Vytek PTX-150 PTX-150 DIRECT DIGITAL PAGING TRANSMITTER Vytek Wireless Products Division User Manual 7M393-1 Rev C2.1 March 2003 Vytek Wireless Products Division 2310 Cousteau Ct Vista, CA 92083 Ph: 760-536-1000 Fax: 760-536-1025 email: sales@sonik.
Vytek PTX-150 CONTENTS 1. INTRODUCTION....................................................................... 1 1.1 1.2 GENERAL ................................................................................................ 1 INDICATORS AND CONNECTORS ........................................................ 2 1.2.1 FRONT PANEL INDICATORS ...................................................................................2 Table1.2.1 LED indication of Transmitter status.................................
Vytek PTX-150 INTRODUCTION 1. INTRODUCTION 1.1 GENERAL The VYTEK PTX-150 Paging transmitter is a state of the art DSP/DDS (Digital Signal Processor/Direct Digital Synthesis) based device capable of generating all paging modulation formats, and is designed as a general purpose transmitter for all speed paging systems. Construction of the transmitter is fully modular. Internally, the case is divided into compartments with PCB’s arranged in modules, all interconnected by plug/sockets.
Vytek PTX-150 1.2 INDICATORS AND CONNECTORS INTRODUCTION 1.2.1 FRONT PANEL INDICATORS Table 1.2.1 illustrates the front panel diagnostic LEDs. Each LED shows the status of selected functions of the transmitter. In the following figure, the ”CONSOLE” connector acts as the standard RS232 interface for local programming. LED POWER TX ON LOW POWER HIGH VSWR FAULT FRONT RS232 ACTIVE FUNCTION Indicates that +24VDC is available from the Power supply. Transmitter is transmitting RF power.
Vytek PTX-150 1.2.2 REAR PANEL CONNECTORS AND SOCKETS CONNECTOR N-TYPE DB9 MAINS INPUT DB37 BNC RJ11 FUNCTION The RF output of the paging transmitter The connection for the external dial modem interface 115/220VAC 50/60Hz input voltage Transmitter Controller unit connection point External reference input (5-15MHz) Internal link MODEM interface Table 1.2.
Vytek PTX-150 1.3 DESCRIPTION OF OPERATION 37 pin DIN Frequency converter and mixer INTRODUCTION RF filter and preamp.Nominal 300 mW/50 ohms 20 Watt Driver Amplifier. DSP/DDS circuits, microprocessor, modulator and TCXO External Freq. standard. (optional) VCO and channel synthesizer Auto Diagnostics Circuits Power Splitter 75 Watt Power Amplifier 75 Watt Power Amplifier Combiner AC Power supply (optional) Filter RF OUT Figure 1.3.
Vytek PTX-150 The final frequency output from the second mixer is filtered, buffered and amplified to 300 mW at 50 ohms, suitable for presentation to the Power amplifier modules. Note that the TCXO of 9.6 MHz supplies the DSP, first LO and second LO to provide the accuracy required for final frequency. The DSP circuitry actually uses 38.4 MHz, which is derived from, a crystal at that frequency phase locked to the 9.6 MHz TCXO. Note also that for high stability options, the 9.
Vytek PTX-150 SPECIFICATIONS 2. SPECIFICATIONS PHYSICAL Dimensions Shipping weight 19” rack mount, 7H x 18.3D in (178mm x 465mm) 40 lbs (18 kg). Table 2.0.1 - Physical Specifications GENERAL Operating voltage Operating temperature Operating humidity Modulation generation Modulation modes 110 / 220VAC±20% -15 to +55°.C 0 to 95% RH @ 50°C Discrete DSP in conjunction with DDS Chip set.
Vytek PTX-150 3. INITIAL INSTALLATION INSTALLATION The following equipment will be required to test the transmitter: 1. A good quality 50Ω dummy load or 30 dB high power attenuator suitable for 150W continuous operation at 174 MHz and with a VSWR of better than 1.15:1. 2. A 486 or better PC with at least 8 Mbyte of RAM and one serial port, installed with RDK software. 3. A suitable cable to connect the serial port of the PC to the dial Modem port of the transmitter.
