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Specifications
1–14
SPG 422 Service Manual (B034000 and above)
Table 1–8: Signal characteristics for AES/EBU serial digital audio outputs (XLR connectors)
Characteristics
Performance requirements
Supplemental information
Standards Conformance
ANSI S4.40, SMPTE RP 155-1990
Audio Connectors
2
3-pin XLRs, male contacts
Digital Format
Serial, balanced signal pair and a signal
ground
Digital Code
Bi-phase mark
Output Level
2-7 V
p-p
Measured differentially across 110
.
Required Receiver Termination
110
±
10%
Encoding Format
Linear PCM, two’s complement binary
representation.
Audio Sampling Frequency
48.000 kHz, locked to video
Number of Audio Channels
4
2 AES/EBU audio pairs on each audio
connector
Quantized Resolution
20 or 24 bits (user selectable)
Audio Tone Frequency
800 Hz or 1 kHz or Silence (audio black)
User selectable, channel-by-channel
Audio Tone Amplitude
–10 to –20 dB in 2 dB steps plus Silence
(audio black)
User selectable, channel-by-channel
Rise and Fall Times
Between 5 and 30 nsec
Measure from the 10% to 90% points
across 110
.
Pre-emphasis
None
Jitter on Data transitions
Within
±
20 nsec from an ideal clock.
Channel Status Bits
Uses default settings, except explicit data
resolution status. Emphasis bits may be set
to test receivers (but do not enable
emphasis in the data). (See Table 4–15.)
Table 1–9: Signal characteristics for AES/EBU serial digital audio outputs (BNC outputs)
Characteristics
Performance requirements
Supplemental information
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Standards Conformance
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
SMPTE RP 155-1990
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Audio Connectors
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
2
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
BNC connectors
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Audio Timing
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁ
Digital Format
ÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁ
Serial, (unbalanced) signal and a signal
ground
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Digital Code
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
Bi-phase mark
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Output Level
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
1 V
±
0.2 V
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
Measured across 75
.
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
Required Receiver Termination
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
75
±
10%
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
Содержание SPG 422
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