connectors are wired for pin 2 input and pin 3 input signal polarities The input impedance of analog inputs is approximately 3k ohm balanced Level Calibration Unless otherwise requested when your unit was ordered the MADA 2 is calibrated so that a 0 775 mv dBu analog input level produces 18 dBFs digital output level There are four sets of jumpers located on the MADA board inside the MADA 2 that wi...

Page 4: ...ke the signal between pin 2 hot and pin 3 cold of the input XLR Pin 1 can be connected to either of these pins if desired Connecting pin 1 to pin 2 will produce an output signal that is out of phase so normally pin 1 is connected to pin 3 for single ended loads Pin 1 can be left floating too MADA 2 Specifications ADC specifications Sample Rates available 44 1k 48k 88 2k 96k 176 4k and 192k Level C...

Page 5: ... 1Khz 18 dBu input output 0 dBFS IMD SMPTE 0 002 with 0 dBu input output 18 dBFs IMD SMPTE 0 05 with 18 dBu input output 0 dBFs General Specifications Power consumption 14 watts 120 VAC AC Line Voltage range 110 to 125 VAC and 220 to 250 VAC 50 or 60 Hz AC Line Voltage The MADA come preset for either 115 VAC or 230 VAC 50 60 Hz operation as indicted by a rear panel label The line voltage is select...

Page 6: ... 18k 20k 22k 24k 26k 28k 30k Hz DA FFT linear scale of 2 KHz signal at 0 dBu output level with a 600 load Red Ch1 Blue Ch2 D A FFT HiRes Stereo at2c 140 0 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 20 30k 50 100 200 500 1k 2k 5k 10k 20k Hz DA FFT log scale 2 KHz signal at 0 dBu output level with a 600 load Red Ch1 Blue Ch2 ...

Page 7: ...8k 20k 22k 24k 26k 28k 30k Hz DA FFT linear scale 2 KHz signal at 100 dBu output level Red Ch1 Blue Ch2 D A FFT HiRes Stereo at2c 140 0 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 20 30k 50 100 200 500 1k 2k 5k 10k 20k Hz DA FFT log scale of 2 KHz signal at 100 dBu output level with a 600 load Red Ch1 Blue Ch2 ...

Page 8: ...16k 18k 20k 22k 24k 26k 28k 30k Hz DA FFT linear scale of Dual Freq 19 and 19 5 KHz signal at 0 dBu Output Level D A FFT HiRes Stereo dual freq at2c 140 0 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 20 30k 50 100 200 500 1k 2k 5k 10k 20k Hz DA FFT log scale of Dual Freq 19 and 19 5 KHz signal at 0 dBu Output Level ...

Page 9: ...100 200 500 1k 2k 5k 10k 20k Hz DA Frequency Response at 96 KHz sample Rate D_A Jitter Spectrum 0 at27 160 0 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 d B r A 20 20k 50 100 200 500 1k 2k 5k 10k Hz DA Jitter FFT 44 1k Fs with 1 KHz 0 dBFs sine wave signal and 500 Hz sine wave jitter at 1 UI 177 ns amplitude ...

Page 10: ...10 d B u 130 0 120 110 100 90 80 70 60 50 40 30 20 10 dBFS Deviation from Linearity Right scale with 0 dBFs to 130 dBFs Input ADC Measurements A D FFT at2c 160 20 155 150 145 140 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 d B F S 1k 22k 2k 3k 4k 5k 6k 7k 8k 9k 10k 11k 12k 13k 14k 15k 16k 17k 18k 19k 20k 21k Hz AD FFT linear scale with 0 dBu 5 KHz input 18 dBFs dig...

Page 11: ... AD FFT log scale with 0 dBu 5 KHz input 18 dBFs digital output A D FFT Dual Freq at2c 160 20 155 150 145 140 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 d B F S 2 5k 47 5k 5k 7 5k 10k 12 5k 15k 17 5k 20k 22 5k 25k 27 5k 30k 32 5k 35k 37 5k 40k 42 5k 45k Hz AD FFT linear scale with dual frequency 19 and 19 5 KHz 0 dBu signal ...

