MD50C-5 C-Band Radar Transponder

Overview

Key Tech Specs

Frequency Range: 5.4 to 5.9 GHz
Frequency Separation: 50 MHz min.
Impedance, Input/Output: 50 ohms nominal
Reverse Polarity Protection: Built-in series diode protection against damage from DC input power reversal
Voltage Transient Protection: Internal power supply stabilizes transients to the normal operating voltages
Short and Open Circuit Protection: Built-in to provide antenna mismatch protection
Input Voltage: 22 to 32 VDC, Floating from ground
Input Current: 0.40 Amps maximum to 2600 pps
Recovery Time: 50 μsecs. maximum
Blanking: Built-in circuitry prevents reply during recovery time

Design: Direct RF-to-video detection
Sensitivity: -65 dBm minimum
Frequency Tuning: Three preselector controls externally accessible upon removal of seal screws
Tuning Range: 5.4 to 5.9 GHz
Sensitivity Bandwidth: Greater than -65 dBm over ±3 MHz around assigned frequency
Dynamic Range: +10 to -65 dBm
Bandwidth (3dB): 11 ±5 MHz
Image Rejection: Non-existent image frequency (no local oscillator)
Pulse Decoder: Single or double, internally selectable
Pulse Width: 0.25 to 5.0 μsecs. single; 0.25 to 1.0 μsecs double
Pulse Rise Time: 0.1 μsec. maximum single or double
Double Pulse Coding: Spacing adjustable between 3.0 and 15.0 μsecs
Second Pulse Spacing: Accepts ±0.15 μsecs. Rejects ±0.3 μsecs
Random Triggering: 10 pps maximum

Power Output: 50 Watts peak minimum
Output device: Triode cavity oscillator (Limited operating life of 200 hours minimum, which includes all periods of DC power applied to the transponder.)
Frequency Tuning: Single control externally accessible upon removal of seal screw
Tuning Range: 5.4 to 5.9 GHz
Frequency Stability: ±5.0 MHz
Pulse Width: 0.5 ±0.1 μsec
Pulse Width Jitter: 0.01 μsec. maximum
Pulse Rise/Fall Time: 0.1/0.2 μsec. max. (10 to 90%)
Spectrum: The reply pulse RF spectrum bandwidth (in MHz) will not exceed 3.0/pulse width (in μsecs.) measured at the 1⁄4 power level points
PRF: 100 pps to 2600 pps typical
Reply Delay: Adjustable from 2.0 to 6.0 μsec, (2.5 μsec typical)
Delay Variation: 0.03 μsec. maximum deviation from -30 dBm value for input signals levels between 0 and -60 dBm
Delay Jitter: 0.02 μsec. maximum 0 to -55 dBm, 0.05 μsec maximum -55 to -65 dBm
Interrogation Replies: 99% minimum for input signal levels between +10 and -65 dBm
Duty Cycle: Up to 0.002 (0.2%)
Overinterrogation Protection: 3200 pps typical

The transponder meets the requirements of MIL-STD-810
Vibration Sine: 5 to 10 Hz, 0.20 inch double amplitude; 10 to 18 Hz 1g; 18 to 81 Hz 0.06 inch double amplitude; 81 to 2000 Hz, 20g
Vibration Random: 16.9g rms, 0.008g2rms/Hz at 20 Hz, 0.20g2rms/Hz from 100 Hz to 1000 Hz, 0.05g2rms/Hz at 2000 Hz
Temperature, Operating: -40°F (-40°C) to +160°F (+71°C) standard, (-54°C to +85°C available)
Temperature, Storage: -80°F (-62°C) to +185°F (+85°C)
Shock: 100g (6 milliseconds) in any axis, sawtooth, 120g (4 milliseconds) in any axis, sawtooth
Altitude: 760 mm of mercury (sea level) to 0.04 mm of mercury (230,000 feet altitude)
Humidity: Any, up to 100% including condensation due to temperature changes
Acceleration: 50g applied along any axis for 1 minute
RFI/EMI: MIL-STD-461, tested per MIL-STD-462
Pressurization: 22 psi bubble leak test

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MD50C-5