Comtech EF Data SDM-300A - Manual (Page 341)

SDM-300A Satellite Modem Revision 6
Troubleshooting MN/SDM300A.IOM
18–5
Figure 18-2. Typical Output Spectrum (with Noise)
ATTEN 10 dB
5.00 dB/DIV
CENTER FREQUENCY
140.000 MHz
RL -20.29 dBm
PASS
CENTER 140.000 MHz
*RB 30.0 kHz *VB 3.00 Hz
SPAN 5.000 MHz
ST 166.7 sec
Figure 18-3. Typical Output Spectrum (without Noise)
ATTEN 10 dB
2.00 dB/DIV
RES BANDWIDTH
10.0 kHz
RL -49.00 dBm
CENTER 70.000 MHz
*RB 10.0 kHz *VB 10.0 Hz
SPAN 1.000 MHz
ST 30.00 sec
Modem Rate = 2144 kbit/s, 3/4 Rate Coding
with 7.8 dB Eb/No (S + N)/N = 10 dB