• Home
  • Comtech EF Data CDM-550 Digital Satellite Modem




Comtech EF Data CDM-550 Digital Satellite Modem

(0) No Reviews yet
  • Data Rates to 2048 kbps
  • Turbo Product Coding (TPC)
  • Universal Data Interface
  • Embedded Distant-end M & C


SKU: SATRES-4575

System Specifications
Frequency Range 52 to 88 MHz

104 to 176 MHz (option)
Input/Output Impedance50 and 75 Ohms (Front panel selectable)
IF ConnectorBNC, female
Digital InterfaceDB25 female, providing:

EIA422/EIA530 DCE

V.35 DCE

X.21 DCE and DTE

Sync / Async EIA232
Data Rate Range

  Rate 1/2 BPSK

  Rate 1/2 QPSK/OQPSK

  Rate 3/4 QPSK/OQPSK

  Rate 7/8 QPSK/OQPSK

  Rate 21/44 BPSK Turbo

  Rate 5/16 BPSK Turbo



2.4 to 1024 kbps

4.8 to 2048 kbps

7.2 to 2048 kbps

8.4 to 2048 kbps

2.4 to 1145 kbps

2.4 to 750 kbps
ScramblerITU V.35 self synchronizing Externally synchronized (synchronous)per IESS-308
FEC:

  Viterbi or Sequential

  Turbo

  Turbo


Rate 1/2, 3/4, or 7/8

Rate 3/4 QPSK

Rate 5/16 or 21/44 BPSK
OVERHEAD:

  Framed EDMAC/AUPC


5% overhead (Except Turbo BPSK modes, which add 1.5%)
AUPC:

  Target Eb/No Range

  Max AUPC Range

  Monitor Functions



0 to 9.9 dB

0 to 9 dB

Distant end Eb/No Tx power level increase
Modulator
Transmit Filtering6th Order Butterworth, per IESS 308
Frequency Stability± 1.5 ppm, 0 to 50° C
Harmonics and Spurious<-55 dBc/4 kHz
Transmit On/Off Ratio 55 dB minimum
Phase Noise< 0.24 ° RMS double-sided,100 Hz to 1 MHz
Output Power0 to -20 dBm, 0.1 dB steps
Accuracy± 0.5 dB over frequency and temperature
Asymmetric Loop TimingMaster / Slave clock relationships

Tx is not equal to Rx data rate

No step size limitation
Clock OptionsInternal (± 1.5 ppm)

External (± 100 ppm tracking range)

Loop timing (Rx sat clock)

Demodulator
Input Power Range-30 to -60 dBm
Max Composite Level+35 dBc, up to -5 dBm
Acquisition Range± 1 to ± 30 kHz (1 kHz steps)
Acquisition TimeDependent on data rate, FEC andacquisition range
Receive Buffer64 to 262144 bits, in 16 bit increments
Receive Clock OptionsRx Satellite, Tx Terrestrial, EXT REF, Insert
Clock Tracking± 100 ppm minimum
External Reference InputBNC connector, 2.4 kHz to 10 MHz
Monitor FunctionsEb/N0, Frequency Offset, BER, Buffer fill status, Rx receive signal level
Example:At 512 kbps, R1/2 QPSK, ± 30 kHz sweep, acquisition time = 0.25 seconds, average
Environmental and Physical
TemperatureOperating: 0 to 50°C (32 to 122°F)

Storage: -25 to 85°C (-13 to 185°F)

Power Supply100 to 240 volts AC, 50/60 Hz
Power Consumption18 W typical, 25 W maximum
Physical Dimensions1U high, 12" (305 mm) deep
Weight7 lbs (3.2 kg)
CE ApprovalsEN55022 Class B (Emissions)

EN50082-1 Part 1 (Immunity)

EN60950 (Safety)
FCC ApprovalFCC Part 15 Class B

Ratings & Reviews

No reviews available

Be the first to Write a Review