CalAmp Wireless Networks 2424046-001 T-96SR UHF Telemetry Transceiver/Modem User Manual 6857
CalAmp Wireless Networks Corporation T-96SR UHF Telemetry Transceiver/Modem 6857
Contents
- 1. Transceiver Manual
- 2. Modem Manual
Modem Manual
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| Document ID | 6857 |
| Application ID | HHbGcaa6jhVVtn/+dwcSYA== |
| Document Description | Modem Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
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| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 24.22kB (302756 bits) |
| Date Submitted | 1998-09-10 00:00:00 |
| Date Available | 1999-07-15 00:00:00 |
| Creation Date | 2001-07-13 16:05:04 |
| Producing Software | Acrobat Distiller 4.0 for Windows |
| Document Lastmod | 2001-07-13 16:05:07 |
| Document Title | Microsoft Word - 6857 |
| Document Creator | ADOBEPS4.DRV Version 4.24 |
| Document Author: | jsoscia |
T-96H Radio Modem Technical Manual version 0.01 PRELIMINARY The entire contents of this manual and the Radio Service Software described in this manual are copyright 1998 by DATARADIO Inc. Copyright DATARADIO Inc. August 1998 part no.: 120 10504-001 Table of Contents 1. PRODUCT OVERVIEW................................................................................................................................... 1 1.1 INTENDED AUDIENCE ....................................................................................................................................... 1 1.2 INTRODUCTION ................................................................................................................................................. 1 1.3 GENERAL DESCRIPTION .................................................................................................................................... 1 1.4 PHYSICAL DESCRIPTION .................................................................................................................................... 1 1.5 CONFIGURATION ............................................................................................................................................... 1 1.6 CATALOG NUMBERS ......................................................................................................................................... 2 1.7 FACTORY TECHNICAL SUPPORT ........................................................................................................................ 2 1.8 PRODUCT WARRANTY ...................................................................................................................................... 2 1.9 REPLACEMENT PARTS....................................................................................................................................... 2 1.9.1 Factory Repair ........................................................................................................................................ 2 1.10 DIAGNOSTICS AND REMOTE COMMANDS ..................................................................................................... 3 1.10.1 Addressing .......................................................................................................................................... 3 1.10.2 Online Diagnostics ............................................................................................................................. 3 1.10.3 Offline Diagnostics ............................................................................................................................. 4 1.10.4 Remote Commands ............................................................................................................................. 4 1.11 NETWORK CONFIGURATION.......................................................................................................................... 4 1.11.1 Basic Network ..................................................................................................................................... 4 1.11.2 Network Using T-Base ........................................................................................................................ 5 1.11.3 Network Using T-Base Repeater......................................................................................................... 5 1.11.4 Network Using T-96H for Online Diagnostics.................................................................................... 6 2. FEATURES AND OPERATION ...................................................................................................................... 7 1.1 OVERVIEW ........................................................................................................................................................ 7 2.1 INTENDED AUDIENCE ....................................................................................................................................... 7 2.2 FRONT PANEL ................................................................................................................................................... 7 2.2.1 LED Indicators........................................................................................................................................ 7 2.3 DTE PORT INTERFACE ..................................................................................................................................... 7 2.3.1 RS-232 Inteface Signal Levels................................................................................................................. 7 2.3.2 Interface Port .......................................................................................................................................... 8 2.3.3 Interface Signal Description ................................................................................................................... 8 2.4 CHANNEL SELECTION ....................................................................................................................................... 