Red
MAX
™
Subscriber Modem
User Manual
70-00057-01-01-DRAFT
Proprietary Redline Communications © 2006
December
13,
2006
Page 43 of 60
5.3.10 phyConfig - Physical Layer Configuration
The phyConfig mode allows you to view and modify the subscriber physical layer
(PHY) settings. The following table lists all commands available in this mode.
Table 19: CLI - phyConfig - Physical Layer Commands
Command
Description
reset
Set all parameters to factory default values. Requires confirmation.
set
Change physical layer parameter settings.
Bandwidth
: Channel size (KHz).
Selections are: 1750, 3500, or 7000.
FftSize
: OFDM fft size.
Valid settings are: 128, 256, 512, or 1024.
PsDuration
: Physical slot duration.
PsPerOFDMSymbol: Physical slots per OFDM symbol value in PS.
SmplFactorNum
: Above the fraction line in the sampling factor (ns).
Normally set to 8 nsec.
SmplFactorDen
: Under the fraction line in the sampling factor (ns).
Normally set to 7 nsec.
CyclicPrefix
: Cyclic prefix (CP). The guard interval is used to factor
out multipath effect.
Valid settings are: 4, 8, 16, and 32. Default value for subscriber is 16
(1/16).
Example: Enter the following command string to set the channel size to 3500 KHz:
set Bandwidth 3500 [Enter]
show
Display the current setting for all parameters.
For example:
Structure --- <<SS Mmgt PHY Configuration Parameter>>
Bandwidth:..........3500 kHz
FftSize:............256
PsDuration:.........1000
PsPerOFDMSymbol:....68
SmplFactorNum:......8
SmplFactorDen:......7 nsec
CyclicPrefix:.......16 PS
