Quorum GRB-200 - Table 1 - GRB-200 Demodulator Specifications

GRB-200 Demodulator (GOES-R) OI&M
GRB-200 Demodulator (GOES-R) OI&M
© Copyright 2015, Quorum Communications, Inc.
9
Revision A.01
GRB-200 Demodulator Specifications
Radio Frequency
Inputs
2 - Simultaneous LHCP & RHCP
Input Frequency
140 MHz
Input Dynamic Range
-60 to -20 dBm
Image Rejection
> 100 dB
Input Impedance
50 ohms
Input Return Loss
> 15 dB
Input to Input Isolation
> 70 dB
Input Filter(s)
SAW Filter
Input Bandwidth
14 MHz @ 3 dB, 17 MHz @ 40 dB
LO Frequency
140 MHz in quadrature
IF Frequency 0 IF quadrature I and Q, digital demodulation
Demodulator
Basic Demodulator Structure
Advanced ASIC based digital demodulation,
DVB-S2 standard compliant
GRB Modes / Decoding Supported
QPSK 9/10 symbol rate 8.665938 Msps
8PSK 2/3 symbol rate 7.825768 Msps
FEC Supported
LDPC / BCH
GRB Coding and Modulation
CCM (Constant Coding and Modulation)
Implementation Loss
Near Shannon-limit
Typical Eb/No for QEF Performance
(QEF = PER better than 1E-6)
4.1 dB (QPSK 9/10)
3.9 dB (8PSK 2/3)
Transport Stream Support
Generic Transport Stream For Space Data
Packets
Matched Filtering
0.25 roll-off factor
Data / Status Interface
GB Ethernet, CADU packets via UDP
Receive Signal Strength Indicator (RSSI)
DC voltage output for remote antenna
alignment
Electrical / Mechanical
Supply Voltage / Power Universal 100-240 VAC, 47 to 63 Hz, <40W
Quorum GRB Feed Support
+24 VDC @500mA to power feed RS-485 to
monitor feed status
Size 19” rack standard, 1U high, 10” deep
Weight 10 lbs.
Operating Temperature
0 – 50 °C (32 to 122 °F)
Table 1 – GRB-200 Demodulator Specifications