9 2.5 OPERATION ....................................................................................................................................................... 9 2.5.1 RTS/CTS Timing.................................................................................................................................... 10 2.5.2 XTAL mode............................................................................................................................................ 10 2.5.3 Extended Turnoff................................................................................................................................... 10 3. ADJUSTMENTS AND MAINTENANCE ..................................................................................................... 11 1.1 OVERVIEW ...................................................................................................................................................... 11 3.1 INTENDED AUDIENCE ..................................................................................................................................... 11 3.2 EQUIPMENT REQUIRED ................................................................................................................................... 11 3.3 MAINTENANCE INTERVALS ............................................................................................................................. 11 3.4 T96H ADJUSTMENTS ...................................................................................................................................... 11 3.4.1 Preliminary Verification ....................................................................................................................... 11 3.4.2 Basic Adjustments ................................................................................................................................. 11 3.4.3 Tests & ajustments................................................................................................................................. 11 3.4.4 Opening the Unit................................................................................................................................... 14 3.4.5 Location of Adjustments and Test Points .............................................................................................. 14 3.4.5.1 4. All Models, Logic PCB .................................................................................................................................14 LOADER/MODEM BOARD CIRCUIT DESCRIPTION............................................................................ 14 4.1 GENERAL..................................................................................................................................................... 14 4.2 4.3 4.4 4.5 4.6 5. TRANSMIT DATA ....................................................................................................................................... 14 RECEIVE DATA........................................................................................................................................... 15 SYNTHESIZER PROGRAMMING.............................................................................................................. 15 POWER SUPPLIES ...................................................................................................................................... 15 MISCELLANEOUS FUNCTIONS ............................................................................................................... 15 SPECIFICATIONS .......................................................................................................................................... 17 INDEX........................................................................................................................................................................ 19 FIGURE 1 - BASIC NETWORK.......................................................................................................................................... 4 FIGURE 2 - NETWORK USING T-BASE ............................................................................................................................ 5 FIGURE 3 - USING A T-BASE REPEATER ......................................................................................................................... 5 FIGURE 4 - NETWORK WITH MONITORING SITE .............................................................................................................. 6 FIGURE 5 - DATA I/O CONNECTOR PINOUT ................................................................................................................... 7 FIGURE 6 - DIP SWITCH LOCATION ................................................................................................................................ 9 FIGURE 7 - LOGIC BOARD ADJUSTMENTS AND TEST POINTS ....................................................................................... 14 TABLE 1 - RS-232 SIGNAL LEVELS .................................................................................................................................. 7 TABLE 2 - CHANNEL SELECTION .................................................................................................................................... 9 TABLE 3 - RTS / CTS DELAYS .................................................................................................................................... 10 TABLE 4 - EXTENDED TURNOFF DELAYS ..................................................................................................................... 10 TABLE 5: TESTS AND ADJUSTMENTS FULL CHANNEL UNITS (25 KHZ & 30 KHZ MODELS)........................................ 12 TABLE 6: TESTS AND ADJUSTMENTS HALF CHANNEL UNITS (12.5 KHZ & 15 KHZ MODELS)..................................... 