A/D Converter

All Products Designed and Manufactured in the USA

Products

By Category

Digital Audio Converters

Analog Audio Converters

Microphone Preamps

Headphone Amplifiers

Distribution & Line Amplifiers

By Series

System 1

System 1000™

MicroFrame™

Legacy Series

Accessories

Rack Mount Coupler
Joins 2 1RU high, 1/2RU wide units such as the DAC1 , ADC1 , & PRE1 $50.00

Blank RM Panel
Rackmount panel for 1RU high, 1/2RU wide space $30.00

RM Kit
RM Coupler & Blank RM Panel for mounting a 1/2RU wide unit in 1RU wide space

BNC-to-RCA Cable, 0.5m
1/2 meter Coaxial male to RCA male digital audio cable $20.00

BNC-to-RCA Cable, 1m
1 meter coaxial BNC male to RCA male digital audio cable $20.00

BNC Female -to- XLR Male Adaptor
Converts coaxial BNC female to XLR male $30.00

BNC Male -to- RCA Female Adapter
Converts a coaxial BNC male to RCA female $5.00

ADC1 USB - Accessories

Analog Audio Inputs

Number of Inputs (balanced)	2
Connector	Gold-Pin Neutrik™ female XLR
Impedance	200 k O
Sensitivity	-14dBu to +29 dBu (at 0 dBFS)

Clock Reference Input

Format	Auto-detect AES/EBU, Word Clock, and Super Clock (256x)
Impedance	75 O
Sensitivity	150 mV AES 200 mV Word Clock 750 mV Super Clock
Transformer Coupled	Yes
DC Blocking Capacitors	Yes
Transient and Over-Voltage Protection	Yes
Jitter Attenuation Method	Benchmark UltraLock

Wordclock Reference Output

Impedance	75 O
Level	5 Vpp 2.5 Vpp into 75 O
Transformer Coupled	No
DC Blocking Capacitors	No
Transient and Over-Voltage Protection	Yes

Digital Audio Outputs

Number of Digital Outputs	1 XLR Main 1 TOSLINK Main 1 BNC Main 1 BNC Aux 1 USB
Connectors	Gold-Pin Neutrik™ male XLR
Number of Audio Channels	2
Main Output Word Length	24 bits
Main Output Sample Frequencies	44.1, 48, 88.2, 176.4, or 192 kHz
Aux Output Word Length	16 or 24 bits
Impedance	110 O XLR 75 O BNC
Level	4 Vpp into 100 O XLR 1 Vpp into 75 O BNC
Transformer Coupled	Yes
DC Blocking Capacitors	Yes
Transient and Over-Voltage Protection	Yes

Audio Performance

Fs = 44.1 to 192 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR - A-Weighted, 0 dBFS = +8 to +29 dBu	121 dB
SNR - Unweighted, 0 dBFS = +8 to +29 dBu	119 dB
SNR - A-Weighted at max gain, 0 dBFS = -14 dBu	108 dB
THD+N, 1 kHz at -1 dBFS	-102 dBFS, -101 dB, 0.00089%
THD+N, 1 kHz at -3 dBFS	-107 dBFS, -104 dB, 0.00063%
THD+N, 20 to 20 kHz test tone at -3 dBFS	-106 dBFS, -103 dB, 0.00071%
Frequency Response at 192 kHz Sample Rate	-3 dB, +0 dB, 2 Hz to 92 kHz +/- 0.01 dB, 20 Hz to 20 kHz -0.06 dB at 10 Hz -0.01 dB at 20 Hz -0.00 dB at 20 kHz -0.18 dB at 88 kHz -3 dB at 92 kHz -100 dB at 108 kHz
Frequency Response at 96 kHz Sample Rate	-3 dB, +0 dB, 1 Hz to 46 kHz +/- 0.01 dB, 20 Hz to 20 kHz -0.06 dB at 10 Hz -0.01 dB at 20 Hz -0.00 dB at 20 kHz -0.10 dB at 44 kHz -3 dB at 46 kHz -108 dB at 54 kHz
Frequency Response at 48 kHz Sample Rate	3 dB, +0 dB, 1 Hz to 23 kHz +/- 0.01 dB, 20 Hz to 20 kHz -0.06 dB at 10 Hz -0.01 dB at 20 Hz -0.00 dB at 20 kHz -0.10 dB at 22 kHz -3 dB at 23 kHz -110 dB at 27 kHz
Passband Ripple	+/- 0.008 dB
Crosstalk	-105 dB at 20 kHz -130 dB at 1 kHz -130 dB at 1 kHz -200 dB at 20 Hz
Jitter Tolerance (With no Measurable Change in Performance)	>12.75 UI sine, 100 Hz to 10 kHz >3.5 UI sine at 20 kHz >1.2 UI sine at 40 kHz >0.4 UI sine at 80 kHz >0.29 UI sine at 90 kHz >0.25 UI sine above 160 kHz
Maximum Amplitude of Jitter Induced Sidebands	< -134 dB with 10 kHz 0 dBFS test tone 12.75 UI sinusoidal jitter at 1 kHz (measurement limit)
Maximum Amplitude of Spurious Tones with 0 dBFS test signal	-130 dBFS
Maximum Amplitude of Idle Tones	-145 dBFS
Maximum Amplitude of AC line related Hum & Noise	-130 dBFS
Interchannel Differential Phase (Stereo Pair)	+/- 0.5 degrees at 20 kHz
Interchannel Differential Phase (Between ADC1 Units)	+/- 0.5 degrees at 20 kHz
Maximum Lock Time after Fs change	< 1 s for frequency lock < 5 s for phase lock
Mute on Sample Rate Change	Yes
Mute on Loss of External Clock	No
Mute on Lock Error	No
Mute on Receive Error	No
Soft Mute Ramp Up/Down Time	10 ms

