MADA-2 Manual - Forssell Technologies
Contents
1. KO N e 50 100 200 500 1k Hz D A FREQ RESP at2c 10k 20k 40k DA Frequency Response at 96 KHz sample Rate a 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160E 20 WAN 50 100 200 500 Hz D_A Jitter Spectrum 0 at27 2k 5k 10k 20k 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 15 10E 5E a24 0E Esaa 5E E E 11 8 40E E 71 6 15 LAH N 25H 1 afl 0 8 AE 0 6 sok E 0 4 E 02 d d 45E B B E epee EE 0 r u SOE E02 4 55E pa N 70E 75E 80E 85E 90E E2 95E E 2 2 00F E24 E Fa 2 6 105E E E 1 2 8 110F E 130 120 110 100 90 82. i ih aso ELLE LI LHE LUCE EI EL LOVEE NY LEAL 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k 32k Hz Mic Pre FFT at2c Analog to Analog FFT linear scale 96k Sample Rate 0 dBu Input Output MAAALALA wa alas wal al Ah HK Ri IK hy ha eT NINE 2 40 20 50 100 200 500 1k k 5k 10k 20k 30k Mic Pre FFT at2c Analog to Analog FFT log scale 96k Sample Rate 0 dBu Input Output 18 dBFs 79 cma N o j E T o o LU 7 MANO KATI UTT APA JA A L Hut MT A AN TA TARII TAT iui ETT ELE NAMAMANA ill NU ABA LT NAA RT AA AT i i TPP l Hd a oda ao a Aa i tea Lil aso LULL EE ELLE EEL GREE ORE 000000000H000000 00000000000 00000008H000RQ00 Mm LAA NABABINBIN 2k 4k 6k 8l 12k 26k 28k WH 14k 16k 18k 20k 22k 24k 30k 32k Hz Mic Pre FFT at2c Analog to Analog FFT linear scale 96k Sample Rate 18 dBu Input Output
3. NO 3 a o AP wa 4 o N aso LNI 2k 4k 6k 8k 10k 12k 14k 16k 18k Hz D A FFT HiRes Stereo dual freq at2c 20k 22k 24k 26k 28k 30k 32k DA FFT linear scale of Dual Freq 19 and 19 5 KHz signal at 0 dBu Output Level a 20 2 a 30 3 a 40 4 a 50 5 a 60 6 a 70 wa 7 a 80 8 a 90 9 a 100 10 a 110 11 a 120 a _ a a 7 Ea 12 130 135 mmm a F 50 100 500 1k Hz D A FFT HiRes Stereo dual freq at2c 2k 5k 10k 30k DA FFT log scale of Dual Freq 19 and 19 5 KHz signal at 0 dBu Output Level nawa o bo o a o ES o N o N 5 FS D N B D bo Ko A N N pa D D
4. 42 44 1 6 1 8 2 2 2 2 4 2 6 2 8 3 SOP 20 50 100 200 500 1k AD Low Frequency Freq Resp a o Z Onwa onwa 100 105 110 115 120 125 4 a SAN LANG MAA LL MAAN A T mnop AAT 10 100 90 80 70 60 50 40 30 20 10 0 10 dBu A D LINEARITY 2 at2c Deviation from Linearity Right scale from 0 dBFs to 130 dBFs Output 130 Analog In Analog Out Measurements gt va 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k Hz Freq Resp Lo at2c MADA 2 Freq Resp at 44 1k 48k 88 2k 96k 176 2k 196k Sample Rates Ae a o a 2 is 2 a 3 3 a 4i ts 4 a 51 o 5 a 6 S 6 a 7 o wa 7 a 8 is 8 a 9 o 9 a 101 o 10 a 11 o 11 a 120 130 135
5. 0 dBFs Ae a 20 2 a 30 3 a 40 4 a 50 5 a 60 6 a 70 wa 7 a 80 8 a 90 9 a 100 40 a 110 11 a 120 125 Mu Na 1 130 135 140E HEE LELEL HAPN DEAT TEAL PLETE Lh LOUIE LL 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k 32k Hz Mic Pre FFT at2c Analog to Analog FFT linear scale 96k Sample Rate 100 dBu Input Output 118 dBFs 79 2 is 2 a 3 is 3 a 4 o 4 a 5 o 5 a 6 i 6 a wa 7 o 7 a 8 is 8 a 91 is 9 a 101 S 10 a 11 o 11 a 120 125 A A Mm i ra we ni A k 130 135 1 t t LUU LUO A CGR BABAE 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k 32k Hz A A FFT Dual Tone at2c A A FFT linear scale with dual frequency 19 and 19 5 KHz 0 dBu output signal 140 a 2 is 2 a 3 is 3 a 4
6. extracted jitter signal Red internal osc Blue external sync Note due to measurement technique jitter figures below 1 KHz may not be entirely accurate