13 ii What's New in Version 0.01 • First version of the T-96H technical manual based on the latest T96S technical manual ver 2.01. History Version 0.01: • Preliminary version. iii Definitions The following terms are used throughout this document. Item Bit dribble DCE DTE HDX OFLNDIAG ONDMON PLC RS-232 RSS RTS RTU SCADA Simplex Transparent T-96S DL-3276 T-96H Definition Extraneous bits delivered at the end of a data transmission. Equivalent to a “squelch tail” in voice systems. Data Communications Equipment. This designation defines the direction (input or output) of the various RS-232C interface signals. Modems are always wired as DCE. See also DTE. Data Terminal Equipment. This designation defines the direction (input or output) of the various RS-232C interface signals. Most telemetry and SCADA equipment, as well as PCs, are wired as DTE. See also DCE. Half Duplex. A unit which uses separate transmit and receive frequencies, but which may not transmit and receive simultaneously. Offline Diagnostics software. This software allows local (T-96S only) and remote diagnostics (T-96S and RNET 9600S). Online Diagnostics Monitor software. This software allows online diagnostics monitoring of T-96S/DL3276 and RNET 9600S. Programmable Logic Controller. An intelligent device that can make decisions, gather and report information, and control other devices. Industry–standard interface for low speed data transfer (EIA-RS-232E). Radio Service Software. This software allows configuration and testing of the T-96S (T96RSS). Request To Send. An RS-232C signal used by most SCADA equipment to initiate a data transmission. Remote Terminal Unit. A SCADA device used to gather information or control other devices. Supervisory Control And Data Acquisition. A general term referring to systems that gather data and/or perform control operations. A unit which uses the same frequency for transmit and receive. A transparent unit transmits all data without regard to special characters, etc. The DATARADIO T-96S Telemetry Radiomodem. The T-Base is made up of 2 or 3 modified T-96S units. The Johnson Data Telemetry (JDT) version of the T96S. Enhence version of the T-96S capable of 19200 b/s in full channel radio and 9600 b/s in half channel radio models. iv 1. PRODUCT OVERVIEW 1.4 This document provides the information required for the selection, installation, operation and maintenance of the DATARADIO T-96H radiomodem. 1.1 The T-96H consists of a logic PCB (which includes the modem circuitry) and a separate radio module. The two boards plug directly together and slide into the rails of an extruded aluminum case. The front panel includes the DE-15 data connector and a SMA antenna connector, as well as three LED indicators. Power connections are made through the DE-15 data connector. The unit is not hermetically sealed and should be mounted in a suitable enclosure where dust and/or a corrosive atmosphere are anticipated. There are no external switches or adjustments. Operating parameters are set using software. Intended Audience This document is designed for use by engineering design, installation, and maintenance personnel. 1.2 Introduction This chapter provides the information necessary to identify and assess the capabilities of the T-96H. Connection and operation are also described. 1.3 Channel selection may be done using an internal DIP switch, by strapping the appropriate pins on the DE-15 data connector, or by selecting the desired channel using the T96HRSS or the OFLNDIAG. General Description The T-96H is a transparent real-time radiomodem designed primarily for SCADA and telemetry use. The T-96H is available in different versions according to radio frequency. Common features to all versions include: • • • • • • • • • Physical Description 1.5 Configuration Operating characteristics of the T-96H are configured by means of Radio Service Software (T96HRSS - p/n 085 03250-xxx) available from your sales representative. Also available is the Offline Diagnostics software (OFLNDIAG) and the Online Diagnostics Monitor (ONDMON) which give access to offline diagnostics & commands (local and remote) and online diagnostics monitoring with or without a T-Base. Both programs are MSDOS based and will run on any 486 or higher PC (2 Megabytes memory required). Data speeds of 4800 to 19200 b/s (9600 b/s maximum in half channels) using standard RS-232 interface. Built–in 8 channel synthesized radio transceiver for VHF, UHF and 900 MHz. Power output of 1W to 5W (software controlled). Half duplex or simplex operation. Transmit switching via RTS. On-line diagnostics monitoring Offline local and remote diagnostics. Compatible with DATARADIO T-Base for base station or repeater use. Compatible with any The T-96H requires the use of the T96HRSS for both configuration and adjustment. ® NTEROPERABILITY DATARADIO Interoperability Standard (DIOS) equipment for data rate up to 9600 b/s. 120 10503-201 PRELIMINARY T-96S Technical Manual 1.6 Customer Service Department 299 Johnson Avenue, P.O. Box 1733 Waseca, MN 56093-0833 Catalog Numbers A T-96H may be identified from its catalog number. Technical support hours: Monday to Friday 9:00 AM to 5:00 PM, Central Time,. CATALOG NUMBERS Format is TH[radio][band][channel spacing]0 radio 22 phone: 800 992-7774 and +1 507 835-6911 fax: 507 835-6969 Email address: support@johnsondata.com VHF UHF 12 900 92 1.8 band (frequencies in MHz) 380 - 403 403 - 419 Warranty information may be obtained by contacting your sales representative. 419 - 435 132 – 150 435 - 451 150 – 174 450 - 470 464 - 480 480 - 496 496 - 512 1.9 30.0 This product is normally not field serviceable, except by the replacement of complete units. Specialized equipment and training is required to repair logic boards and radio modules. 12.5 Contact Technical Support for service information before returning equipment. A Technical Support representative may suggest a solution eliminating the need to return equipment. 25.0 25.0 For example, a TH12530 is a UHF, 450-470 MHz unit with 25 kHz channel spacing. 