Comtech EF Data SDM-9000 - Manual (Page 201)

SDM-9000 Satellite Modem Options
Rev. 4 A–15
A.2.4 Baseband Interface Requirements
A.2.4.1 Timing for Transmit Baseband Interface
A diagram of the timing for the transmit baseband interface is shown in Figure A-10.
Figure A-10. Timing for Transmit Baseband Interface
Parameters for TX baseband interface timing are presented in Table A-2.
Table A-2. TX Baseband Interface Timing
Parameter Description Min
t
su
Setup time, DATA or SYNC to CLOCK 8 ns
t
h
Hold time, CLOCK to DATA or SYNC invalid 2 ns
t
cl
CLOCK low duration 8 ns
t
ch
CLOCK high duration 8 ns
Note: SYNC is only required in DBS mode (204 -byte packets).