Specifications

SDM-650B Satellite Modem Trojan Interface
Rev. 5 G–37
G.6.4.5.6.2 Corrected BER
Command: <add/CBER_”cr”
Response: >add/CBER_nE-m”cr””lf”]
Example:
Request Corrected BER from modem 19.
Command: <19/CBER_”cr”
Response: >19/CBER_2E-5”cr””lf”] CBER = 0.00002 errors/bit
Notes:
1. Corrected BER limits are lower < 1E-8, upper > 01E-3.
2. “No Data” is returned if no carrier is detected (decoder not locked).
G.6.4.5.7 E
b
/N
0
The E
b
/N
0
status command causes the E
b
/N
0
ratio to be returned. E
b
/N
0
is returned in dB.
Command: <add/EBN0_”cr”
Response: >add/EBN0_n.ndB”cr””lf”]
Example:
Request E
b
/N
0
ratio from modem 2.
Command: <2/EBN0_”cr”
Response: >2/EBN0_6.2dB”cr””lf”] Eb/N0 = 6.2 dB
Notes:
1. E
b
/N
0
limits are lower < 3.2 dB, upper > 9.7dB.
2. “No Data” is returned if no carrier is detected (decoder not locked).
G.6.4.5.8 Modulator Rate
Command: <add/MR_”cr”
Response: >add/MR_nnn_mmmm.m”cr””lf”]
Where:
nnn = 1/2, 3/4, 7/8, or BP12 (Coder rate).
mmmm.m = 9.6 to 4080.0 (Data rate).
Note: The parameters “nnn_mmmm.m” may be replaced by “N/A” to indicate “no
assignment.”