1.7 Replacement Parts 928 - 960 channel spacing (frequencies in MHz) 15.0 12.5 Product Warranty Factory Technical Support 1.9.1 Factory Repair The Technical Support departments of DATARADIO and Johnson Data Telemetry (JDT) provide customer assistance on technical problems and serve as an interface with factory repair facilities. They can be reached in the following ways: When returning equipment for repair, you must request an RMA (Returned Material Authorization) number. The Tech Support representative will ask you several questions to clearly identify the problem. Please give the representative the name of a contact person who is familiar with the problem, should questions arise during servicing of the unit. DATARADIO Inc. 5500 Royalmount Ave, suite 200 Town of Mount Royal Quebec, Canada H4P 1H7 Customers are responsible for shipping charges for returned units. Units in warranty will be repaired free of charge unless there is evidence of abuse or damage beyond the terms of the warranty. Units out of warranty will be subject to service charges. Information about these charges is available from Technical Support. Technical support hours: Monday to Friday 9:00 AM to 5:00 PM, Eastern Time,. phone: +1 514 737-0020 fax: +1 514 737-7883 Email address: support@dataradio.com Johnson Data Telemetry Corp. 120 10503-201 PRELIMINARY T-96S Technical Manual Short ID: This value is the low order 10 bits of the ID Number. It is used to identify online diagnostics only. It may not be modified directly using the T96HRSS; it is always derived from the ID Number. All units within a network should have unique Short ID numbers to avoid ambiguity in Online Diagnostics reports. 1.10 Diagnostics and Remote Commands Diagnostics and remote commands are processed using the T96H Offline Diagnostics software (OFLNDIAG). Diagnostics can be monitored using the T96H Online Diagnostics Monitor program (ONDMON). Either the T96HRSS or OFLNDIAG may be used to check the value of the Short ID. When setting up a network, we recommend checking each unit to make sure that there is no duplication of Short ID numbers. Duplications may be resolved by changing the ID Number. The T-96H has the following diagnostic and command features: Online diagnostics. Information is automatically sent by each unit at the beginning of every transmission. May be disabled for back compatibility with DATARADIO T-Modem 96 or Motorola RNET 9600. Offline diagnostics. Information is sent by a specific unit in response to an inquiry by the master or monitoring station. Remote commands. Commands may be sent by the master or monitoring station to any specific remote unit. If ID Numbers are set so that their value is within the range of 1 to 1023, the ID Number and the Short ID will always have the same value. Customers may find this to be a convenience. 1.10.2 Online Diagnostics Online diagnostics (statistics) require the use of a network configuration such as that specified in section 1.11.2. or 1.11.4 Online diagnostics do not interfere with normal network operation. The following information is gathered: 1.10.1 Addressing Each T-96H has addressing capability which is used for diagnostics and remote commands only. Two addresses are used: ID Number: This value (maximum 1023) is assigned at the factory but may be modified using the T96RSS. The ID Number is used to uniquely identify the T-96H for remote commands and offline diagnostics. The ID Number may have values within the range of 1 to 99,999,999 but multiples of 1024 should not be used. 120 10503-201 PRELIMINARY • • • • Supply voltage Internal temperature Forward and reverse power in watts (T96S models only) Received signal strength in dBm Each T-96H can accumulate these statistics for the last 15 stations heard. The accumulated values may be displayed using the OFLNDIAG or dynamically monitored by the Online Diagnostics Monitor program (ONDMON). T-96S Technical Manual 1.10.3 Offline Diagnostics 1.10.4 Remote Commands Offline diagnostics are statistics returned in response to a specific request to a particular station. The use of this feature requires that network operation temporarily be suspended. The following commands may be sent remotely (using the OFLNDIAG). • Begin test transmission (several types available). • Get statistics (diagnostics). • Sample network statistics (monitoring online diagnostics). • Get parameters (configuration) from remote unit. Sending remote commands and receiving responses is done with the host application offline. The following information may be gathered and displayed via the OFLNDIAG: • • • • • Supply voltage Analog supply voltage Internal temperature Received signal strength in dBm Forward and relected power in watts (T96S models only) 1.11 Network Configuration The T-96H is designed to replace wire lines in SCADA, telemetry and control applications. The RS-232 serial port allows direct connection to PLCs (Programmable Logic Controllers) or RTUs (Remote Terminal Units). Several network configurations are described in the sections that follow. 1.11.1 Basic Network This configuration has the following characteristics: T96H PLC Master PLC T96H T96H PLC Figure 1 - Basic Network • Master station may be half duplex or simplex. • Online diagnostics are not available in real time. 120 10503-201 PRELIMINARY • Remote and local diagnostics, accumulated online diagnostics and control are available by disconnecting the master PLC and substituting a PC running the T96H Offline Diagnostics software (OFLNDIAG). T-96S Technical Manual 1.11.2 Network Using T-Base T96H PC for online diagnostics PLC Master PLC T-Base T96H PLC Figure 2 - Network Using T-Base This configuration has the following characteristics: • Master station may be full duplex (duplexer required), half duplex or simplex. • Online diagnostics are available using the Online Diagnostics Monitor program (ONDMON) without disrupting network activity. • Remote and local diagnostics, statistics and control are available using the T96H OFLNDIAG. • The T-Base provides output of online diagnostic information which could be processed by the T-96H ONDMON program or by a user-supplied network management program. Contact your sales representative for further information. 