Clearance Items

ADT-222A Air Data Test System

The ADT-222A Air Data Test System is a precise, stable, easy to use pressure control system designed to precisely simulate and accurately measure the pneumatic pressures associated with an aircraft in flight. Its operational and design features were selected to meet the needs of those who use, repair, or manufacture precision pneumatic avionic equipment. Consequently, it is ideally suited for laboratory, shop, or production use.

Dimensions

  • Height: 12.25 inches maximum
  • Width: 19.00 inches maximum
  • Length: 23.00 inches maximum
  • Weight: 7.58 pounds

Power (single phase): 115/230 volts + or – 10% RMS, 45 to 440 175VA maximum

Warm up Time: 30 minutes maximum
Operating Temperature: +50 to +110 Degrees Farenheit (+10 to +43 Degrees C)

Pressure Source: Dry air or dry nitrogen, regulated, at 50 + or – 5.0 psig.

Vacuum Source

  • Ps: 300. liters per minute free air displacement
  • Pt: 300. liters per minute free air displacement

Programming Interface: IEEE Standard 488-1975, ASCII

Fuse: 3.0 amperes slo-blo (115-volt units); 1.5 amperes slo-blo (230-volt units)

Lamps (pushbutton indicators): #327, 28 volts dc

FUNCTION CONTROL RANGE MEASURE RANGE
Ps 0.500 to 32.000 in. Hg
16.9 to 1083.6 MB		 0.320 to 40.000 in. Hg
10.8 to 1354.6 MB
Pt 1.500 to 90.000 in Hg
50.8 to 3047.7 MB 		0.500 to 100.000 in. Hg
16.9 to 3386.4 MB
Qc -30.500 to 89.500 in. Hg
-1032.8 to 3030.8 MB 		-39.500 to 99.680 in. Hg
-1337.6 to 3375.6 MB
Altitude -1800 to 90,000 ft
-549 to 27,432M 		-1800 to 100,000 ft
-549 to 30,480 M
Airspeed (CAS) 32 to 1000 knots
59.3 to 1852.0 KM/H		 23 to 1000 knots
42.6 to 1852.0 KM/H
Altitude Rate 0 to 40,000 ft/min [ 1 ]
0 to 12,190 M/min [ 1 ]
0 to 65,000 ft/min [ 2 ]
0 to 19,810 M/min [ 2]		  
Airspeed Rate 0 to 500 knots min [ 1 ]
0 to 926 KM/H/min [ 1 ]
0 to 700 knots/min [ 2 ]
0 to 999 KM/Hmin [ 2 ]		  
Mach Range   0.100 to 5.000

IFR ATC-1200Y3 DME/Transponder Bench Test Set

Specifications and Technical Summary

Transponder Section

  • Interrogation Rate: Variable from 50 Hz to 5000 Hz. PRF control accuracy ±5%.
  • Interrogation Modes: A/C, A, B, OJ and D, per FAA TSO C-74a. Pulse spacing relative to leading edge of P1:
    • Mode A - 8us ±0.05us
    • Mode B - 17us ±0.06us
    • Mode C - 21us ±0.06us
    • Mode D - 25us ±0.08us
    • Mode A/C - 8us ±0.06us; 21us ±0.08us
  • Transponder Pulse Characteristics: Pulse rise times should be 100ns or less for P1, P2 and P3. When the leading edge of P2 is within 0.6us or less of the trailing edge of P1, the rise time of P2 degrades to greater than 100ns. If P2 is within 0.3us of the trailing edge of P1, and P1 and P2 will deform. P2 may vanish.
  • Variable Pulse Spacing: P2 and P3 variable ±1.0us from each nominal position. Control accuracy ±0.05us at 0 setting and ±0.1us at +1 and -1us settings.
  • Variable Pulse Width: Variable width (of all three pulses simultaneously) from 0.4us to 1.2us. Control accuracy ±0.05us.
  • Side Lobe Suppression: Side Lobe pulse spaced 2us relative to P1. Spacing accuracy ±0.05us. Variable in amplitude relative to P1 from -10dB to +1dB, control accuracy ±5dB at +1dB and 0dB; and ±1dB at -6 and -10dB. P2 pulse may be turned off.
  • Pre Pulse: Selectable On or Off by Front Panel switch. Equal in Amplitude and Width to PI and P3. Time before P1 adjustable to 5us by the CAL Ø control
  • Calibration Mark Gen: Crystal controlled 1.0us or 1.45us time marks. Crystal tolerance ±.01%. 1us frequency = 1 MHz. 1.45us frequency = .689650 MHz. Output pulse amplitude adjustable to 1V P-P with 51 ohm load.
  • Sync Pulses:
    • TO: Negative sync pulses are provided approximately 5us prior to the leading edge of PI.
    • TD: Negative sync pulses are provided on the leading edge P3 for monitoring of all reply pulses.
    • Nominal amplitude is -15V.
    • Pulse width is 0.5 to 3us.
  • Transmitter Frequency Check: Transmitter frequency is measured by heterodyne method through diode mixers. Frequency settable to 500 kHz at l090 MHz.
  • Transmitter RF Power: Measured by calibrated slide-back power meter. Power at any point of the reply pulse may be measured Accuracy of power control is 12% at 2.5 kW and 15% watts.
  • Transponder % Reply: Meter readout 0 to 100%; Accuracy ±2%.
  • Suppressor Pulse: Coincident with P1 of interrogation pulse train. Pulse width is 50us, ±2us. Amplitude nominal 19 V, ±1 V.
  • Interrogation RF Pulse Risetime: Less than 100ns. Overshoot 5% maximum.
  • Interrogation RF Pulse Decay Time: Less than 100ns
  • RF On/Off Ratio: 80dB minimum 85dB typical.