7. have to install their own connectors and wire them to the MADA board Output Sample Rate selection The output sample rate of the MADA 2 is selected by the single front panel mounted Select switch The LEDs to the right of this switch indicate the output sample rate currently selected The MADA 2 does not remember this setting when power is removed If your sample rate is other than 44 1k then you must reset the output sample rate to the desired sample rate each time the unit is powered up 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 nress The reset switch onlv effects the Over TED and does not reset the converter digital circuitry nor does it change the sample rate back to power up defaults Each time you power up the MADA 2 the Over LED will light up Press the reset switch to turn off the Over LED External Sync Input Your MADA 2 is supplied with an External Word Clock Sync function External Sync is selected by pressing the Select switch until the WC external sync LED is lighted If no valid WC is detected at the WC Input BNC connector then the red SYNC LED will be lighted Once a valid WC is applied to the BNC connector the red LED will turn off indicating that the MADA is locked to the ex
8. 0 70 60 50 40 30 20 10 0 dBFS D A LINEARITY at2c Deviation from Linearity Right scale with 0 dBFs to 130 dBFs Input ADC Measurements onwa o il 4 t t LETTE ELLE LET ETL LL GE LHT iTi l i TLL LI LE PWET MUN I 1k 2k 3k 4k 5k 6k 7k 8k 9k 10k 11k 12k 13k 14k 15k 16k 17k 18k 19k 20k 21k 22k Hz A D FFT at2c a o TT AN DNT t2i maa 7 TY 8 OM AN OF NET Saad AO AWN AS fad Ad An 500 Hz A D FFT at2c AD FFT log scale with 0 dBu 5 KHz input 18 dBFs digital output 20 25 3 is 3 a 4 4 a 5 o 5 a 6 i 6 a 7 o 7 a 8 is 8 a 9 is Onwa 9 a 101 S 10 a 11 o 11 a 121 is 12 a 43 is 13 a 140 145 150 155 t Hi T j E a6oE LUI BBL N W O LG EE I ta La OA BA LTH PI 2 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 47 5k Hz A D FFT Dual Freq at2c AD FFT linear scal
9. 130 135 140 AP 120 H 2k 4k 6k 8k 10k 12k 14k 16k Hz D A FFT HiRes Stereo at2c 18k 20k 22k 24k 26k 28k 30k 32k DA FFT linear scale of 2 KHz signal at 0 dBu output level with a 600 load Red Ch1 Blue Ch2 500 1k Hz D A FFT HiRes Stereo at2c DA FFT log scale 2 KHz signal at 0 dBu output level with a 600 load Red Ch1 Blue Ch2 AP wa 4 o Dm aso LULC A Ja MM LIP PI M LILA HI LI l MN 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k 32k Hz D A FFT HiRes Stereo at2c DA FFT linear scale 2 KHz signal at 100 dBu output level Red Ch1 Blue Ch2 i NAAN il NAYAN IAN ula NANANA MMM Al HUM UL td DA FFT log scale of 2 KHz signal at 100 dBu output level with a 600 load Red Ch1 Blue Ch2 wa 4 o LOLO LAREDO DROS DD KUNAN ILONG LD DD NG Li i 1E F sii fF i
10. F f Forssell Technologies Inc MADA 2 2 Channel Analog to Digital and Digital to Analog Converter o ssal Techndloges 5 Cass A Disaete FET F t For MADA 2 CH 192k AD and DA o User Manual 72311 General Description The Forssell Technologies MADA 2 is an extremely high quality two channel Analog to Digital Converter ADC and two channel Digital to Analog Converter DAC housed in a 1U rack mount enclosure The MADA 2 can be powered from 115 or 230 volt 50 60 Hz line voltages An internally mounted switch selects which line voltage can be used The MADA 2 has AES3 and SPDIF digital inputs and outputs as well as a Word Clock input and output Analog inputs and outputs are balanced and floating so that they can used with either balanced or unbalanced signals Using the MADA 2 with unbalanced analog signal sources will result is slightly worst distortion figures when compared with a balanced analog signal source No such compromise in performance exists for the analog outputs Analog to Digital ADC Section Description The ADC section of MADA 2 is a high quality two channel Analog to Digital Converter The MADA 2 is designed for the most demanding applications where capturing musical performances with accuracy and honesty is required Output sample rates from 44 1k to 192k Fs are selected with a single front panel switch and with LED indicators showing the selected sample rate Digital clipping is ind
