Paradise P300 specifications Tx RS outer codec ? =Off 2=INTELSAT n,k,t & depth 3=Other, Intelsat

The Reed-Solomon menu appears as follows:

Tx RS outer codec: [?]

1=Off 2=INTELSAT n,k,t & depth 3=Other

Change, Tx/Rx, Mod/Demod, Reed-Solomon Menu

The Reed-Solomon outer FEC codec may be configured as follows:

OFF	The Reed-Solomon out FEC is disabled. Note that for testing the effectiveness
	of the RS codec, a test mode allows you to disable the RS decoder error
	corrections without removing the RS overhead (which changes the satellite data
	rate and therefore to a small extent the Rx Eb/No).
INTELSAT	This switches the RS codec on using standard INTELSAT values which are as
	follows:

FEC

TCM

Framing

Any

Data Rate

>1544 kbps <= 1544 kbps 2048 kbps

(n,k,t)

(219,201,9)

Depth

8

Non-TCM

eg Turbo, Viterbi, Sequential, or No

FEC

IDR

IBS or

Closed Net

1544 kbps

Other rates

All rates

(225,205,10)

(126,112,7)

4

	Note: When interworking with NEC modems in TCM mode (and IBS framing), NEC have chosen to use
	Interleaving depth 4 for all data rates. For rates >1544kbps then it will be necessary to select `Other`, and
	manually select the interleaving as depth 4.
OTHER	This option is only available if the `Custom Features` feature is available
	(standard on P300-TCM). This feature allows the operator to specify the code rate
	outside of the normal INTELSAT parameters ie a fully variable code rate Reed-
	Solomon codec. The limitations are as follows `n` = [60 - 255], `k` = [n - (2, 4, 6,
	8, 10, 12, 14, 16, 18, or 20)] ie `t`=1 to 10.
	See the applications section, para 8.4 "Choosing Optimum Custom RS N&k
	Values" on page 144

6.6.13 Change, Tx/Rx, Mod/Demod, SCRAMBLER Menu

Scrambler: [?]

1=Off 2=Normal 3:Other

Change, Tx/Rx, Mod/Demod, Scrambler Menu

The Scrambler selection is made from OFF, NORMAL, and CUSTOM.

OFFTurns off all scrambling, and whilst this may be used for testing or carrier line up, it is not normally used over satellite.

P300H P300 Series Modem Installation and Operating Handbook Page 69