1.11.3 Network Using T-Base Repeater duplexer T96H Master PLC T96H PLC T-Base repeater Figure 3 - Using a T-Base Repeater This configuration has the following characteristics: • Master station and all remotes must be half duplex. • Any of the network types described in sections 1.11.1, 1.11.2 or 1.11.4 may be used with a T-Base repeater. 120 10503-201 PRELIMINARY • The RTS/CTS delays for each T-96H in the system must be extended as shown in section 2.5.1 T-96S Technical Manual 1.11.4 Network Using T-96H for Online Diagnostics T96H PC for online diagnostics PLC T96H T96H Master PLC PLC T96H Figure 4 - Network with Monitoring Site This configuration has the following characteristics: • Master station may be half duplex or simplex. • Accumulated online diagnostics for a maximum of 15 stations are available at a monitoring site (monitoring site must be in range of all remotes). • Online diagnostics are available in real time at the monitoring site. • Remote offline diagnostics, statistics and control are available from the monitoring site by temporarily disabling network activity. 120 10503-201 PRELIMINARY Online diagnostics are accumulated in the monitoring T-96H for the last 15 stations heard. This information may be viewed using the OFLNDIAG. For larger networks, the T-96H can output raw diagnostic data only, which may be interpreted for network management by the Dataradio ONDMON program or by a user-supplied software program. Contact your sales representatives for more information. T-96S Technical Manual 2. Features and Operation 1.1 Overview 2.3 DTE Port Interface This chapter outlines the physical features, connections and theory of operation of the T-96H. 2.3.1 RS-232 Inteface Signal Levels 2.1 In the descriptions of data signals, the following conventions are used: Intended Audience This chapter is intended for use by engineering design, installation, and maintenance personnel. 2.2 Table 1 - RS-232 Signal Levels Front Panel Term Alternates Signal level ON asserted, spacing +3 to +15 V OFF dropped, marking -3 to -15 V The front panel includes: • One SMA type female antenna connector. • Three LED indicators (described below). • One DE-15F interface (includes power connections) ® 10 15 11 T-96H RXTXPWR Pin Name Pin Name Pin Name Ground Ground 11 CS 0 RX Data CTS 12 CS 1 TX Data RTS 13 CS 2 2.2.1 LED Indicators DCD 14 RSSI The T-96H has three LED indicators as shown described: Test Audio B+ Power 10 B+ Power 15 DTR ® INTEROPERABILITY D A TA T ELEM E T R Y LED Indicates Description Green Power DC Power is applied. Flashing green Setup mode Unit is in setup mode. Red Transmit Unit is transmitting a data signal. Yellow Receive Unit is receiving a data signal. 120 10503-201 PRELIMINARY Figure 5 - Data I/O Connector Pinout T-96S Technical Manual 2.3.2 Interface Port 2.3.3 Interface Signal Description The T-96H signals are defined as DCE. Connection to user DTE is made via a DE15 female connector. This connection meets the DATARADIO Interoperability Standard (DIOS). B+ power (input). 10 - 16 VDC (13.3V nominal), maximum 2 A. RX Data. Received data from T-96H to DTE. TX Data. Transmit data from DTE to T-96H. CTS. Clear to Send. Asserted when the T-96H is ready to accept TX Data. RTS. Request to Send. Causes the T-96H to transmit when asserted by the DTE. DCD. Data Carrier Detect. Asserted by the T-96H when a data signal is being received. DTR. Data Terminal Ready. Asserted by the T96HRSS/OFLNDIAG to select setup mode. Do not connect to this pin for user applications. Test Audio. Output signal used during adjustment and testing. RSSI. Output signal used during testing. Users can build a suitable cable by referring to the connector pinout and the Interface Signal Description given in the next section. A cable for connection to a PC AT type DE-9 connector is available from DATARADIO as p/n 730 03267-001. Important Note: The T96H RSS kit, used to configure the T-96H, includes a special setup cable, p/n 730 03266-001. Do not use this cable to connect a user application. Doing so will result in the T-96H switching to “setup mode”, in which case it will not transmit or receive user data. The green LED flashes to indicate that the unit is in this mode. 120 10503-201 PRELIMINARY T-96S Technical Manual 2.4 Channel Selection 1. By setting the channel on the internal DIP switch. CS0 to CS2 on the interface connector must be left disconnected. SW1 2. By strapping connections on the interface connector. There is a 10KΩ pull up resistor on each line (CS0 to CS2). The DIP switch channel settings must be all OFF. Figure 6 - DIP switch location Channel frequencies for 8 channels are selected using the T96HRSS. Once selected, the current operating channel may be selected in one of three ways: 3. By selecting the channel from the T96RSS or the OFLNDIAG programs. The DIP switch channel settings must be all OFF and CS0 to CS2 on the interface connector must be disconnected (open). Table 2 - Channel Selection Channel SW1-3 SW1-2 SW1-1 CS 2 CS 1 CS 0 on on on gnd gnd gnd on on off gnd gnd open on off on gnd open gnd on off off gnd open open off on on open gnd gnd off on off open gnd open off off on open open gnd off off off open open open In the table, “gnd” indicates that the pin should be connected to ground (pin 1 or 6) 2.5 Operation See Table 3 - RTS / CTS Delays for actual value. 2. Data are transmitted as long as RTS is asserted and the PTT timer, if enabled, has not expired. RTS can be dropped after the last stop bit of the last character has been given to the T-96H. CTS will be dropped when the last character has been transmitted on the network. The T-96H operates transparently at the speed set using the Radio Service Software (T96HRSS) and is designed to operate unattended. Basic operation is as follows. 