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ComTech Modem

 

 

 

AvL Technologies

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Proprietary – Content is Subject to Change without Notice              

11

  

5.

 

Issues and Troubleshooting

 

 

Issue 

Description 

Corrective Action 

The ComTech modem is 
not being for the Target 
Acquisition 

Device Window is empty or 
displays data from another 
device

  

Check that the ComTech is configured as 
the Scan, Coarse, and Fine Source for the 
current Target 

Check software Version Info to make sure 
that the correct ComTech Module is 
installed. 

The Modem is not 
communicating with the 
AAQ Controller 

The Device Window is 
empty or displays Not 
Connected 

Check that the antenna controller and 
modem hardware is connected as 
described in section 2.3 

Check that the modem is powered up and 
has finished its boot up sequence. 

Check that the Serial connection is 
configured properly. 

Check the Serial cables and connections. 

All Signal Sources Tried 
With No Valid Signal 
Detected 

The modem does not 
declare a lock when the 
antenna is scanning for the 
Target. 

Check that the ComTech modem is 
communication with the AAQ. 

Check that the frequency configured in the 
modem is the correct frequency for the 
target satellite 

Check all RF cables and connections. 

Check scan speeds in the Signal tab of the 
Configuration Window 

Check that the Compass Heading, GPS 
Location, and World Elevation are correct. 

Invalid Signal for 
Peaking 

The modem does not 
declare a lock at the Fine 
Peaking phase of the 
acquisition. 

 

Check that the frequency configured in the 
modem is the correct frequency for the 
target satellite 

Check all RF cables and connections. 

Check scan speeds and peaking 
parameters in the Signal tab of the 
Configuration Window 

 

Summary of Contents for ComTech

Page 1: ...ide and Reference Revision R11 9 0 Documentation of the interface between the ComTech modem and the AvL Technologies AAQ antenna controller reference information and troubleshooting guide Appendix E AvL Technologies 900 159 005 ...

Page 2: ...sion sequence and updates for 11 6 4 17 17 Rev R11 9 0 WL SW JF Updates for R11 9 0 Contents 1 Introduction 2 2 Setup Guide 3 2 1 Hardware 3 2 2 Software 3 2 3 Hardware Connection 4 2 3 1 Serial Communication Connection 4 2 3 2 Ethernet Communication Connection 4 3 Configuration 5 3 1 Core Configuration 5 3 2 Target Configuration 6 3 3 Signal Configuration 7 3 4 Feed Configuration Items 7 4 Operat...

Page 3: ...indow 10 1 Introduction The ComTech L Band Satellite Modem operates on the AvL Technologies AAQ system with date rates from 2 4 Kbps to 9 98 Mbps This modem supports multiple modulation types such as BPSK and QPSK to name a few The Comtech modem provides support with all externally connected Block Up Converters BUCs and can be configured with and without a BUC power supply it also provides support...

Page 4: ...Notice 3 2 Setup Guide 2 1 Hardware ComTech CDM Series Modem AvL AAQ Antenna System Hub or Switch 2 2 Software Path Main Window Help Version Info Level 0 Be certain that the version of Remote Client ROM device module are at or above the version shown in figure 1 Figure 1 Version info ...

Page 5: ...r and PC or other device running the AAQ Remote GUI Modem to a Network Switch or AvL CIP Rack Mount Interface The serial communication cable from the AAQ antenna modem should be plugged into the Control port on back of the ComTech modem Figure 2 Serial Connection 2 3 2 Ethernet Communication Connection An Ethernet connection is not an option for the hardware associated with this module ...

Page 6: ...egrator or AvL service technician ComTech Modem Connection Settings 4 String The TCP port or Serial settings if serial the format is a b c d where a BaudRate b DataBits c StopBits d Parity This should come configured from the factory and should only be changed by an experienced integrator or AvL service technician ComTech Com Port 4 String Legacy Item DO NOT USE ComTech Com Port Settings 4 String ...

Page 7: ...s are set to ComTech This is done by selecting the drop down list and selecting ComTech Long name Level Type Value Range Description Scan Source 1 Choice The signal source to use when performing a Scan for this Target satellite Coarse Source 1 Choice The signal source to use when performing Coarse Peaking on this Target satellite Fine Source 1 Choice The signal source to use when performing Fine P...

Page 8: ...onfiguration Signal Level 4 Figure 5 Signal Configuration Refer to the user s manual for an explanation of signal configuration items Note When changing Signal parameters be sure the correct signaling device is selected to the left of the window 3 4 Feed Configuration Items There are no feed configuration items associated with this module ...

Page 9: ...quire Command 1 Power up the antenna and modem 2 Command the antenna to acquire 3 The AAQ will read the compass then proceed to the first scan point 4 The antenna detects a lock from the modem and stops The Modem has detected the satellite carrier The AAQ has stopped its scan 5 The AAQ will coarse peak back to the signal This is the initial coarse peak that will move through the entire beam 6 Once...

Page 10: ...Noise reading as reported by the AAQ ComTech Min Lock Signal Signal Level required for the modem to declare lock ComTech Min Valid Signal Signal Level required from modem for AAQ to be able to peak ComTechRx Lock This flag indicating that the modem is locked on carrier ComTech Rx Signal This is the indicator of signal level in SNR from the modem ComTech Signal Average This is the average signal as...

Page 11: ...tatus Indicates whether the ComTech modem is connected or not Signal Level The Rx signal strength that is being reported by the ComTech modem This is the signal that the controller will use to peak on Lock Status The locked status of the ComTech modem of whether it is on the signal or not Transmit Status Indicates whether the ComTech modem transmitter is enable or not 4 3 2 Device Control Window A...

Page 12: ...its boot up sequence Check that the Serial connection is configured properly Check the Serial cables and connections All Signal Sources Tried With No Valid Signal Detected The modem does not declare a lock when the antenna is scanning for the Target Check that the ComTech modem is communication with the AAQ Check that the frequency configured in the modem is the correct frequency for the target sa...

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