OPERATION MANUALMODE 4/MODE STEST SYSTEM

1-1-1 Page 1

Aug 1/98

SECTION 1 - DESCRIPTION

1. GENERAL DESCRIPTION AND CAPABILITIES

1.1 DESCRIPTION

The SI-1404/ATC-1400A (Mode 4/Mode S Test System) simulates an ATCRBS/Mode 4/ Mode S equipped Secondary Survei l lance Radar (SSR) ground stat ion. The Mode 4/ Mode S Test System provides pulse and Dif ferent ial Phase Shif t Keying (DPSK) modulated s ignals for test ing Air Traf f ic Control Radar Beacon System (ATCRBS), Mode 4 ( Ident i f icat ion Fr iend or Foe [ IFF]) and Mode Select (Mode S) transponders. Operat ion can be manual using f ront panel controls and switches or remote using a control ler through one of the paral lel or ser ies remote interface connectors.

1.2 FUNCTIONAL CAPABILITIES

The Mode 4/Mode S Test System has the fol lowing features and capabi l i t ies:

● ATCRBS (ATC) Function

● Mode S Sequence (SEQ) Funct ion

● ATCRBS Only Al l Cal l (Al l Cal l Short [ACS]) Funct ion

● ATCRBS/Mode S Al l Cal l (Al l Cal l Long [ACL]) Funct ion

● Inter lacing ( INTLCE) Funct ion to s imulate the real wor ld mixed interrogation environment

● Double Interrogat ion (DI) Funct ion

● Burst Funct ion

● ATC Monitor Pulse Funct ion for measur ing var ious Select ive Ident i f icat ion Format (SIF) or ATCRBS reply pulse character ist ics

● Mode 4 Funct ion (with or without external encrypt ion devices)

● Mode 4 Monitor Pulse Funct ion for measur ing var ious Mode 4 pulse character ist ics.

● Two RF Input/Output Connectors to provide Antenna A/Antenna B divers i ty. The connector for Antenna A has adjustable f requency and level control . The connector for Antenna B has set f requency and adjustable level control .

● Four- l ine by 40 column LCD to show var ious parameters and funct ions

● 24 control keys for numerical data entry, funct ion select ion and cursor control

● Variable interrogat ion rates for ATCRBS (0 to 7999 PRF), Mode S (0 to 2500 PRF) and Mode 4 (0 to 2500 PRF)

● Squit ter screens with decoded address, tai l number and country information

● Screen dump ( in ASCII) capabi l i ty through the SI-1404 RS-232 Connector

● SI-1404 Stand Alone mode providing l im ited s ingle antenna test ing abi l i ty without the ATC-1400A Transponder/DME Test Set.

● Programmable 1000- i tem sequence for upl ink and downlink format information

● Battery backup memory for saving up to f ive sets of test conf igurat ions

● Extensive interrogat ion pulse width, posit ion and ampli tude control

● Synchronous Phase Reversal (SPR) of fset control for Mode S

● Easy and quick Mode S address and address par i ty f ield changes

● Remote operat ion through the SI-1404 (RS-232 or GPIB) or ATC-1400A (GPIB)