VSTX HD/SD COFDM Transmitter User Manual IMT PUBLICATION: M22-0002-00A, REV 2.
VSTX User Manual Revision History Date Revision Modified By Description October 1, 2009 October 12. 2011 1.0 1.1a JB Mike Hardy Initial release Major Update and cleanup. Removed ASI/SDI. October 27. 2011 November 28. 2011 1.1b 2.0 Updated ribbon table Update December 19. 2011 2.1 January 10. 2012 January 25. 2012 2.2 2.
VSTX User Manual This product has been approved by the following regulatory bodies at 2400 – 2483.5 MHz: FCC (USA) IC (Canada) CAUTION! RISK OF ELECTRICAL SHOCK. DO NOT REMOVE COVERS. Do not remove any covers Refer servicing to qualified technicians only Disconnect all power before servicing Read and perform all instructions carefully Failure to follow suggested instructions and guidelines may void all warranties PRUDENCE! RISQUE DE CHOC ÉLECTRIQUE. NE SUPPRIMEZ PAS LES COUVERTURES.
VSTX User Manual FCC STATEMENT This equipment (FCC ID: I4U-25VST) has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. DÉCLARATION DE FAC Cet équipement (FCC ID: I4U-25VST) a été testé et de respecter les limites pour une classe b dispositif numérique, conformément à la partie 15 des règles de la FCC.
VSTX User Manual IC Notice/:IC Avis 1. Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
VSTX User Manual Afin de maintenir la conformité avec les directives d'exposition RF IC, ce dispositif doit être installé et exploité avec une distance minimale de 20 cm entre le radiateur et le corps de l'opérateur ou à proximité de personnes.
VSTX User Manual Contents 1 Introduction ............................................................................................................................... 14 1.1 2 VSTX Description ...................................................................................................................... 16 2.1 VSTX Features and Benefits....................................................................................................... 16 2.1 VSTX Theory of Operation ......................
VSTX User Manual Power Input cable (w/Control) ..................................................................................................................................... 33 4.4.2 Video Input (Connector Housing) .............................................................................................................. 35 4.4.3 Audio Input (Connector Housing) .............................................................................................................. 35 5 4.
VSTX User Manual 2.1.9 2.1 2.1.1 2.1.2 3 4 Remote Control and Firmware ........................................................................................................ 15 Remote Control via Serial Interface ............................................................................................................... 15 Firmware updates ........................................................................................................................................... 15 Specifications ..
VSTX User Manual 5.4.2 5.4.3 5.4.4 Put the unit in Transmit Mode ........................................................................................................................ 37 Select Power Level ......................................................................................................................................... 37 Verify Operation .............................................................................................................................................
VSTX User Manual Figures Figure 2-1: VSTX Application ______________________________________________________________________ Figure 2-2: Nucomm VSTX Internal Block Diagram ___________________________________________________ Figure 2-3 - Encryption Circuit _____________________________________________________________________ Figure 4-1: VSTX Application With Optional Host Processor ___________________________________________ Figure 4-2: VSTx – Connector Housing (Button & LED version shown) _________________
VSTX User Manual Revision 2.
VSTX User Manual Chapter One 1 Introduction Revision 2.
VSTX User Manual 1 Introduction This document is a user manual for IMT’s VSTX microwave video transmitter. The VSTX is a compact transmitter that digitally encodes video signals and transmits them using COFDM modulation over microwave frequencies using secure methods. The unit accepts Composite video inputs in NTSC or PAL format. It has a built in MPEG4 (H.264) encoder and COFDM modulator. The VSTX is housed in an ultra compact, lightweight enclosure that can be used in harsh environments.
VSTX User Manual Chapter Two 2 Description Revision 2.
VSTX User Manual 2 VSTX Description This chapter describes the VSTX transmitter theory of operation, features, and benefits. It also contains a block diagram of the VSTX transmitter circuitry and a typical application example. The VSTx is available in two basic versions: VSTx with external input connectors VSTx with ribbon cable interface The VSTx with external connectors features direct plug-in compatibility with off the shelf equipment using industry standard interfaces.
VSTX User Manual MPEG4 (H.264) Encoder User Data Channel Remote Control GUI for Programming the VSTx Ultra Compact Housing Optional Ribbon I/O Cable Industry standard video compression. Implements latest algorithms including B frames. Data can be transmitted along with audio and video to the receiver on the ribbon version only. Convenient menu and button based graphical user interface for Windows PC’s. Can be used to program the preset settings on the top panel.
VSTX User Manual Host Processor (For VSTx Configuration) Camera Circuit Antenna VSTx Power Source Figure 2-1: VSTX Application 2.1 VSTX Theory of Operation 2.1.1 VSTX Block Diagram Figure 2-2 is a block diagram of the VSTX internal circuitry.
VSTX User Manual Video Input Circuit Audio Input Circuit MPEG4 Encoder User Data Serial Port UI Buttons and LED’s Programmable Serial Port USB Interface Circuit (Ribbon only) AES Data Encryption COFDM Modulator Microwave Transmitter Microprocessor and Flash Memory Power Figure 2-2: IMTNucomm VSTX Internal Block Diagram Revision 2.