1. The DTE starts a data transfer by asserting RTS. CTS is returned after the transmitter has been keyed and a modem synchronization preamble sent. 120 10503-201 PRELIMINARY T-96S Technical Manual 3. In the idle mode, i.e. no transmission or reception, RX Data will be held in the idle (i.e. “marking”) condition. 4. When a valid radio data signal is received, DCD will be asserted and data will be delivered. 5. When the radio carrier is dropped, the T-96H will clamp RX Data idle (marking) again and drop DCD. At 19200 b/s a few extraneous bits may be delivered after the carrier is dropped (sometimes called “bit dribble”). User software should take this possibility into account. 2.5.1 RTS/CTS Timing The T-96H asserts CTS after RTS has been asserted and a sufficient time has elapsed to allow modem synchronization. The times are fixed at the factory and are not user– adjustable. Repeater mode (Extended time) must be set (via the T96HRSS) if the unit is to communicate through a repeater. Times are increased if online diagnostics are enabled, as shown in the columns diag. on. Table 3 - RTS / CTS Delays RTS/CTS delay (normal) RTS/CTS delay (extended) Speed diag. off diag. on diag. off diag. on 1200 b/s 50 ms 144 ms 80 ms 174 ms 2400 b/s 40 ms 87 ms 70 ms 117 ms 4800 b/s 30 ms 54 ms 60 ms 84 ms 9600 b/s 30 ms 41 ms 60 ms 71 ms 19200 b/s 30 ms 36 ms 60 ms 66 ms 2.5.2 XTAL mode that would otherwise be adversely affected by the extraneous bits. This quiet period is selected via the T96RSS. This mode extends all RTS/CTS delays by 5 ms for compatibility with earlier, crystal controlled products (T-Modem 96, RNet 9600). Select this mode from the T96RSS. Table 4 - Extended Turnoff Delays 2.5.3 Extended Turnoff An end–of–transmission quiet period approximately 8 characters long can be invoked on the T-96H by holding its tranmitter on briefly after RTS is dropped. This quiet period, which occurs between the last valid data character and any possible extraneous “noise” bits, may be of benefit to some DTE 120 10503-201 PRELIMINARY 10 Speed Quiet “turnoff” period 1200 b/s 70 ms 2400 b/s 35 ms 4800 b/s 16 ms 9600 b/s 8 ms 19200 b/s 4 ms T-96S Technical Manual 3.4 3. Adjustments and Maintenance 1.1 3.4.1 Preliminary Verification Before performing any adjustments, verify the performance of the unit as shown in the Table 5 for full channel units in the Table 6 for half channel units. Overview This chapter outlines the basic adjustment procedures required upon initial installation and thereafter at prescribed maintenance intervals. Units are delivered from the factory properly aligned and tested on the frequencies specified at time of order. Adjustment beyond that described in this chapter is not required unless radio modules have been tampered with or repaired. In such cases we recommend complete factory re-alignment as special test jigs are required. 3.1 Important Note: Before proceeding make sure that the service monitor has been calibrated recently and has warmed up for at least the time specified by its manufacturer. Some reported frequency and deviation problems have actually been erroneous indications from service monitors that have not adequately warmed up. This is particularly likely when field service is done during winter months. Intended Audience 3.4.2 Basic Adjustments This chapter is intended for use by installation and maintenance personnel. 3.2 Basic adjustments to be performed are: 1. 2. 3. 4. Equipment Required The adjustments described below require the following equipment: • • • • • • 3.4.3 Tests & ajustments Refer to the T96HRSS help file for parameter information. 1. Connect the T-96H antenna connector to the TX/RX input of the service monitor using a suitable length of 50 ohm cable. 2. Connect the T-96H to a suitable power supply and adjust the supply voltage to 13.3 volts. 3. Using the setup cable (p/n 730 03266-001; part of kit 085 03250-xxx) connect the T-96H Data connector to the serial port of a PC and run the T96HRSS program. This cable is required to put the T-96H into setup mode. 4. Press GET to get the configuration of the unit. 5. Refer to “Tests and Adjustments” tables related to the radio type (half or full channel). Maintenance Intervals The adjustments described below should be done once upon initial installation of the unit, and thereafter at annual intervals or whenever a deterioration in performance indicates that adjustment may be required. 120 10503-201 PRELIMINARY Transmitter power output TX/RX frequency Transmitter deviation Demodulated audio level These adjustments should be performed in the sequence shown above. 13.3 VDC (nominal), 3A regulated power supply. Radio service monitor (IFR or equivalent). Cable with SMA-male connector to connect T-96H to the service monitor. T96H Radio Service Software (T96HRSS) kit, including setup cable (p/n 085 03250xxx) A 486 PC (or better) to run the T96HRSS. Normal radio shop tools. 3.3 T96H Adjustments 11 T-96S Technical Manual Table 5: Tests and Adjustments full channel units (25 KHz & 30 Khz models) STEP ACTION EXPECTED RESULTS at 25°°C Output Power 5 watts 1 Press PTT Channel x +10%, -20% MEASURE WITH IF NOT? Service monitor set to read power Check T96HRSS maximum power output setting: must be set to 255 (means 5W) Refer to factory tech support. Frequency Error ±300 Hz Press PTT Channel x Deviation ±4.0 kHz 3 Press PTT Channel x +5%, -10% Service monitor set to read frequency error Open the unit (see 3.4.4) Service monitor set to read deviation with mid (15 - 30 kHz) IF filter. Using T96HRSS, adjust TX deviation with the up/down arrows. Adjust the Frequency Adjust control on the TCXO 2 Set the service monitor to generate a -80 dBm signal on the selected receive frequency. The signal should be modulated with a 1.0 kHz tone. Demodulated Audio 2.0 ±0.2 Vpp Oscilloscope connected to pin 4 of the data I/O connector. 