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DMD15/DMD15L IBS/IDR Satellite Modem Table of Contents
TM051 - Rev. 5.8 ix
3.11.8 SCR: Serial Clock Receive _____________________________________ 3-12
3.11.9 EXT IF REF: External IF Reference_______________________________ 3-12
3.12 Transmit Timing _______________________________________________ 3-12
3.12.1 EXT CLK as TX Clock Source (RS-422 or V.35 Interface) _____________ 3-12
3.12.2 SCT or SCTE ________________________________________________ 3-12
3.12.3 G.703 Interface ______________________________________________ 3-12
3.13 Receive Timing ________________________________________________ 3-12
3.14 Loop Timing __________________________________________________ 3-13
3.14.1 Transmit (RS-422 or V.35 Interface) ______________________________ 3-13
3.14.2 G.703 Interface or Asymmetrical Data Rates _______________________ 3-13
3.14.3 Receive ____________________________________________________ 3-13
3.15 Drop and Insert (D&I) ___________________________________________ 3-13
3.15.1 Drop Only___________________________________________________ 3-15
3.15.2 Insert Only __________________________________________________ 3-15
3.16 Mode Selection ________________________________________________ 3-16
3.16.1 PCM-30 ____________________________________________________ 3-16
3.16.2 PCM-30C ___________________________________________________ 3-16
3.16.3 PCM-31 ____________________________________________________ 3-16
3.16.4 PCM-31C ___________________________________________________ 3-17
3.16.5 T1-D4/T1-D4-S_______________________________________________ 3-17
3.16.6 T1-ESF/ T1-ESF-S____________________________________________ 3-17
3.16.7 SLC-96 _____________________________________________________ 3-17
3.17 Multidestinational Systems _______________________________________ 3-17
3.17 Drop and Insert Mapping_________________________________________ 3-18
3.18 Reed-Solomon Codec (Refer to Figures 3-14, 3-15, and Table 3-1) _______ 3-20
3.18.1 Operation in the DMD15/DMD15L ________________________________ 3-20
3.18.2 Reed-Solomon Code Rate______________________________________ 3-20
3.18.3 Interleaving__________________________________________________ 3-20
3.19 DMD15 Automatic Uplink Power Control (AUPC Operation) _____________ 3-22
3.20 DMD15 Asynchronous Overhead Operation__________________________ 3-24
3.20.1 Asynchronous Framing/Multiplexer Capability _______________________ 3-24
3.21 Standard IBS Mode_____________________________________________ 3-26
3.22 Asynchronous Multiplexer Mode __________________________________ 3-26
3.23 ESC Backward Alarms __________________________________________ 3-26
3.23.1 To Disable the ESC Backward Alarms_____________________________ 3-27