Comtech EF Data MCED-100 - Manual (Page 28)

MCED-100 MetaCarrier Embedding Device Revision 1
Introduction MN-MCED100
1–10
Specification Description
Harmonics and
Spurious
L-Band -60dBc/4 kHz relative to uplink carrier, measured from 250 MHz to 2500 MHz
70/140 MHz -60dBc/4 kHz relative to uplink carrier, measured from 10 MHz to 250 MHz
Output Power
(MetaCarrier / Main carrier)
-22dBc ±2dBc MetaCarrier spectral density relative to main carrier spectral density
Composite Output Carrier
Flatness
<1dB within any 64 MHz band
Integrated Phase Noise 2° rms maximum double sideband, 10 Hz to 1 MHz
Carrier Null 25dB below an unmodulated carrier
Single Sideband Suppression N/A
BUC, 10 MHz and FSK Transparent pass-through, supports up to 4.17 amps 24V DC or 3.125 amps at 48V DC.
FEC (112,70) BCH Code
Input Modulation Types BPSK, QPSK, 8PSK
Input Symbol Rate 128 ksps to 64 Msps
Input Scrambling Types IESS-315 recommended
MetaCarrier Symbol Rate 1/4096 of the Chip Rate
MetaCarrier Spectral Mask 35%
MetaCarrier Mute
Unit mutes MetaCarrier unless CF, Symbol Rate, and Input Carrier Power are successfully
determined.
Chip Rate 112 kcps, 224 kcps
Spreading Ratio 4096
Maximum Packet Size
(including FEC)
122 bits, 32 packets (maximum) per message
Test Modes CW; Alt-1,0; Test IDF; Normal; MetaCarrier frequency offset
Data
Rate
Parameter Chip Rate Spreading Ratio Data Rate (bps)
≥ 128 ksps to <256 ksps 112 kcps 4096 28.00
≥256 ksps 224 kcps 4096 56.00