Connectors and LEDs

Antenna connector

The radio has a single TNC female type antenna connector with impedance of 50 Ohm.

The antenna should always be connected when the power is on. Removing the antenna while the transmitter is on may damage the power amplifier inside the transmitter.

Power supply

The radio will consume electric power when connected to a power supply. The amount of power consumed depends on the operational mode. Highest power consumption is while the transmitter is active, and output RF-power level is set to maximum. Even higher power is drawn from the power supply in a moment when the radio is being connected to a power supply. This so-called inrush current can be several times higher than normal current consumption, but will last only few milliseconds. For proper operation it is crucial to ensure that the power supply has output power rated to higher than the maximum power consumption of the device and that the power supply can handle short inrush currents properly.

The TDL510 radio operating voltage range is +7 to +27.5 V DC / -15 % / +20 %.

As a result of new revision of safety standard IEC600001, voltage range is now marked with wider tolerance limits. For minimum and maximum operating voltage, see Specifications.

As an increased safety feature, it is recommended to add a fuse between the power supply and the TDL510. This ensures that both, the device and the power supply, is protected against over current situations. The recommended fuse size is 2 Amps.

The operating voltage range is also shown on the back of the radio:

LED modes

There are five LEDs that show the status of the serial port and radio:

LED

Indication

Off

Red

Orange

Green

RTS

RTS-line status (D15 Pin 13)

Inactive

Active

-

-

CTS

CTS-line status (D15 Pin 6)

Inactive

Active

-

-

TD

TD-line status (D15 Pin 11)

Indicates that the radio is receiving data via serial port.

No data

Data

-

-

RD

RD-line status (D15 Pin 9)

Indicates that the radio is sending data via serial port.

No data

Data

-

Test Tx active

CD

Indicates the status of the radio interface.

Note that the status of CD-line (D15 Pin 2) may differ from the status of CD LED.

No signal

Transmitter is ON

Noise

Reception

Base

TD will flash red at 1 Hz (data incoming from base on port 1), then CD will flash red immediately (radio Tx)

 

 

 

 

Repeater

CD will flash green (radio Rx), then RD and CD will flash red immediately (data sent to port 1 and radio Tx)

D15 connector

15-PIN FEMALE D CONNECTOR PINOUT:

The I/O column below denotes the direction of the signal:

  • "IN" is from DTE (Data Terminal Equipment) to the radio.

    "OUT" is from the radio to DTE.

PIN

Name

I/O

Level

Explanation

1

DTR

IN

MAX

+27.5 V

Data Terminal Ready. This pin can be used to wake-up the radio from standby mode.

>+3 V DC or not connected = ON
<+0.6 V DC = STANDBY. By default, this pin can be left unconnected.

2

CD

OUT

RS-232

Carrier Detect

3

RD2

OUT

RS-232

Port 2 receive data

4

TD2

IN

RS-232

Port 2 transmit data

5

-

-

-

Not used.

6

CTS

OUT

RS-232

Clear to send. This signal indicates that the radio serial interface is ready to receive data from DTE.

7, 8

GND

-

-

Operating voltage ground / signal ground.

Signal ground has a galvanic connection to the modem casing.

9

RD1

OUT

RS-232

Port 1 receive data to DTE from the radio.

10

DSR

OUT

RS-232

Data Set Ready. Indicates that the radio is ON.

11

TD1

IN

RS-232

Port 1 transmit data from DTE to the radio.

12

MODE

IN

MAX

+27.5 V

<2 V DC or connected to ground = programming mode

>3 V DC or not connected = Data transfer mode

Programming mode is for bringing the modem to a serial port state: Data port 1 38400N81. By default, modem is Data transfer mode in a case Pin 12 is floating.

13

RTS

IN

RS-232

Request To Send from DTE.

RTS and CTS signals apply to the selected data port only (port 1).

14, 15

Vb

-

See Specifications

Operating voltage 7 to 27.5 V DC

Unused pins can be left unconnected.