Comtech EF Data CDM-IP 300L - Manual (Page 55)

CDM-IP 300L IP-Centric Satellite Modem Rev. 1
CD/CDMIP300L.IOM
27
times the acquisition range, whichever is larger.
Each adjacent carrier up to 10 dBc higher in power
than the desired carrier.
A single adjacent carrier spaced 1.4 times the
symbol rate, up to +20 dBc.
LNB 10 MHz Reference On center conductor of L-band input connector,
selectable ON/OFF. Level: -3
± 3 dBm.
Source: 1. Internal High Stability Reference
2. REF EXT Supplied at 10 MHz
Performance: For phase noise, refer to L-Band
Modulator 10 MHz. Frequency stability is the same
as the modulator.
LNB Voltage On center conductor of L-band input connector,
selectable ON/OFF: 13 and 18 volts per DiSEq 4.2
and 24 VDC at 500 mA, maximum
LNB Current Programmable MIN and MAX current alarms
LNB Band Control 22kHz tone outbound from L-band connector per
DiSEq 4.2.
Monitored Signals Receive signal level
Raw BER
Corrected BER range 10-3 to 10-12
Eb/N0, 2.0 to 16.0 dB
Rx frequency offset –500 kHz to +500 kHz
Table 4. Digital Data Rates
The digital data rate is selectable in 1 bit/s steps. The modem automatically calculates
and sets the symbol rate. Data rates entered that exceed the data rate or symbol rate
specification are rejected at entry. The symbol rate range is 4.8 to 2500 kHz.
Modulation Type Encoding Type Data Rate Range
BPSK 1/2
{O}QPSK 1/2
{O}QPSK 3/4
{O}QPSK 7/8
8-PSK 2/3 Viterbi
Viterbi
Viterbi
Viterbi
Viterbi 2.4 kbps
4.8 kbps
7.2 kbps
8.4 kbps
512 kbps 1.25 Mbps
2.5 Mbps
3.75 Mbps
4.375 Mbps
5.0 Mbps
BPSK 1/2
QPSK 1/2
QPSK 3/4
QPSK 7/8 Sequential
Sequential
Sequential
Sequential 2.4 kbps
4.8 kbps
7.2 kbps
8.4 kbps 1.25 Mbps
2.5 Mbps
3.75 Mbps
4.375 Mbps