16
Appendix
AD824—Owner’s Manual
Appendix
Error Messages
The AD824 performs several diagnostic checks when it’s turned on. If a problem is
detected, one of the following error codes appears briefly on the GAIN display.
E1
—Internal backup-battery voltage low.
E2
—Internal memory data corrupt.
E3
—Internal backup-battery voltage low and internal memory data corrupt.
Specifications
Sampling rate
MY8-AE, MY8-TD
39.69–50.88 kHz
MY8-AT
41.013–50.88 kHz
AD conversion resolution
24-bit linear, 128-times oversampling
Frequency response
–1.5, +1 dB, 20 Hz–20 kHz, GAIN +10 dB
–3, +1 dB, 20 Hz–20 kHz, GAIN –62 dB
Dynamic range
1
110 dB (typical), GAIN +10 dB
Gain error
±1 dB @ 1 kHz, GAIN –62 dB to +10 dB
THD
2
0.1%, 4 dB output @ 20 Hz–20 kHz, GAIN –62 dB
0.05%, full scale output @ 1 kHz, GAIN –62 dB
0.05%, 4 dB output @ 20 Hz–20 kHz, GAIN +10 dB
0.01%, full scale output @ 1 kHz, GAIN +10 dB
–92 dB (typical), Rs = 150
Ω
, GAIN +10 dB
–62 dB, Rs = 150
Ω
, GAIN –62 dB
Equivalent input noise
–128 dB, Rs = 150
Ω
, GAIN –62 dB
Crosstalk
–70 dB between adjacent channels @ 1 kHz
Signal delay
0.85 ms (analog input to digital output, fs = 48 kHz)
Phantom power
+48 V
Channel indicators
PEAK
3 dB below full scale
NOMINAL
14 dB below full scale
SIGNAL
34 dB below full scale
+48V
Phantom power on/off
SEL
Channel select
Other indicators
Wordclock
44.1kHz, 48kHz, BNC, SLOT
+48V MASTER
Phantom power master on/off
POWER
Power on/off
Gain display
3-digit, 7-segment LED
