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Avionics
S-1403DL/MLD Mode S Accessory Unit
• Easy to operate
• Control via IEEE.488 GPIB v13 or
ATC-1400A
• Support for MTL, COMM C and COMM D
• User defined screens for user specific
tests
• Two-year limited warranty
Aeroflex is a leader in the design, manufacture
and marketing of Avionics test systems.
The S-1403DL/MLD Mode S accessory unit is
designed to interface with the ATC-1400A
Transponder/DME Test Set. The
S-1403DL/MLD/ATC-1400A (Mode S Test
System) simulates an ATCRBS/Mode S equipped
Secondary Surveillance Radar (SSR) ground sta-
tion. The Mode S Test System provides pulse
and Differrential Phase Shift Keying (DPSK)
modulated signals for testing Air Traffic Control
Radar Beacon Systems (ATCRBS) and Mode
Select (Mode S) transponders.
Operation
The S-1403DL/MLD Mode S accessory unit supports the new
Mode S Data Link and ADS-B (extended DF17 squitter). The “DL”
is backward compatible with the “C” model. Current ATE programs
implemented on the S-1403C will operate with the S-1403DL/MLD
without program changes. The unit provides additional pulse code
modulation, as specified by RTCA/DO-181 to the ATC-1400A for
testing ATCRBS and Mode S transponders including Data Link,
ADS-B and MLD (Multi Level Diversity) requirements. The
S-1403DL/MLD may also be used as a stand-alone unit to perform
limited Mode S tests.
Interconnect
The S-1403DL/MLD may be hard mounted to the ATC-1400A
using supplied hardware. Electrical interface to the ATC-1400A is
via the Aeroflex and AUX buses using two 25-way interconnect
cables and three SMB-to-SMB coaxial cables. Line power is
switched through the S-1403DL/MLD for synchronized power-up
of both test sets.
Standard Features
• Over 30 new screens, including support for MTL, Comm
C and Comm D formats
• Remote Operation via IEEE 488.2-1987 or RS-232
• Rapid updating of data fields using continuous rotation
"SLEW" knob or keypad
• Rear panel interconnects for control and signal monitor-
ing
• Control of P
2
, P
3
, P
4
and P
6
width, offset and amplitude
• Fixed frequency/fixed level RF output for diversity anten-
na testing
• Mode S interrogation rates up to 2500 PRF burst
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