Datum Systems PSM-500L Manual de usuario descargar pdf (Pagina 54)

Datum Systems, Inc. PSM-500 Modem Remote Control Protocol

Rev 0.93 12/12/10

B-54

PSM-500 Series FEC Option Table Rev 1.8 Modem Firmware V 0.77+

FEC

Type

Sel

FEC Type

Option

Sel

Code

Rates

Available

Sel

R-S

Option

Modulation Modes (see notes) & Sel #

BPSK

QPSK

OQPSK

8PSK

8QAM

No Use

16QAM

LDPC

Any

1/2



  

  

Block Size

2/3



  

  

256~16k

3/4



  

  

Option 0~6

14/17



  

  

7/8 4 

  

  

10/11



  

  

16/17



  

  

      

S-Tec

Any

1/2



  

  

Interleaver

3/5



  

  

Block Size

3/4



  

  

Option 0~4

4/5



  

  

5/6 4 

  

  

7/8

Notes:

* TPC4k and TPC16 restrictions apply to that line and Code Rate only.

TPC4k M5 Mode Limits: Rate 1/2 = 2.46 Mbps, Rate 3/4 or 7/8 = 4.92 Mbps.

TPC4k CT Mode Limits: Rate 5/16 = 2.048 Mbps, Rate 21/44 = 3.2 Mbps, Rate 3/4 = 5 Mbps,

Rate 0.95 = 6.6 Mbps.

 Selecting Viterbi, CT option, Rate ¾ or 7/8 automatically sets R-S into 220, 200, depth 4. R-S

can be over-ridden, but is then incompatible.

TPC Advanced modes are Datum Systems proprietary implementations that require the TPC16k

option only for the colored lines. They offer superior performance to CT modes.

LDPC2k Mode Limits: Approximately 3.00 Mbps.

LDPC16k Mode Limits: 29.52 Mbps limited by interface and modulation.

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Datum Systems PSM-500L Manual de usuario Pagina 54

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