Junger Audio C8840 - Sync interface - Manual (Page 2)

C8000
sync interface
C8840
digital audio
modular
processing system
2/8
technical specifications
Internal sync : 44.1, 48, 88.2, 96kHz
SYNC A IN / SYNC B IN : BNC, 75 Ohm
VIDEO : Black Burst, Composite Sync, Tri Level Sync
level : nominal 1V (0,5 … 2Vpp)
stability : < ±100ppm (typ. ±50ppm lt. AES 11, Grade2)
format : PAL / NTSC / HDTV
rates : 625i50 (PAL)
: 525i60 / 525i59,94 (NTSC)
: 1035i 59,94/60
: 1080i/50/59.94/60
: 720p/50/59.94/60
: 1080p/23.98/24/25/29.97/30/50/59.94/60
frame sync pulse : 25 … 30Hz ±1023 lines - generated from video reference
WCKL :
level : TTL, 1 … 5V
rates : 44,1, 48, 88.2, 96 kHz
stability : < ±120ppm (typ. ±50ppm lt. AES 11, Grade 2)
AES/EBU : AES-3id
level : nom 1V (0,3 ... 1.2Vpp)
rates : 44,1, 48, 88.2, 96 kHz
stability : < ±120ppm (typ. ±50ppm lt. AES 11, Grade 2)
WCLK OUT : BNC, 75 Ohm
level : ≥ 2,4V @ 75 Ohm
rates : 44,1, 48, 88.2, 96 kHz
stability : typ. ±25ppm internal generator
General
Backplane connector
: ref. to DIN41612, 64pin, a+b, male
Power supply
: +5V DC
Consumption
: approx. 300 mA
Dimensions
: 3RU, 4HP, 160mm depth
general remark
For the alignment of the guard band of Dolby E encoded streams, the C8840 provides a frame sync pulse
[see VIDEO-REF at C8611 Dolby E encoder]. It must be derived from a 25 or 30fps (or their fractional
representatives) video reference. If the C8840 is set to internal sync (or falls back to internal sync), the
frame sync pulse will be generated internally. If one provides a frame rate > 30Hz it will automatically
divided by two. This maintains Dolby E encoding but the phase relationship is lost.
Due to the data rates Dolby E data frames will span over two progressive HD video frames.
Dolby recommends to use a HD synchronous black burst derived from the HD master SPG of a facility.
The consequence is that video editing / routing in respect to Dolby E encoded signals can be performed
every second frame only.