VSTX User Manual 2.1.2 Power and Control Interface Connector The VSTx Power and Control Interface includes power and ground connections plus two RS-232 serial port interfaces. One of the RS-232 interfaces can be connected to a laptop or other PC to program the transmitter configuration. The second RS-232 interface can be used to transmit user data through the transmitter along with the audio and video streams. 2.1.
VSTX User Manual 2.1.8 L, S, and C Band, and X Band Transmitter The VSTX microwave transmitter circuits mix the signal to the desired microwave frequency. The signal is filtered and boosted through a low noise output amplifier. The VSTX has a single SMA (or RP-SMA for 25VST ) style antenna connector. The output impedance of the antenna connector is 50 ohms. Refer to Chapter 3, “Specifications” for frequency band and channel tuning specifications. 2.1.
VSTX User Manual Revision 2.
VSTX User Manual Chapter Three 3 Specifications Revision 2.
VSTX User Manual 3 Specifications 3.1 Frequency Bands Base Part Number Frequency (GHz) RF Power (dBm) DC Power (W) 13VST-13 1.200-1.400 13 4 13VST-20 1.200-1.400 20 6 23VST-13 2.200-2.400 13 64 23VST-20 2.200-2.400 20 6 25VST-13 2.400-2.500 20 4 47VST-13 4.400-5.000 13 65 47VST-20 4.400-5.000 20 6 47VST-23 4.400-5.000 23 8 (Other bands may be available. Contact IMT) Tuning step size: ........................................... 1MHz step size Frequency stability: ......
VSTX User Manual (Other modulations available per user requirements) 3.3 MPEG Encoder Method: ..................................................................... MPEG-4 Part 10/H.264 Video Video Coding: ...................................................... AVC Video Input: ......................................................... Composite NTSC: ......................................... 720 x 480(4:2:0) PAL: ............................................ 720 x 576(4:2:0) Audio Audio Coding: .............
VSTX User Manual 3.6 Environmental Item Specification Temperature Range, Operational, Bottom Surface Temperature Range, Storage Humidity Altitude, Operating Altitude, Storage –10° to +65°C (Base plate temperature. The bottom surface of the VSTX must be maintained within the temperature range listed here.) –40° to +80°C 0% to 95% RH, non-condensing 0 to 20,000ft (6,000 m) Maximum 0 to 50,000ft (15,000 m) Maximum 3.7 Physical Specifications Size (Flex version): ...........................................
VSTX User Manual Chapter Four 4 Installation Revision 2.
VSTX User Manual 4 Installation This chapter contains steps for installing the VSTx transmitter in typical environments where it may be used. ______________________________________________________________ ! WARNING – DO NOT OPEN THE VSTX The VSTX contains no user serviceable parts. Do not open the VSTX housing. Failure to comply will result in voiding of the VSTX warranty. ______________________________________________________________ 4.
VSTX User Manual 4.2 Identifying VSTX Physical Features and Interfaces The VSTx will have either a Connector or Ribbon style housing. The Connector style unit will have either a Button & LED faceplate, or a Rotary/Key, or a Blank faceplate. 4.2.
VSTX User Manual Figure 4-3: VSTX – Button & LED faceplate Figure 4-4: VSTX – Rotary/Key faceplate Revision 2.
VSTX User Manual 4.2.2 Ribbon Housing C D A A B A E A A B Screw Holes for Mounting VSTX Top Surface D E Ribbon Cable Antenna Port C Ribbon Cable Connector; Arrow points to Pin 1. (26 pins total) Figure 4-5: VSTx - Ribbon Housing Revision 2.
VSTX User Manual 4.3 Physical Installation Note: The VSTX is configured via the programmable serial interface. Should you desire to program the unit while in your application, then you r application design must provide a means to connect to the serial interface. If your application cannot support a means to connect to the serial interface, then you must pre-configure the unit prior to installation. Refer to Section 5.
VSTX User Manual 4.4 Connect External Signals (Connector Housing) The VSTX connectors include the following major interfaces: Power and Ground Plus RS-232 programming interface Video Input Connector Accepts Composite Video Analog Audio 1 and 2 Line Inputs 4.4.1 Power and Control (Connector Housing) IMT has pre-made cables available that support Power and/or RS232 Control. The power portion of the IMT cable has two bare tin leads for connection to an appropriate power source.
VSTX User Manual Table 4-2: VSTx (Connector Housing) Power/Control Pinout Pin Function 1 +12VDC 2 RS232 RX 3 USB DM 4 USB DP 5 RS232 TX 6 USB POWER 7 GROUND Notes Not Active Figure 4-7: VSTx (Connector Housing) Power/Control Detail Revision 2.