4 Using T96HRSS, adjust receive audio level with the up/down arrows. ≤ 0.5 µV 5 Service monitor set for SINAD. Connect to pin 4 of the data I/O connector 4. Refer to factory technical support. < 3% Service monitor set for Distortion. Connect to pin 4 of the data I/O connector 4. Refer to factory technical support. • For 9600 b/s set generator deviation to ±2.5 kHz. • For 1200 - 4800 b/s set generator deviation to ±4.0 kHz. 12 dB SINAD Set deviation to ±3 kHz. Set IF filter to mid (1530 kHz), no audio filter. Distortion Set deviation to ±3 kHz. Set IF filter to mid (1530 kHz), no audio filter. 1 (unless you have set a lower value). Note that readings less than 5 watts may be due to losses in the cables used for testing. Check also your wattmeter frequency calibration curve. Do not be too ready to condemn the transmitter. The TCXO adjustment is accessible through the hole next to the DIP switch on the logic board. The unit is automatically set to 19200 b/s (Bt.3) for this procedure. If the unit is later used at 9600 b/s (Bt.5) or 4800 b/s, the deviation be will automatically set to ±3.0 kHz and ±4.0kHz respectively. Pin 4 is accessible by removing the cable connector hood. If you anticipate frequent need for access to this pin, solder a short insulated lead to that pin on the cable connector and replace the hood. (The same signal is available at TP1 on the logic board if the unit is open). If a psophometrically weighted filter is available on the service monitor, use 0.35 µV. 120 10503-201 PRELIMINARY 12 T-96S Technical Manual Table 6: Tests and Adjustments half channel units (12.5 kHz & 15 Khz models) STEP ACTION EXPECTED RESULTS at 25°°C Output Power 5 watts 1 Press PTT Channel x +10%, -20% MEASURE WITH IF NOT? Service monitor set to read power Check T96RSS maximum power output setting: must be set to 255 (means 5W) Refer to factory tech support. Frequency Error ±300 Hz Press PTT Channel x Deviation ±3.0 kHz 3 Press PTT Channel x +5%, -10% Service monitor set to read frequency error Open the uniit (see 3.4.4) Service monitor set to read deviation with mid (15 - 30 kHz) IF filter. Using T96HRSS, adjust TX deviation with the up/down arrows. Adjust the Frequency Adjust control on the TCXO 2 Set the service monitor to generate a -80 dBm signal on the selected receive frequency. The signal should be modulated with a 1.0 kHz tone. Demodulated Audio 2.0 ±0.2 Vpp Oscilloscope connected to pin 4 of the data I/O connector. 4 Using T96HRSS, adjust receive audio level with the up/down arrows. ≤ 0.5 µV 5 Service monitor set for SINAD. Connect to pin 4 of the data I/O connector 4. Refer to factory technical support. < 3% Service monitor set for Distortion. Connect to pin 4 of the data I/O connector 4. Refer to factory technical support. For 1200 - 4800 b/s set generator deviation to ±2.0 kHz. 12 dB SINAD Set deviation to 1.5kHz. Set IF filter to mid (1530 kHz), no audio filter. Distortion Set deviation to 1.5kHz. Set IF filter to mid (1530 kHz), no audio filter. 1 (unless you have set a lower value). Note that readings less than 5 watts may be due to losses in the cables used for testing. Check also your wattmeter frequency calibration curve. Do not be too ready to condemn the transmitter. The TCXO adjustment is accessible through the hole next to the DIP switch on the logic board. The unit is automatically set to 9600 b/s (Bt.3) for this procedure. This T96H model has not been designed to operate at 19200 b/s using half channel radios. If the unit is later used at 4800 b/s (Bt.5), the deviation will be automatically set to ±2.0 kHz. Pin 4 is accessible by removing the cable connector hood. If you anticipate frequent need for access to this pin, solder a short insulated lead to that pin on the cable connector and replace the hood. (The same signal is available at TP1 on the logic board if the unit is open). If a psophometrically weighted filter is available on the service monitor, use 0.35 µV. 120 10503-201 PRELIMINARY 13 T-96S Technical Manual 3.4.4 Opening the Unit 4. Loader/Modem Board Circuit Description 1. Remove the two retaining nuts from the data I/O connector, and the nut and washer from the antenna connector. 4.1 The Loader/Modem board, Part No. 03280-xxx, is a plug-in circuit board. The four main functions of the Loader/Modem board include, loading the radio synthesizer, providing the baseband modulating signal for the transmitter and demodulating receive audio signals. The Loader/Modem board is programmed by a personal computer and software. The Loader/Modem board connects to the radio through 14-pin connector P1/J201. User data, programming channels and other operating parameters are provided through a DE15 connector. A block diagram of the 2. Remove the four screws holding the rear panel heat sink. 3. Slide the unit out of the case from the rear. 3.4.5 Location of Adjustments and Test Points 3.4.5.1 All Models, Logic PCB Adjustments and test points are shown below. Access Hole for TCXO U4 J1 modem is shown at the end of this section. Y1 SW1 GENERAL 4.2 U5 TRANSMIT DATA TP4 L1 U1 Transmit Data from the RS-232 port is level-shifted to TTL by U1, then gated through U6 and converted from asynchronous to synchronous format by U2. The CPLD modem, U6 takes the digital data stream and synthesizes to the constant-amplitude analog baseband signal, which is filtered by U12, buffered by U10B then applied to radio module TXA at P1-6. U3 U2 U6 TP1 TP2 TP3 Figure 7 - Logic Board Adjustments and Test Points The modem IC is a CPLD based on a Philips eXtended Programmable Logic Array (XPLA, PZ5128) which, with a programmable Raise–Cosine filter 120 10503-201 PRELIMINARY 14 T-96S Technical Manual (U12), operates in DRCMSK1 mode at 4800, 9600 and 19200 bits/sec. It incorporates a 7-bit hardware scrambler and uses Differential (NRZI) encoding in DRCMSK mode to minimize data pattern-sensitivity. Electronic potentiometer U9B (E-Pot), controlled by CPU U5, is used to set the transmitter deviation by amplitude adjustment of the baseband signal. verter U2, the filter cut-off frequency, the serial port handshake lines, and the LED indicators via Q1-3. 