MDS EL705 OEM Series Spezifikationen PDF herunterladen (Seite 2)

QUICK START GUIDE

Below are the basic steps for installing the transceiver. Detailed instructions are given in “Installation

Steps” on page 6 of this guide.

1. Mount the transceiver (see Figure 6 or Figure 7 for mounting dimensions)

2. Install and connect the antenna system to the radio

• Use only good quality, low loss coaxial cable. Keep the feedline as short as possible.

• Preset directional antennas in the direction of desired transmission/reception.

3. Apply DC power to the radio (10–30 Vdc @ 500 mA minimum)

• Measure the voltage source before connection.

• Observe proper polarity.

• Connect power to the power connector.

4. Set the radio’s basic conﬁguration with a terminal (PC or HHT) connected to

the INTERFACE port

• Pin 23 of the INTERFACE port must be grounded to place the radio in the control and programming

mode. (See Figure 12 on page 16 for a cable wiring diagram.)

• Set the transmit frequency (TX xxx.xxx).

• Set the receive frequency (RX xxx.xxx).

• Set the network address (ADDR xxx). All radios in a given network must have the same address.

• Set/verify the data rate using the BAUD command. The default setting is BAUD 9600 8N1. (Refer to

“TRANSCEIVER PROGRAMMING” on page 14 for command details.)

5. Connect the data equipment to the radio’s INTERFACE connector

• Connection to the radio must be made with a DB-25 Male connector. Connections for typical sys-

tems are shown below.

• Connect only the required pins. Do not use a straight-through RS-232 cable with all pins wired.

• Verify the data equipment is conﬁgured as DTE. (By default, the radio is conﬁgured as DCE.)

6. Verify proper operation by observing the LED display

• See Table 5 on page 13 for a description of the status LEDs.

• Reﬁne directional antenna headings for maximum receive signal strength using the RSSI command.

DB-25 DB-25

TRANSCEIVER

(DCE)

RTU

(DTE)

DB-9 DB-25

DB-9 to DB-25 ExampleDB-25 to DB-25 Example

TXD

RXD

TXD

RXD

GND

7 7

TRANSCEIVER

(DCE)

RTU

(DTE)

NOTE: Additional connections may be

needed in some installations.

See Installation for details.

RXD

TXD

RXD

TXD

GND

5 7

1 2 3 4 5 6 7 ... 47 48

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