VSTX User Manual 4.4.2 Video Input (Connector Housing) Connect a Composite video source to the video input. 4.4.3 Audio Input (Connector Housing) Connect audio sources to the two analog audio line inputs. Table 4-3: VSTx (Connector Housing) Audio Pinout Pin Function Notes 1 LINE SELECT Not Active 2 +5V MIC BIAS 3 AUDIO IN Audio line input. 4 GROUND Connected internally to signal & chassis ground Figure 4-8: VSTx (Connector Housing) Audio Detail 4.
VSTX User Manual Table 4-4: Ribbon Cable Connector Cable Pin Assignments Pin on IMT provided Pin # Interface Board (Z036/Z042/etc) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Signal Name Direction GND PA AGC n/aGPI 1 n/aGPI 2 RS232 RX UD RS232 TX UD RS232 RX_RC RS232 TX RC GND n/aUSB_PWR USB_DP USB_DM GND n/aAUDIO1 W/ Bias n/aAUDIO2 W/ Bias AUDIO1 AUDIO2 GND CHROMAn/a COMPOSITE /S-Video GND n/aNC n/aNC GND +12
VSTX User Manual Chapter Five 5 Operation Revision 2.
VSTX User Manual 5 Operation While this chapter contains basic information about the operation of the VSTx transmitter, the programming of the unit (including preset configuration) via the Nano Controller GUI is not covered. Please refer to the “Nano Controller” manual (IMT Publication: M27-0001-00A) for detailed information on how to program and configure the unit. In this section you will find info on how to use the transmitter to transmit video, audio, and user data.
VSTX User Manual 5.3 User Interfaces The VSTx will have either a Connector or Ribbon style housing. The Connector style unit will have either a Button & LED faceplate, or a Rotary/Key, or a Blank faceplate. The user interfaces for the various types are described below. 5.3.1 Button & LED Interface This interface allows the user to select presets and view basic unit status without requiring a remote control. Any changes made remotely will also be reflected on the front panel.
VSTX User Manual 5.3.2 Rotary/Key Interface This interface allows the user to select presets without requiring a remote control. Changes made remotely will NOT be reflected on the front panel. The interface consists of a 16 position rotary switch. The switch is used to advance through the unit presets, from 1-16. The unit will begin to implement the selected preset after the switch has been idle for 5 seconds. The rotary interface unit will always boot up on the physical preset it is set to.
VSTX User Manual 5.3.3 Ribbon Version This interface provides no local control or indications. Changes made remotely will NOT be reflected on the unit. The interface consists of a 26 pin ribbon cable. See Section 4 “Installation” for pin assignments. C D C Ribbon Cable Connector; Arrow points to Pin 1. (26 pins total) D Ribbon Cable Figure 5-3: VSTx - Ribbon Version interface Revision 2.
VSTX User Manual 5.3.3.1 PA AGC Signal Controls the VSTx RF output level when an external PA is used. The input range is 0 to 3.3VDC. 5.3.3.2 RS232 RX UD This is a RS232 input used to transport RS232 data through the RF link. This signal receives data at a user defined baud rate and encapsulates this data into the MPEG Transport stream. RS232 Tx UD 5.3.3.3 RS232 Remote Control RS-232 Tx / Rx This is the RS232 remote control interface. The Tx line is the output from the unit and the Rx is the input.
VSTX User Manual 5.4 Using the VSTX to Transmit Audio and Video Signals The VSTX uses a COFDM modulation scheme. Receiver systems used with the VSTX must be compatible and capable of receiving the type of video transport streams transmitted by the VSTX. Compatible receivers include the IMT VSRx receivers and certain other IMT products. Contact IMT for more information. 5.4.
VSTX User Manual 5.6 Using alternate/custom controllers The implementation of an RS-232 command set, or Remote Protocol, allows the use of customized interfaces to perform virtually all unit operations, including: Configure Settings Query Status The Remote Protocol consists of command and response messages, or packets. The internal CPU handles interpretation of the packets to set unit parameters, and provide responses back through the serial interface.
VSTX User Manual 5.7 Troubleshooting Table 5-1: Table of Troubleshooting Tips Problem Possible Explanations No Power Check power source Camera Malfunction Try a different camera Possible Receiver system issue Verify that all modulation type and encryption/decryption parameters match at transmitter and receiver.
VSTX User Manual Revision 2.
VSTX User Manual Proprietary Information and Disclaimer Notice All information and graphic images contained within this manual are the sole property of IMT, LLC, and are issued in the strictest of confidence. This material may not be reproduced, stored, copied, or converted in any form, nor shall it be disclosed to others or used for manufacturing or any other purpose without the written permission of authorized IMT personnel.
VSTX User Manual Technical Support Information Technical Support personnel are available to extend technical assistance to customers while installing, operating, or troubleshooting IMT equipment. Please have your model number and serial number available. Telephone During IMT business hours, 8:30am - 5:30pm EST (-5 Hours, GMT), call: US ........................................................... 908-852-3700 International ............................................
VSTX User Manual Revision 2.
VSTX User Manual IMT, LLC. 200 International Drive Mt. Olive, NJ, 07828, USA. T +1 908 852 3700 F +1 908 813 0399 www.imt-solutions.com Revision 2.
