Section 1.0 Introduction; Equipment Description; General Specifications - Trans-Cal SSD120 M Series Installation And Calibration Manual

Section 1.0 Introduction

This manual provides detailed installation, calibration and operating instructions for
Trans-Cal Industries' Modular Altitude Encoder/Digitizer Model SSD120-(XX)M.

1.1 Equipment Description

Approved under F.A.A. TSO-C88a, the Model SSD120-(XX)M is an all
solid state electronic device which, when installed within a flight altimeter
and connected to the aircraft's electrical system, converts pressure altitude
information into parallel and serial digital data.
The parallel digital data is set forth in the (ICAO) International Standard
for SSR Pressure Altitude Transmission. In accordance with U.S. National
Standards for Common System Component Characteristics for the I.F.F.
Mark X (SIF)/Air Traffic Control Radar Beacon System SIF/ATCRBS.
The serial altitude data is provided on (2) two asynchronous RS232 output
ports. The serial data protocol is individually selectable for each port (refer
to Table V, and §4.4)
This unit is also designed to be programmed to match the flight altimeter
error curve utilizing an IBM compatible PC with an available serial port.

1.2 General Specifications

Operating voltage:
Operating current:
Operating temperature/warm-up time:
Model SSD120-(XX)M: -30° to +70°C No warm-up time required.
Storage temperature all models (non-operating): -55° to +85°C.
Weight: 3.82 oz. (108.2 grams)
Model SSD120-(XX)M
Model SSD120-(XX)M
+9 to 30 VDC.
0.1 Amperes Max.
4