4.3 4.5 Three channel select inputs, ESD protected by D1,2,3, in parallel with the onboard DIP switches, are read by the CPU to select the active channel. The fourth DIP switch puts the unit in TEST mode, which sends a test, tone (data rate/4). RECEIVE DATA Received signals are applied to the RXA pin on P1-13 and amplified by U7A, whose gain is set by the electronic potentiometer U9A, then filtered by U12. The same filter circuit is used for transmission and reception: two analog multiplexer/demultiplexer gates (U11 A and B) controlled by TX_EN line are used for sharing. The filter U12 cut-off frequency is programmable by the CPU, based on the data rate. The analog signal is then fed to Peak Detectors U7C and U7D, to the slicer circuit U8C via U7B and U8B. The resulting synchronous bit stream is converted to asynchronous at U2 and shifted to RS-232 levels by U1. The main DC power (13.3V nom.) coming from J1.5,10 is filtered out for tranzient and then sent directly to powerup the radio module at P1.2. Voltage Regulator U14 (AVCC) provides 5 V for the receiver RX_5V and analog modem circuitry, while U13 (DVCC) provides 5V for the CPU and other digital logic. 4.6 MISCELLANEOUS FUNCTIONS U4 generates a power-on reset for the CPU and U3 is a temperature sensor used by the firmware to compensate for variations in RSSI. 4.4 SYNTHESIZER PROGRAMMING The RF module’s RSSI output, P1-12, is read by an analog input on the CPU, which implements a squelch threshold in software. Other analog inputs are used to read ambient temperature (used to correct RSSI variations) and various internal voltages (B+_LVL, AVCC, etc.). The CPU programs the RF module synthesizer serially on each Tx/Rx transition. Logic of U1 and U11A/B switch the receive and transmit data path from the modem to the radio and/or the external serial port, under CPU control. The CPU also controls the sync/async con1 The DTR_PGM input, J2-10, puts the CPU in programming mode in which the CPU accepts commands and setup data from the Radio Service Software. DRCMSK = Differential Raise Cosine Minimum Shift Keying 120 10503-201 PRELIMINARY POWER SUPPLIES 15 T-96S Technical Manual Y1 RESET RAM ROM E-Pot U9A U8A U6 U2 TXA Slicer Level CPLD Modem SYNC-ASYNC CONVERTER U5 RADIO MODULE RXA U8C Controlled by CPU' TX_EN Line U8B RXS Logic Gates U12 E-Pot U9B U7C,D,B PEAK DETECT W.DOG U7A I/O DIGITAL U8D U10B TXA MODEM SIO 2 U1 DE15 DRIVER RXD CTS DCD DTR TXD RTS SIO 1 RCVR U10C U10D RSSI RS232 CTC CONTROL BUS SYNTHESIZER DIAGNOSTICS A/D CPU U3 TEMPERATURE VOLTAGES LEDS DIP SWITCHES U13, U14,F1 5.0V 13.3V TX SUPPLY MONITORING U4 RX SUPPLY RESET POWER SUPPLY Figure 8 – Logic / Modem board Block Diagram 120 10503-201 PRELIMINARY 16 T-96S Technical Manual 5. Specifications GENERAL Frequency Channel spacing Operating temperature Supply voltage RX Current at 13.3 VDC TX Current at 13.3 VDC RX/TX bandwidth VHF 132 - 174 MHz 15 or 30 kHz 120 mA 1.6 A UHF 900 MHz 403 - 512 MHz 928 - 960 MHz 12.5 or 25 kHz 12.5 or 25 kHz -30°C to +60°C 10 - 16 VDC (applied through the interface connector) 125 mA 135 mA 1.8 A 2.3 A 18 MHz (132 - 150) 24 MHz (150 - 174) 16 MHz except 20 MHz (450 - 470) 2.25” (H) x 3.25” (W) x 4.75” (L) SMA-F DE-15F high density D-subminiature Nominal Dimensions RF connector Interface connector 32 MHz RECEIVER VHF UHF Sensitivity (12 dB SINAD) 900 MHz < 0.35 µV * Selectivity (25 or 30 kHz) 75 dB typical 70 dB minimum 72 dB typical 65 dB minimum Selectivity (12.5 or 15 kHz) 65 dB typical 60 dB minimum 63 dB typical 60 dB minimum Intermodulation 75 dB typical 70 dB minimum 72 dB typical 70 dB minimum Spurious rejection 75 dB typical 70 dB minimum 75 dB typical 70 dB minimum FM hum & noise -48 dB typical * -45 dB max (30 kHz) * -40 dB max (15 kHz) * < -57 dBm maximum Conducted spurious * psophometrically weighted filter -40 dB max (25 kHz)* -35 dB max (12.5 kHz)* TRANSMITTER VHF UHF 900 MHz 1 - 5 watts 1 - 5 watts 1 - 5 watts -63 dBc (-26 dBm) typ -57dBc (-20 dBm) max 2.5 ppm -75 dBc (-38 dBm) typ -63dBc (-26 dBm) max -75 dBc (-38 dBm) typ -57 dBc (-20 dBm) max Power output Spurious and harmonics Frequency stability FM hum and noise 1.5 ppm -50 dB typ (30 kHz) -45 dB max (30 kHz) -40 dB max (15 kHz) Attack time Duty cycle 120 10503-201 PRELIMINARY -50 dB typical (25 kHz) -50 dB typ (25 kHz) -45 dB max 25 kHz) -40 dB max (25 kHz) -40 dB max (12.5 kHz) -35 dB max (12.5 kHz) < 7 ms 50% at full power, 30 seconds maximum transmit time 17 T-96S Technical Manual MODEM OPERATION Interface Operation Data rates Modulation type RTS/CTS delay (Online diagnostics OFF) Bit error rate Protocol EIA RS-232C Simplex/half duplex 4800 b/s DRCMSK 9600 b/s DRCMSK 19200 b/s DRCMSK 30 ms -6 better than 1 x 10 at 1.0 µV at 9600 b/s Transparent to the user DISPLAY and CONTROLS 3 status LEDs Internal DIP switch RX, TX, PWR Channel select, test mode DIAGNOSTICS Online Offline Supply voltage, internal temperature, forward and reverse power, RSSI As for online, plus analog supply voltage, transmit test tones PROGRAMMABLE FEATURES 30 second timeout timer enable, bit rate, word length, parity, compatibility modes, frequency, channel, diagnostics on/off. FCC / IC CERTIFICATIONS FCC IC (DOC) VHF UHF 900 MHz 120 10503-201 PRELIMINARY 18 T-96S Technical Manual INDEX addressing adjustments equipment required location of controls maintenance intervals 11 11 14 11 half channel units ID number LED indicators 10 networks 10 operation performance verification 3, 6 RS-232 signal description RS-232 signal levels RTS/CTS timing 10 10 10 specifications 17 12 T-Base 120 10503-201 11 full channel units extended delay extended turnoff diagnostics offline online channel selection commands compatibility configuration bit dribble 13 19 T-96S Technical Manual
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