1. GOES-R GRB Reception System
Revision B.02

2. Company Profile Founded in 1988
Co-Located with Partner, Orbital Systems, Ltd
19,000 ft2 Engineering & Manufacturing Facility
1 Acre Antenna Systems and Components Test Yard
On Staff RF and Mechanical Engineers
Development Labs for RF, ACUs and FES Products

3. GOES-R GRB Reception System
Designed and Engineered to Provide Reliable and High Performance GRB Reception
Advanced Design Scalar Waveguide Feed
Designed In House Using the Latest CAD Technology
Exceptional G/T Performance
Extensive Filtering for Rejection of Nearby Cell Phone Terrestrial Interference
Custom GOES-R GRB Dual Channel Demodulator Using Latest Commercial DVB-S2 ASICs
Pressurized Feed Electronics for Maximum Reliability

4. Dual Polarity GRB Feed

5. Feed CAD CST Modeling

6. Feed CAD CST Modeling

7. Dual Polarity GRB Feed - Internal
Dual Channel
Downconverter
Air Purge
Valve
Low Loss
Cavity
Filters
Low Noise
Amplifiers
Air Exhaust
Port

8. Dual Polarity GRB Feed Cavity Filter Plate
Field Replaceable Filter / LNA Assembly

9. Feed Controller & Downconverter
Local Oscillator and
Controller PCBs
Top
Front Cover
Dual Channel
Downconverters
Back Cover

10. GOES-R Feed Block Diagram

11. Feed Local Oscillator PC Board

12. Feed Controller Block Diagram

13. Dual Polarity GRB Feed Specifications
Feed Structure
High Efficiency Scalar Waveguide
Center Frequency
MHz
Polarizer
Septum Type, Dual Left Hand and Right Hand
Polarity Isolation
> 27 dB
RF Filtering
Multi-Pole Extremely Hi Q Cavity Filter (Pre LNA)
RF Bandwidth
20 MHz Converted Bandwidth
LNA (s)
25K Noise Temp (0.4 dB Noise Figure)
Downconverter (s) LO Frequency
MHz
Image Rejection
> 100 dB
Output Frequency (Dual Channel)
140 MHz Dual Channel LHC and RHC
Downconverter (s) Performance
Very High TOIP +36 dBm, Low Phase Noise 10 kHz
Feed Power
mA Supplied by Demodulator Through Control Cable
Environmental
-40 to +50 C
Pressurization
Dry Air Pressurization
Status Available (Via RS-485)
LO Lock Status, Temperature, Humidity, Pressure and Voltage
Environmental Control
Automatic Dry Air Purging to Maintain Environment
specifications are subject to change without notice

14. GRB Feed Cavity Filter Response

15. Feed LHCP NF and Gain Test Data

16. Feed RHCP NF and Gain Test Data

17. Feed LHCP Downconverted GRB Test Signal

18. Feed RHCP Downconverted GRB Test Signal

19. 8PSK Test Pattern at L Band Directly from Generator 1686.6 MHz

20. 8PSK Test Pattern Downconverted 1686.6 MHz to 140 MHz LHCP

21. 8PSK Test Pattern Downconverted 1686.6 MHz to 140 MHz RHCP

22. Downconverter LO Phase Noise 100Hz - 1MHz

23. Downconverter LO Phase Noise 100Hz - 10MHz

24. Downconverter Group Delay LHCP

25. Downconverter Group Delay RHCP

26. Feed Cable Loss Budget
System is Designed to Allow for Up to dB IF Cable Loss Between the Feed and the Demodulator
Coaxial Cables Only Carry RF, Feed DC Power and Control is Carried on a 7 Conductor Shielded Cable
Control cable OD = 0.3”, Voltage Drop to the Downconverter with 300’ Cable Length =1.7 VDC (Feed Current 400 mA)

27. GOES-R GRB Demodulator

28. GOES-R GRB Demodulator Rear Panel
AC Power
To Feed
SD Slot
GB Ethernet
LH / RH Inputs

29. Demodulator Internal Photo
IF Amplifiers / SAW
Filters
Freescale iMX6
Module
Feed RS-485
and Power Control
Power Supply
DVB-S2 ASICs

30. GRB-200 Functional Block Diagram

31. Controller Sub-System Block Diagram

32. GOES-R Demodulator RF Section

33. Demodulator Sub System x2 Block Diagram

34. Data Interface Sub System x2 Block Diagram

35. Data Processing Sub System Block Diagram

36. UDP XML Status Message <GRB200> <Serialno val="150101"/>
<Rev val="0.9"/>
<Temp val="32C"/>
<Fan val="OK"/>
<RF>
<AGC val="2.52V"/>
<LOlock val="LK"/>
<LHCP>
<RSSI val="-34.3dB"/>
<Atten val="00dB"/>
</DEMOD>
</LHCP>
<FEED>
<RHCP>
<Power val=" ON"/>
<Current val="52mA"/>
<Overcur val="No"/>
</RHCP>
<Comm val="OK"/>
</RF>
<DEMOD>
<Voltage val="23.4VDC"/>
<PLsync val="ON"/>
<Temp val="38C"/>
<EsNo val="12.4dB"/>
<Hum val="35%"/>
<AGC val="2.45V"/>
<Press val="0.4PSI"/>
<Mode val="8PSK"/>
<Purge val="OPEN"/>
<Spectrum val="NOR"/>
</FEED>
</GRB200>

37. UDP Data Packet Format

38. GRB Demodulator Specifications
Basic Demodulator Structure
Advanced ASIC Based Digital Demodulation, DVB-S2 Standard Compliant
GRB Modes / Decoding Supported
QPSK 9/10 Symbol Rate Msps / 8PSK 2/3 Symbol Rate 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
4.1 dB (QPSK 9/10)
QEF = PER Better than 1E-6
3.9 dB (8PSK 2/3)
Transport Stream Support
Generic Transport Stream for Space Data Packets
Matched Filtering
0.25 Roll-Off Factor
Channels Supported
Simultaneous LHCP and RHCP Reception
Input Frequency (Dual Channel)
140 MHz
Input Filtering
SAW Filter Matched to GRB Signal Bandwidth
Data / Status Interface
GB Ethernet / CADU packets via UDP
Receive Signal Strength Indicator (RSSI)
DC Voltage Output for Remote Antenna Alignment
Size
1U Rack Mount
Power
Universal VAC, 47 to 63 Hz
RF Input Connectors (2)
Type N Female
Feed Support
Provides Power To and Monitors Status of Quorum GRB Dual Polarity Feed
specifications are subject to change without notice

39. GRB Demodulator SAW Filter Response

40. Feed LHCP Downconverted GRB Test Signal Through Demodulator Front End

41. Feed RHCP Downconverted GRB Test Signal Through Demodulator Front End

42. 8PSK Test Pattern Downconverted Through Demodulator 1686
8PSK Test Pattern Downconverted Through Demodulator MHz to 140 MHz LHCP

43. 8PSK Test Pattern Downconverted Through Demodulator 1686
8PSK Test Pattern Downconverted Through Demodulator MHz to 140 MHz RHCP

44. Feed Preliminary Test Data

45. Feed 3.7m G/T Results

46. GVAR GOES West 3.7m Antenna

47. GVAR GOES West 3.7m Antenna GVAR Signal Downlink Off

48. Tracking METOP Satellite L Band Downlink Polarity Test

49. Revision A.01