Group Delay (Latency)

Delay (Analog Input to Digital Output)

1.20 ms at 44.1 kHz
1.09 ms at 48 kHz
0.75 ms at 88.2 kHz
0.67 ms at 96 kHz
0.63 ms at 176.4 kHz
0.59 ms at 192 kHz

LED Status Indicators

LED Location	Front Panel
Mode Indicators	9 green
Meter	14 green, 2 yellow, 2 red

AC Power Requirements

14 green, 2 yellow, 2 red	110 V setting - 95 V min 140 V max 220 V setting - 190 V min, 285 V max
Frequency	50-60 Hz
Power	16 Watts Idle 16 Watts Typical Program 20 Watts Maximum
Fuses	5 x 20 mm (2 required) 110 V setting - 0.5 A 250 V Slo-Blo® Type 220 V setting - 0.5 A 250 V Slo-Blo® Type

Dimentions

Form Factor	1/2 Rack Wide, 1 RU High
Depth behind front panel	8.5" (216 mm)
Overall depth including connectors without power cord or BNC-to-RCA adapter	9.33" (237 mm)
Width	9.5" (249 mm)
Height	1.725" (44.5 mm)

Weight

ADC1 only	3.6 lb.
ADC1 with power cord, 3 BNC-to-RCA adapters, extra fuses, and manual	4.9 lb.
Rack mount kit (blank panel, junction block, and rack-mount screws)	0.32 lb.
Shipping weight	7 lb.

The above graphs show the frequency response of the ADC1 when it is operating at a 192-kHz sample rate. Note that the amplitude response is down by less than 0.05 dB at 10 Hz and 80 kHz. The bass response extends well below the 10-Hz limitation of the measurement equipment, and the high-frequency analog response extends well above the 96 kHz bandwidth of 192 kHz digital audio.

Inter-Channel Phase Response

This graph shows that the differential phase is significantly better than ± 0.25° from 10 Hz to 20 kHz.

THD+N vs. Level 1kHz

This graph shows that, below -4 dBFS, distortion is lower than the noise floor of the converter. Above -3 dBFS, distortion reaches a maximum value of only -107 dBFS.

32K B-H FFT, Idle Channel Noise

This graph demonstrates that the ADC1 is free from idle tones and clock crosstalk. The highest spurious tone measures -128 dBFS and is AC line related hum. The highest non-line related tone measures -135 dBFS.

32K B-H FFT, -3 dBFS, 1 KHz

This FFT plot shows that the ADC1 has very little harmonic distortion. Distortion is exceptionally low and is dominated by 2nd harmonic distortion. Note the near absence of spurious tones.

32K B-H FFT, -3 dBFS, 10 KHz

This FFT plot shows that the ADC1 is free from jitter-induced sidebands. Any jitter present at the conversion sampling circuit would produce sidebands equally spaced above and below the 10 kHz test tone. The tone at 20 kHz is due to second harmonic distortion, and measures almost 120 dB below full scale. Note the near absence of spurious tones.