Service manual

Service Manual SD170E Series

Page 8 of 44

Installation

The SD-170E Series Radio Modems usually requires mounting in a suitable location.

Attention should be given to the heat sinking of the radio if prolonged transmission is

required, see Section 2, which also includes details of the mounting hole dimensions.

Note: Continuous transmission is not possible at high power (5W) without a suitable heat

sink.

The SD-170E Series Radio Modems can be used with helical or whip aerials or may be

connected to an external antenna, via a suitable connecting cable.

External Connections

Connection is made to the SD-170E Series Radio Modems via an external 50 ohm BNC

socket (RF signal) and a high density 15-way “D”-type socket (DB-15 connector; control

and data signals) with 4-40 UNC threaded jack posts for more permanent connection.

Besides, SCN-12 type circular connector is added to separate power line from data and

analogue signals of DB-15 connector.

DATA MOD IN 1

Data OUT (AF)

PTT IN

VIN(12V)

SERIAL OUT (PROG.)

BUSY

MIC IN (AF)

SERIAL IN/OUT PROG

SPK OUT

SERIAL DATA IN (OPT)

SERIAL DATA OUT (OPT)

SERIAL BUSY OUT (OPT)

GPS DATA IN (OPT)

DGPS DATA IN (OPT)

GPS DATA OUT (OPT)

DB-15 CONNECTOR

BODY GROUND

************IMPORTANT – PIN 14 is GROUND*************

Fig. 1 Pin-outs of DB-15 connector

Fig. 2 Front panel