11. d floating with an output impedance of less than 5 ohms Either balanced or single ended loads may be connected to the output of the MADA 2 without problem When a single ended load unbalanced is used be sure to take 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 Calibration O dBu Input 18 dBFs Other calibration levels available on request Analog Input Impedance greater than 10k ohm balanced Maximum analog input level is a function level calibration no analog clipping AES3 XLR digital output impedance 110 ohm balanced floating SPDIF RCA digital output impedance 75 ohm balanced floating WC output 5V TTL unterminated Requires 75 ohm load termination at load ADC Latency Input to Output group delay Fs Time 44 1k 1 6 ms 48k 1 48 ms 88 2k 967 us 96k 895 us 176k 660 us 192k 605 us DAC Specifications Noise lt 120 dBFs A weighted Quantization Noise lt 117 dBFs 400 to 22 KHz unweighted Dynamic Range gt 123 dB THD N 0 0009 1Khz 0 dBu output 18 dBFs input 600 ohm load THD N 0 001 1Khz 18 dBu output 0 dBFS inp
12. e with dual frequency 19 and 19 5 KHz 0 dBu signal 20 2 a 3 is 2 a 4 o 4 a 5 o 5 a 6 2 6 a 7 o T a 8 t 8 a 9 is OnwDa 9 a 101 10 a 11 o 11 a a2 is 12 a 131 i 13 a 14 is 14 a 15 o 155 ECE Lj H Hint 160 20 50 100 200 500 1k 2k 5k 10k 20k 40k Hz A D FFT Dual Freq at2c AD FFT log scale with dual frequency 19 and 19 5 KHz 0 dBu signal PIAN NG 50 100 200 500 1k 2k 5k 10k 20k 40k Hz 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 saa Fb 2 6 t24 12 2 2 1 8 1 6 1 4 1 2 1 0 8 0 6 0 4 d 0 2 B r 0 0 2 0 4 0 6 0 8
13. icated with a single front panel LED that latches on until the reset switch is pressed The MADA 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 WC Sync input and Word Clock output BNC are provided An additional Word Clock output is available as an option The MADA 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 ASRC and is performed by a 32 bit sample rate converter The output from the ASRC circuitry is 24 bit at the selected output sample rate Please note that there are no provisions for word length reduction or level metering with this converter Word Clock Output The MADA 2 has a single low jitter word clock output available on a rear panel mounted BNC connector This output is designed to operate into a 75 ohm terminated coaxial cable The output voltage is TTL compatible The WC output follows the output sample rate as selected by the front panel control Additional WC outputs are provided on the MADA board but the user would
14. libration is 1 millivolt 100 picoseconds pk pk jitter 100 microvolt 10 picoseconds pk pk For peak jitter divide by 2 For RMS multiply by 0 3535 7 1 9mE 1 8m E 1 7m 600 700 800 900 1k 2k 3k 4k 5k 6k 7k 8k 9k 10k 20k 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 Ae il 1504H 100u H N N nT oA NAMAMAHALANG A A AAP LALA eee MI SA aly Wis Mibu IWIN ii Wut Mah ll ALA AR INAYA MARALITA INA 1k 2k 3k 5k 7k 8k 9k 10k 11k 12k 13k 14k 15k 16k 17k 18k 19k 20k Hz 76 DH 4 N a 3 100 200 500 1k 2k 5k 10k 20k Hz FFT log scale of
