Comtec CDM-840 - Block up Converter (BUC) Support; Demodulator; Receive

CDM-840 Remote Router MN-CDM840
Introduction Revision 3
1–12
1.4.3.2 Block Up Converter (BUC) Support
Parameter
Specifications
Reference (10 MHz)
Supplied through Tx IF center conductor, 10.0 MHz ±0.06 ppm, selectable on/off, 0.0
dBm ±3 dB
Power Supply
(HW Option)
Supplied through Tx IF center conductor and selectable on/off via M&C control
• 24V DC, 4.17 Amps max., 90W @ 50° C
•
48V DC, 3.125 Amps max., 150W @ 50° C
1.4.4 Demodulator
Parameter
Specifications
Operating Frequency
950 to 2150 MHz L-Band, 100 Hz frequency resolution
Connector / Impedance
Type ‘N’ female, 50Ω
Input Power Range, Desired
Carrier
-65 dBm + 10
log
(symbol rate in MHz) to -25 dBm
Maximum Composite
Operating Level
-5 dBm total composite power
• 20 dBc within 10 MHz band from the desired carrier for QPSK, 8-PSK, and 16-APSK
• 10 dBc within 10 MHz band from the desired carrier for 32-APSK
• 30 dBc outside of 10 MHz from carrier
Absolute Maximum, No
Damage
-10 dBm
Receive Filter Rolloff (Alpha)
20%, 25%, 35%
Acquisition Range
±100 kHz
Adaptive Equalizer
5-tap, selectable, corrects up to 3 dB tilt
Return Loss
12 dB, minimum (typical 15 dB)
Monitor Functions
Es/No estimate, receive signal level, frequency offset
Monitor
Accuracy
Es/No
±0.3 dB
Rx Signal Level
±6 dB (typical)
1.4.4.1 Receive
Outbound (Hub to Remote)
Parameter
Specifications
Data Rate (Pilots On)
•
QPSK 0.479 – 108.255 Mbps
• 8-PSK 1.740 – 160.0 Mbps
• 16-APSK 2.575 – 160.0 Mbps
•
32-APSK 3.623 – 160.0 Mbps
Symbol Rate
•
QPSK 1 to 62 Msps
• 8-PSK 1 to 62 Msps
• 16-APSK 1 to 47 Msps
• 32-APSK 1 to 37 Msps
FEC
DVB-S2 Decoder (ACM, CCM, and VCM modes), Short Frame, Normal frame