Software-Controlled Digital Communications Preliminary MDS 05-4659A01, Rev.
OPERATIONAL & SAFETY NOTICES RF Exposure Concentrated energy from a directional antenna may pose a health hazard to humans. Do not allow people to come closer to the antenna than the distances listed in the table below when the transmitter is operating. More information on RF exposure can be found online at the following website: www.fcc.gov/oet/info/documents/bulletins. Antenna Gain vs. Recommended Safety Distance (MDS SD9 Radio) Antenna Gain 0–5 dBi Minimum RF Safety Distance 0.46 meter 5–10 dBi .
INTRODUCTION This guide presents basic installation and operating instructions for the MDS SD9 Series wireless transceiver. The transceiver (Figure 1) is designed to operate in point-to-multipoint environments, including utility automation/distribution systems, and other telemetry functions. These radios are software-configurable to provide flexible operation in a variety of applications using one hardware platform.
Invisibleplaceholder Figure 2. Front Panel Connectors & Indicators Connector functions (left to right) in Figure 2 are as follows: • POWER • LAN (RJ-45) • COM1—Management/Diagnostics (DB-9) • COM2—Payload Data (DB-9) • ANTENNA (TNC) A list of LED functions is presented in Table 3 on Page 10. Accessories Table 1 lists available accessories for the transceiver. The contents of a shipment may have been modified to reflect customer-specific requirements given at the time of order.
Table 1. SD9 Available Accessories Accessory Description Part Number DC Power Plug, 2-pin, polarized Mates with power connector on radio. Screw terminals provided for wires, threaded locking screws to prevent accidental disconnect. 73-1194A39 Retrofit Kit, Digital Contains all items needed to replace an existing MDS x710A/C/M digital transceiver. 98-6190ACC1 Retrofit Kit, Analog Contains all items needed to replace an existing MDS x710A/C/M transceiver used in the analog mode.
ANTENNA SYSTEM TRANSCEIVER POWER SUPPLY 10.5–16 VDC @ 2A Negative Ground Only E IN DL S OS E FE -L OW L DATA TELEMETRY DEVICE Figure 3. Typical Remote Station Arrangement Installation Steps Below are the basic steps for installing the transceiver. In most cases, these steps alone are sufficient to complete the installation. Refer to the Reference Manual for additional details, if required. 1. Mount the transceiver to a stable surface using the brackets supplied with the radio.
2.75˝ (7 cm) Invisibleplaceholder 7.25˝ (16.99 cm) Figure 4. Transceiver Mounting Bracket Dimensions CAUTION POSSIBLE EQUIPMENT DAMAGE Using screws longer than 1/4 inch (6 mm) to attach the brackets to the radio may damage the internal PC board. Use only the supplied screws. 2. Install the antenna and feedline for the station. Aim directional antennas toward the master station.
vided with each unit (see Figure 5). Strip the wire leads to 6 mm (1/4 inch) and insert in the wire ports. Be sure to observe proper polarity as shown in the Figure 5. Invisibleplaceholder Lead Binding Screws (2) Wire Ports (2) Retaining Screws (2) (Polarity: Left +, Right –) Figure 5. DC Power Connector CAUTION POSSIBLE EQUIPMENT DAMAGE The transceiver is designed for use with negative-ground systems only.
Invisibleplaceholder Transceiver PC Running Terminal Session To COM1 Port Figure 6. PC Configuration Setup c. Set the transmit frequency by entering TX xxx.xxxx, where xxx.xxxx is the frequency in MHz. Press ENTER . The response PROGRAMMED OK indicates successful entry. d. Set the receive frequency by entering RX xxx.xxxx, where xxx.xxxx is the frequency in MHz. Press ENTER . The response PROGRAMMED OK indicates successful entry. e.
SOFTWARE COMMAND SUMMARY Table 2 lists software commands commonly used during initial installation and setup of the transceiver. A complete list of commands and detailed descriptions is contained in the Reference Manual. Table 2. Command Summary Command Name 8 Function BAUD [xxxx xxx] Sets radio’s serial data interface rate/format. Default setting is BAUD 9600 8N1. DATAKEY Keys the transmitter on receipt of data. DKEY Dekey the radio (transmitter OFF). This is generally a radio test command.
Table 2. Command Summary (Cont’d) Command Name Function STAT Display radio status and alarms. TEMP Display the internal temperature of the radio in degrees C. TX [xxx.xxxx] Set or display the transmit frequency.
Invisibleplaceholder Figure 7. LED Indicators Table 3. LED Status Indicators LED Name PWR Description • Continuous—Power applied, no problems detected. • Rapid flash (5 times-per-second)—Alarm indication. LAN • Continuous—Local area network detected. • Flashing—Data is being transmitted and received. • Off—LAN not detected or excessive traffic is present. COM1/COM2 LINK The COM LEDs show activity on the serial payload data port(s). The left LED shows TX data and the right one shows RX data.
If more than one alarm exists, the word MORE appears on the screen. To view additional alarms, press ENTER . Major Alarms vs. Minor Alarms Major Alarms—report serious conditions that generally indicate a hardware failure, or other abnormal condition that will prevent (or seriously hamper) further operation of the transceiver. Major alarms generally indicate the need for factory repair. Contact your factory representative for assistance.
Table 4. Event Codes (Cont’d) Event Code Event Class Description 18 Minor A data framing error has been detected on the COM2 INTERFACE connector. This may indicate a baud rate mismatch between the radio and the RTU. 26 Minor The DC input voltage is out-of-tolerance. If the voltage is too far out of tolerance, operation may fail. 31 Minor The transceiver’s internal temperature is approaching an out-of-tolerance condition.
Invisibleplaceholder > RXD 2 RXD DB-9 MALE (RADIO SIDE) 3 TXD 2 TXD 3 < DB-9 FEMALE (COMPUTER) GND 5 5 GND Figure 8. COM1 Wiring to Computer NOTE: To prevent unintended keying of the transmitter during management activities, set PTTSIG to OFF, or do not connect to Pin 6 of the COM1 port.
NOTE: The radio is hard-wired as a DCE device. Table 5. COM2 Pin Descriptions—RS/EIA-232 Pin Input/ Number Output 1 OUT Pin Description DCD (Data Carrier Detect/Link)—A low indicates signal received. Digital Modem Selections: Digital carrier detect Analog Modem Selections: Squelch indicator RXD (Received Data)—Supplies received data to the connected device. 2 OUT 3 IN TXD (Transmitted Data)—Accepts TX data from the connected device.
SPECIFICATIONS GENERAL Frequency Range*: MDS SD9: 920–960 MHz * Specific frequency authorizations are dependent on the type-approval of radio. Consult the factory for details. RECEIVER Maximum Usable Sensitivity: –110 dBm at 1x10–6 BER (Preliminary) Bandwidth: 12.5, 25 kHz TRANSMITTER Carrier Power: 0.1 Watts to 5 Watts Duty Cycle: Continuous Output Impedance: 50 Ω Channel Spacing: 12.5, 25 kHz FCC Emission Designators: 12.5 kHz B/W: 25.
DIAGNOSTICS INTERFACE Signaling Standard: Connector: RS-232 (COM1) RS-232/RS-485 (COM2) COM1—DB-9F COM2—DB-9F Specifications are subject to change without notice or obligation. 16 MDS SD9 Startup Guide 05-xxxxA01, Rev.
Installation Guide
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