15. nted XLR connector The other is a 75 ohm SPDIF digital output on a rear mounted RCA connector These digital outputs are isolated from each other and they may be used simultaneously Digital to Analog DAC Section Description The DAC section MADA 2 is designed for the most demanding applications where capturing musical performances with accuracy and honesty is required The MADA 2 accepts digital inputs with sample rates from 44 1k to 192k Fs The MADA 2 has AES3 AES EBU 110 ohm on an XLR connector and SPDIF 75 ohm RCA inputs Input selection is via a front panel push button switch with LED indicators showing which input is selected Other front panel LED indicators show input fault condition and SCR lock status Level Calibration Unless otherwise requested when your unit was ordered the MADA 2 is calibrated so that a 18 dBFS digital input level produces a 0 dBu 775 mV analog output level There are two trim pots located on the MDAC board inside the MADA 2 that will allow you to change the level calibration for the DA section Digital inputs There are two digital inputs on the MADA 2 One is configured as an AES 3 or AES EBU input and the other is an SPDIF input The AES 3 input is a 110 ohm transformer isolated and balanced XLR input Pin 1 of this input is connected to chassis ground through a 0 1 mfd capacitor The SPDIF input is a 75 ohm single ended RCA input Analog Outputs The analog output of the MADA 2 are balanced an
16. o 4 a 5 o 5 a 6 i 6 a wa 7 o 7 a 8 is 8 a 9 is 9 a 101 S 10 a 11 o a a a2 is or el a A Parum yr bi HE iat 20 50 100 200 500 1k 2k 5k 10k 20k 30k Hz A A FFT Dual Tone at2c A A FFT linear scale with dual frequency 19 and 19 5 KHz 0 dBu output signal 12 a a43 is 135 o 0 8 0 6 0 4 0 2 0 22 2 4 2 8 wa mopa rnar aaraa a aa a aaa NO is 50 100 200 500 1k 2k 5k 10k 20k Hz Freq Resp Lo at2c A A Frequency Response showing 3 dB response at 96k Fs wa 90 20 50 100 200 500 1k 2k 5k 10k 20k Hz Freq Resp Lo at2c A A Frequency Response showing full response at 96k Fs Word Clock Jitter Measurements Measured at WC output BNC at 96 KHz sample rate Measurement ca
17. ternal WC The MADA 2 should lock within one second of receiving a valid WC sync input signal A wide range of WC input frequencies can be used including vari speed WC signals The WC sync input level should be TTL compatible and needs to be terminated with a 75 ohm resistor The MADA 2 WC input is a high impedance input This allows several units to be feed sync input with from one single WC source To daisy chain several units you will need to use BNC Tee connectors on each unit A 75 ohm terminator should be connected at the Tee connector of the very end of the chain Analog Inputs Analog inputs are provided on rear panel mounted XLR connectors The MADA 2 can accept either balanced or unbalanced input signals Unbalanced signals result in a 6 dB lower headroom The XLR 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 will allow you to change the level calibration for the AD section All four jumpers must be set for the same level calibration Digital Outputs There are two digital outputs available with the MADA 2 One is an AES EBU AES3 110 ohm digital output on a rear mou
18. ut 600 ohm load IMD SMPTE 0 001 0 dBu output 18 dBFs input 600 ohm load IMD SMPTE 0 003 18 dBu output 0 dBFs input 600 ohm load DAC Latency Fs Time 44 1k 1 97 ms 48k 1 8 ms 88 2k 1 13 ms 96k 665 us 176k 712 us 192k 678 us Analog in to Analog Output Specifications Noise Floor 96 dBu unweighted 22 to 22 KHz THD N 0 001 with 1Khz 0 dBu input outout 18 dBFs THD N 0 008 Fs with 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 selected by a line voltage switch mounted inside the MADA chassis 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 115 VAC use 250 milliamp TD fuse 230 VAC use 100 milliamp TD fuse Line voltage changes should only be made by a qualified technician DAC Measurements a 20 2 a 30 3 a 40 4 a 50 5 a 60 6 a 70 wa 7 a 80 8 a 90 9 a 100 10 a 110 115 125
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