GS1560A Gennum Corporation, GS1560A Datasheet - Page 30

• Manufacturer Part Number: GS1560A
• Description: Reclocking Deserializer For HD-SDI, Sd-sdi & Dvb-asi With Loop Thru Cable Driver. 3.3/1.8V Supply.
• Manufacturer: Gennum Corporation

The ability to manually re-synchronize the flywheel is also
important when switching asynchronous sources or to
implement
functions.
The GS1560A also implements automatic switch line lock
handling. By utilizing the synchronous switch points defined
by SMPTE RP168 for all major video standards with the
automatic video standards detect function, the device
automatically re-synchronizes the flywheel at the switch
point.
This function will occur regardless of the setting of the
FW_EN/DIS pin.
The switch line is defined as follows:
•
•
•
GENNUM CORPORATION
Video source 1
Video source 2
Video source 1
Video source 2
Flywheel TRS
Flywheel TRS
FW_EN/DIS
FW_EN/DIS
For 525 line interlaced systems: re-sync takes place at
the end of lines 10 & 273.
For 525 line progressive systems: re-sync takes place at
the end of line 10.
For 625 line interlaced systems: re-sync takes place at
the end of lines 6 & 319.
DATA OUT
DATA OUT
DATA IN
DATA IN
position
position
other
EAV
EAV
EAV
EAV
EAV
EAV
EAV
EAV
ANC
ANC
ANC
ANC
non-standardized
ANC
ANC
ANC
ANC
SAV
SAV
SAV
SAV
SAV
SAV
SAV
SAV
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
Fig. 7a Switch Line Locking - Source 1 leading Source 2
Fig. 7b Switch Line Locking - Source 1 leading Source 2
video
EAV
EAV
EAV
EAV
EAV
EAV
EAV
EAV
switching
ANC
ANC
ANC
ANC
ANC
ANC
ANC
ANC
SAV
SAV
SAV
SAV
30 of 55
SAV
SAV
SAV
SAV
EAV
EAV
EAV
EAV
ACTIVE PICTURE
ACTIVE PICTURE
Switch point
switch video source 2 to 1
ACTIVE PICTURE
ACTIVE PICTURE
Switch point
switch video source 1 to 2
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
•
•
•
•
A full list of all major video standards and switching lines is
shown in Table 4.
NOTE 1 : The flywheel timing will define the line count such
that the line numbers shown in Table 4 may not correspond
directly to the digital line counts.
NOTE 2: Unless indicated by SMPTE 352M payload
identifier packets, the GS1560A will not distinguish between
50/60 frames PsF and 25/30 frames interlaced for the 1125
line video systems; 24 PsF will be identified.
ACTIVE PICTURE
ANC
ANC
For 625 line progressive systems: re-sync takes place at
the end of line 6.
For 750 line progressive systems: re-sync takes place at
the end of line 7.
For 1125 line interlaced systems: re-sync takes place at
the end of lines 7 & 568.
For 1125 line progressive systems: re-sync takes place
at the end of line 7.
ANC
ANC
ANC
ANC
EAV
EAV
EAV
EAV
EAV
Flywheel re-synch
EAV
EAV
EAV
Flywheel re-synch
ANC
ANC
ANC
ANC
ANC
ANC
ANC
ANC
SAV
SAV
SAV
SAV
SAV
SAV
SAV
SAV
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
ACTIVE PICTURE
EAV
EAV
EAV
EAV
EAV
EAV
EAV
EAV
ANC
ANC
ANC
ANC
ANC
ANC
ANC
ANC
SAV
SAV
SAV
SAV
SAV
27360-1
SAV
SAV
SAV