Grass Valley 8920ADT - Manual (Page 28)

22 8920ADT Instruction Manual
8920ADT Analog Audio to AES/EBU Converter with Delay Tracking
Specifications
Table 9. 8920ADT Specifications
Parameter Value
Analog Input
Number of inputs 2
Level for full-scale output +8 dBu to +28 dBu
Connector type Plug-in terminal block on adapter
Input impedance > 22 k Ω
Common mode input voltage ±10 V maximum
Differential DC ±0.25 V maximum
Common mode rejection > 90 dB, 50/60 Hz, > 45 dB to 20 kHz
AES Reference Input
Number of inputs 1 Loop-through
Signal type AES3id – 1992, word clock (48 kHz sample rate), video (PAL/NTSC)
Connector type 75
Ω
BNC
Common mode range ±1 V
Differential voltage range 200 mV to 12 V p-p
Input return loss > 15 dB 100 kHz – 10 MHz @ 75
Ω
Sample rate 48 kHz
Maximum jitter < 6.5 ns RMS
AES/EBU Outputs
Number of outputs 2 unbalanced 75
Ω
or 1 balanced 110
Ω
with terminal adapter
Connector type 75
Ω
BNC or 110
Ω
terminal adapter
Signal type SMPTE 276M (AES3id – 1992) unbalanced or
AES3-1992 balanced transformer output
Output level Unbalanced 1 V ± 0.1 V p-p terminated into 75 Ω or
Balanced 2 V to 7 V p-p terminated into 110
Ω
Rise/fall time 30 ns to 44 ns across 75 Ω load (AES-3id) or
5 ns to 30 ns across 110
Ω
load (AES3)
Sample rate 48 kHz
Output return loss > 15 dB (100 kHz to 6 MHz)
Maximum jitter < 6.5 ns RMS
Channel status bits set 20-bit: Byte 0 = 85 hex, Byte 23 = 71 hex
24-bit: Byte 0 = 85 hex, Byte 2 = 04 hex, Byte 23 = 1E hex
Output bit resolution 20 or 24-bit jumper selectable
Performance (@ +28 dBU input and full scale output)
Module insertion to operation < 1.5 seconds
Signal-to-noise ratio >102 dB, 20 Hz to 20 kHz
>105 dB “A” weighted
THD+Noise, swept 20 Hz to 20 kHz < 0.005%, 20 Hz to 20 kHz, + 24 dBu input
Interchannel crosstalk < -95 dB, 20 Hz - 20 kHz, +28 dBu input
Intermodulation distortion < -100 dB CCIF two-tone test, 19 kHz and 20 kHz tones
Frequency response ± 0.05 relative to 1 kHz, 20 Hz to 20 kHz