Aeroflex (IFR / Marconi) ATC-1400 Aviation Test Set, DME & ATC  

The Aeroflex / IFR ATC-1400 Aviation Test Set is a microprocessor based test set designed for testing and calibrating DME (Distance Measuring Equipment), ATC (Air Traffic Control) Transponder aircraft equipment, and ARINC 568 Digital DME Indicators. It can be operated manually using front panel controls and switches, or remotely by ATE (Automatic Test Equipment) control through the GPIB (General Purpose Interface Bus).

All necessary test signals and their variations are generated within the test set. Only an oscilloscope is required as peripheral equipment.

The IFR / Aeroflex ATC-1400 incorporates the following capabilities:

• Signal Generator:
  • Frequency Select Modes: Desired L-Band Output Frequency can be selected by direct MHz, VOR-paired, and TACAN channel designation. The desired frequency is selected in 1 MHz increments from 962 MHz to 1213 MHz.
  • RF Capability: The desired frequency can be varied ±9.99 MHz in 10 kHz increments.
  • Manual or Automatic Stepping: The selected frequency can be varied manually 1 MHz steps or automatically in 1 MHz steps , upward in frequency, at a rate determined by a front panel control.
  • Suppressor On/Of: The mutual suppression output can be switched ON or OFF. Suppression pulse level is adjustable on front panel.
• DME Mode:
  • Range Delay: Switch selectable -1 nmi Range for indicator calibration. When selecting -1 nmi feature, 1 nmi is subtracted from the programmable range of 0 to 399.99 nmi. Actual range of UUT is displayed on DISPLAY SELECT Readout (43), not selected range.
  • Velocity: Selected as inbound or outbound. Inbound velocity decrements selected range to zero and then increments range to 400.00 nmi. Outbound velocity increments selected range to 400.00 nmi, then decrements to zero nmi.
  • Acceleration: Non-zero acceleration decrements selected velocity to 0 then increments to 4000 KTs.
  • Squitter: Squitter is digitally implemented to provide stable rate and distribution, as well as repeatability.
  • TACAN Simulation: When TACAN is selected, output pulses are AM modulated with 15 and 135 Hz signals. TACAN main burst and auxiliary burst signals are generated representing a bearing of 180°. External AM and pulse modulation inputs are available on the rear panel.
  • Echo. Pulses: When selected, ECHO replies are generated at approximately 30 nmi in response to all interrogations.
  • Pulse Characteristics: DME pulses are formed by filtering and not by pin diode switching; this results in better representation of a gaussian shaped pulse. Pulse spectrum has adequate side lobe shaping to allow adjacent channel rejection measurements.
  • DME Serial Data Interface: The serial BCD distance word is generated by the test set to correspond to range distance programmed in the test set. This serial BCD word is available at the rear panel through a 25 pin D type connector. This interface is designed to be compatible with ARINC Characteristic 568 requirements for digital signals. In addition, there is an input on the back panel of the test set to receive the serial BCD distance data from the DME UUT and be displayed on DISPLAY FUNCTION Readout (43).
  • Frequency Channeling Outputs: 2-out-of-5 VOR Paired Channel Frequency is available on the rear panel for control of DME UUT when test set is in automatic frequency stepping mode.
• Transpoder Mode:
  • Modes: Modes 1, 2, T, A., B, C, 0, AC1, and AC2 are available. Mode AC1, and AC2 alternate between Modes A and C. AC1, will result in XPDR Code data in 4 digit Octal Code for Mode A response to be displayed.. AC2 Mode will have altitude data from Mode C response displayed in feet (X1000).
  • Variable Pulse Spacing: The P2 and P3 pulse can be varied in the plus or minus direction or maybe selected to the calibrated spacing by individual switches. P2 and P3 can not be varied simultaneously at different amounts, as there is a single selector for deviation.
  • Pulse Width: Pulse width generated in transponder mode can be varied from .2 µs to 1.95 µs, or selected for a calibrated width.
  • Side Lobe Suppression: Amplitude of the P2 SLS (side lobe suppression) pulse can be selected from -19 to +6 dB, relative to P1, in 1 dB increments. P2 pulse can be switched ON or OFF by a selector switch.
  • Interference/DBL Interrogation: The interference pulse and double interrogation functions are combined in one switch selector and cannot be selected simultaneously. The function can be switched ON or OFF by a selector switch. The double interrogation may not be any closer than 24.5 µs to P3 of the first interrogation and is independent of transponder mode selected.
  • UUT Pulse Spacing Detector: Transponder replies are verified for proper pulse position by selection of a narrow window, using a rear panel switch. In narrow position, the pulses must be within ±100 ns of their designated position to be recognized and displayed in XPDR Code Display readout. A wide window is provided by the rear panel selector switch when pulse position accuracy verification is not desired.
• UUT Measurements:
  • Transmitter Frequency Counter: Average frequency of one (1) pulse in a reply (XPDR Mode) or an interrogation (DME Mode) is counted and continuously displayed. In DME Mode, either P1 or P2 can be selected to be counted by a selector switch; in XPDR Mode, either F1 at. F2 can be selected.
  • Transmitter Frequency Discriminator: Frequency variation within the measured pulse may be viewed at the discriminator output jack. A reference voltage is supplied after the measured pulse, which represents the average frequency displayed on UUT transmitter frequency counter display.
  • Transmitter Power Meter: Transmitter power is measured by a peak power detector and displayed on a front panel readout. The resolution of the front panel readout is 1 watt: In DME Mode, either P1 or P2 is measured. In XPDR Mode, either F1 or F2 is measured.

MSRP: $29,995.00

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