Comtech EF Data SDM-650B - Manual (Page 83)

SDM-650B Satellite Modem Configuration
Rev. 5 3–41
Table 3-8. Jumper Selections
Function Install Remove
Clock Source Control By M&C JP8, JP9 JP10, JP11
Clock Source Receive (Bypass) JP11 JP8, JP8, JP10
Clock Source Transmit CLK JP10, JP11 JP8, JP9
Clock Source External JP10 JP8, JP9, JP11
Center Control By M&C JP1
Center Control Local JP1
Clear Flags Control By M&C JP2
Clear Flags Local JP2
Buffer Depth Control By M&C JP3, JP4, JP5, JP14 SW3-1, 2, 3, and 4 — Open
Buffer Depth 512 Bits SW1-Closed
SW2-Closed
SW3-Closed
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 1024 Bits SW1-Open
SW2-Closed
SW3-Closed
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 2048 Bits SW1-Closed
SW2-Open
SW3-Closed
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 4096 Bits SW1-Open
SW2-Open
SW3-Closed
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 8192 Bits SW1-Closed
SW2-Closed
SW3-Open
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 16384 Bits SW1-Open
SW2-Closed
SW3-Open
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 32768 Bits SW1-Closed
SW2-Open
SW3-Open
SW4-Closed JP3, JP4, JP5, JP14
Buffer Depth 65536 Bits SW1-Open
SW2-Open
SW3-Open
SW4-Closed JP3, JP4, JP5, JP14
Table 3-9. INTELSAT Delay Variations
Parameter Inclination (Degrees)
0.5 1.0 1.5 2.0 2.5 3.0 Units
Maximum Variations 1.1 1.8 2.6 3.3 4.1 4.8 ms
Maximum Rate of Variations 40 67 94 121 148 175 ns/sec