Page 12: ...k 50 100 200 500 1k 2k 5k 10k 20k Hz AD FFT log scale with dual frequency 19 and 19 5 KHz 0 dBu signal A D FREQ RESP at2c 3 1 2 8 2 6 2 4 2 2 2 1 8 1 6 1 4 1 2 1 0 8 0 6 0 4 0 2 0 0 2 0 4 0 6 0 8 d B r 1 20 40k 50 100 200 500 1k 2k 5k 10k 20k Hz AD High Frequency Response at 44 1k 48k 88 2k and 96k 96k is the limit of the test equipment ...

Page 13: ...uency Freq Resp A D LINEARITY2 at2c 3 3 2 8 2 6 2 4 2 2 2 1 8 1 6 1 4 1 2 1 0 8 0 6 0 4 0 2 0 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 2 2 2 2 4 2 6 2 8 d B F S 130 0 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B F S 110 10 100 90 80 70 60 50 40 30 20 10 0 dBu Deviation from Linearity Right scale from 0 dBFs to 130 dBFs Output ...

Page 14: ...0 200 500 1k 2k 5k 10k 20k 50k Hz T MADA 2 Freq Resp at 44 1k 48k 88 2k 96k 176 2k 196k Sample Rates Mic Pre FFT at2c 140 0 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 2k 32k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k Hz Analog to Analog FFT linear scale 96k Sample Rate 0 dBu Input Output ...

Page 15: ...2k 5k 10k 20k Hz Analog to Analog FFT log scale 96k Sample Rate 0 dBu Input Output 18 dBFs Mic Pre FFT at2c 140 0 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 2k 32k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k Hz Analog to Analog FFT linear scale 96k Sample Rate 18 dBu Input Output 0 dBFs ...

Page 16: ... 24k 26k 28k 30k Hz Analog to Analog FFT linear scale 96k Sample Rate 100 dBu Input Output 118 dBFs A A FFT Dual Tone at2c 140 0 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 2k 32k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k Hz A A FFT linear scale with dual frequency 19 and 19 5 KHz 0 dBu output signal ...

Page 17: ...B u 10 30k 20 50 100 200 500 1k 2k 5k 10k 20k Hz A A FFT linear scale with dual frequency 19 and 19 5 KHz 0 dBu output signal Freq Resp Lo at2c 3 1 2 8 2 6 2 4 2 2 2 1 8 1 6 1 4 1 2 1 0 8 0 6 0 4 0 2 0 0 2 0 4 0 6 0 8 d B u 20 60k 50 100 200 500 1k 2k 5k 10k 20k Hz A A Frequency Response showing 3 dB response at 96k Fs ...

Page 18: ...Freq Resp Lo at2c 90 0 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 d B u 20 60k 50 100 200 500 1k 2k 5k 10k 20k Hz A A Frequency Response showing full response at 96k Fs ...

Page 19: ... 9k 10k Hz Jitter signal extracted from the WC output of MADC 2 measured with swept bandpass filter Blue trace is using internal oscillator Red is synced to WC input Spot Jitter for internal oscillator is 40 ps pk pk 20 ps peak or 14 ps rms maximum Spot Jitter of external WC sync is 130 ps pk pk 65 ps peak or 46 ps rms maximum 50u 1m 100u 150u 200u 250u 300u 350u 400u 450u 500u 550u 600u 650u 700u...

Page 20: ... 1 6m 1 7m 1 8m 1 9m 2m 2 1m 2 2m 2 3m 2 4m 2 5m 2 6m 2 7m 2 8m 2 9m V 20 20k 50 100 200 500 1k 2k 5k 10k Hz FFT log scale of extracted jitter signal Red internal osc Blue external sync Note due to measurement technique jitter figures below 1 KHz may not be entirely accurate ...

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