GS2961 Datasheet, PDF (44/104 Pages) Gennum Corporation – 3Gb/s, HD, SD SDI Receiver, with Integrated Adaptive Cable Equalizer complete with SMPTE Video Processing

1125-line interlaced video operating at 25 or 30fps. However. PsF video operating at
24fps is detected by the device.
A full list of all major video standards and switching lines is shown in Table 4-7.
4.10.3 Switch Line Lock Handling During Level B to Level A Conversion
When 3G data is detected by the GS2961, and Level B to Level A conversion is enabled,
the device only supports a limited phase offset between two synchronous video sources
if a synchronous switch is implemented.
If the synchronous switch point results in an “extended” active video period, the GS2961
only re-synchronizes to the following TRS ID if the phase difference between the two
sources is less than or equal to 10μs. If the phase difference is greater than 10μs, the
GS2961 takes one additional line to re-synchronize. In this case, the user may observe a
missing H pulse on the line following the switch line, on the H timing output.
Note that this 10μs constraint is only valid when Level B to Level A conversion is
enabled, and only when the synchronous switch point results in an extended active
video area.
Table 4-7: Switch Line Position for Digital Systems
System
1125
750
Frame Rate
& Structure
60/P
50/P
60/I
50/I
30/P
25/P
24/P
30/PsF
25/PsF
24/PsF
60/P
50/P
30/P
25/P
24/P
Pixel Structure
1920x1080
4:2:2
1280x720
4:2:2
Signal
Standard
Parallel
Interface
274M + RP211
274M + RP211
274M + RP211
274M + RP211
274M + RP211
274M + RP211
274M + RP211
274M + RP211
274M + RP211
274M + RP211
296M
296M
296M
296M
296M
Serial
Interface
292
292
Line No.
7
7/569
7
7
GS2961 3Gb/s, HD, SD SDI Receiver, with Integrated
Adaptive Cable Equalizer
Data Sheet
48004 - 2
November 2009
44 of 104