Vytek • PTX-150 Connect a PC (fitted with RDK software) to either the front panel console or rear panel modem ports of the transmitter, activate the RDK program and verify correct connection by selecting the READ field on the Transmitter Configuration window. The screen then prompts by asking, ”ARE YOU SURE”? If the PC connection and the transmitter system are operational, respond ”YES” and the transmitter parameters are read into the PC screen.
Vytek PTX-150 4. CONNECTION TO NETWORK CONNECTION Once the transmitter has been configured for the network, it is now necessary to install the unit into the station and interface to the LIU (Line Interface Unit). • Verify that the antenna lead is connected to the station antenna. Install a Thruline Wattmeter in series with the transmitter and antenna lead.
Vytek PTX-150 PROBLEM 5. TROUBLE SHOOTING GUIDE The transmitter has a comprehensive test program which initiates on first application of power. It is important to understand the start up sequence to determine a likely fault scenario. Table 5.0.1 lists possible symptoms, and solutions to those symptoms. SYMPTOM Dial Modem connected but the system does not indicate a connection No LEDs light up or no tone heard No RF output power • • • • • • • • • POSSIBLE PROBLEM Power to dial modem is off.
Vytek PTX-150 Transmitter Diagnostic icon on the PC and the program will start to run. From the opening screen, select Tx Diag and the above display will result. Each meter indicates the true state of that transmitter function and will change in real time as adjustments to that transmitter are made. Any of the functions that have a problem (when the needle is not in the GREEN area) will have its label light up RED allowing you to immediately identify the problem area.
Vytek PTX-150 7. WARRANTY Vytek Wireless Products Division Limited Warranty Subject to the Limitations of Warranty and the Warranty Procedures, hereinafter set forth, Vytek Wireless Products Division hereby warrants this product to perform substantially in accordance with its specifications for a period of one year from the date of original purchase from Vytek.
Vytek PTX-150 Warranty Procedure To obtain warranty benefits provided by this warranty, it is the responsibility of the original purchaser to conform to the following procedures: a. Call Vytek Customer Service Department and receive a Return Material Authorization number and form (RMA). b. Without expense to Vytek, return this product to Vytek, attention of the Customer Service Department. Vytek recommends that you insure the shipment for full value, as Vytek is not responsible for lost shipments.
Vytek PTX-150 Appendix A: RDK Software User’s Guide One set of RDK software includes 2 compressed files and one terminal application program. Running Requirements: 1) PC: 486 or above, at least 8M memory, one 1.44M floppy disk drive, one RS-232 serial port, one printer port. 2) Cable: Serial port cable with Pin2, Pin3, Pin5 on the one side connected to Pin3, Pin2, Pin5 on the other side. 3) Operating System: Windows95/98, Windows NT. I.
Vytek PTX-150 so that you can select different protocol (POCSAG or FLEX) just by changing the input level of Pin1 of DB37. IV. Click ”Modem” button to configure dial-out parameters and PMD board. V. Click ”Alarms” button to set alarm limits for RF power, High VSWR, Temperature, Voltage and High Current. VI. Click ”Read” or ” Update” button to Read or Update Transmitter Parameter Settings. VII.
Vytek PTX-150 Appendix B: Basic Connection Between Tx and Controller I.
Vytek PTX-150 ! When the transmitter needs to get external frequency source from External NIU, connect the ”REF IN/OUT” port of External NIU to the ”External Frequency Input” port of SONIK PTX-150 transmitter with a BNC cable. II.
Vytek IV.
Vytek PTX-150 Appendix C: Satellite Link Mode Configuration for External NIU I. Connection between External NIU and SONIK PTX-150 transmitter: ! Connect the DATA, GND and CLK output signal of satellite receiver to TB1-5(Rx Data), TB1-4(GND) and TB1-6(Rx CLK) of External NIU. II. Jumper settings of External NIU: ! S15 Pin 1 is set to be ON. Others remain intact. III. Software configuration for External NIU: ! The serial port settings are: COM1, 19200bps, N, 8, 1.