DME SECTION

  • Squitter: Rate of pulse pairs variable from average of 50Hz to 5000Hz. Squitter has completely random time distribution. Average rate accuracy ±3.5%.
  • Ident System: Constant ident tone or coded IDENT signal. Tone frequency is 1350Hz, ±1%. Ident equalizing pulse spaced 100us from first pulse. Spacing accuracy ±3us. IDENT signal available every 30 seconds, ±2 sec., of characters I-F-R. Speed approximately 7 WPM.
  • Sync System:
    • TO: Negative sync pulses are provided approximately 1us after time of input interrogation.
    • TD: Sync Range - Negative sync pulses are provided (approximately 5us before) with each range reply pulse to permit viewing the reply pulses.
    • Sync Squitter - negative sync pulses are provided (approximately 5us before) squitter pulse to permit viewing squitter pulses.
    • Nominal amplitude of all sync pulses is -15V
    • Pulse width is 2 to 15 us.
  • Range System: Crystal controlled fixed range distances from -1 mile to 999.89 N.M. in 0.01 N.M. selectable increments. Range accuracy ±0.025 miles ±005% of range.
  • Velocity System: Crystal controlled velocity rates from 0 to 9990 KTS, in 10 KT selectable increments. Velocity accuracy 0.02%. Velocity range 0 to 300 N.M. with meter readout. Range readout accuracy ±5 N.M. Electrical slewing 0 to 300 N.M. in approximately 6 sec

NOTE

Due to discrete range steps in Velocity mode of .01 mile and to range jitter of .01 mile max, the maximum range uncertainty is .02 mile when measuring velocity on a time interval counter. If the range-change versus time measurement is made at 1000 knots for 60 seconds, the maximum velocity error due to the .02 mile uncertainty is ±12%. See table below.

A. When measuring at a 60 second time interval:

Velocity Maximum Error
100 1.2%
200 0.6%
500 0.24%
1000 0.12%
5000 0.025%

B. When measuring at a 30 second time interval:

Velocity Maximum Error
100 2.4%
200 1.2%
500 0.48%
1000 0.48%
5000 0.48%

C. When measuring at a 10 second time interval:

Velocity Maximum Error
100 7.2%
200 3.6%
500 1.44%
1000 0.72%
5000 0.144%
  • Percent Reply: Random Reply elimination with average count down rate variable from 20% to 100% replies. Control accuracy ±5%.
  • Tacan Simulation: Simulation only by amplitude modulating all output pulses with 60Hz. Modulation level variable from 0 to 50%.
  • Suppressor Pulse: Output rate is a constant value controlled by Squitter PRF control. Pulse width is 50us ±2us. Amplitude nominal 19V ±1V.
  • R-NAV Pulses: P1 at time of interrogation; P2 at time of reply. Pulse spacing at 0 miles is 50us in X ch. ±0.25us, and 56us in Y ch, ±0.25us. Pulse width is 7us, ±3us, amplitude l5 v ±3V.

  • Decoder: An input decoder is incorporated which will accept input pulse pairs only with spacings between:

    in X ch - 8.5us to 15.5us

    ±0.5us.

    in Y ch - 33.5us to 38.5us

    ±1.0us

DME Pulse Widths Characteristics

DME pulse widths should be 3.5us ±0.25us when on a frequency of 1030 MHz. Typical pulse width variation with frequency is ±0.5us. For "X” channel operation the spacing cannot be operated in the -4us, -5us or -6us position without severe pulse distortion because Pl and P2 are being overlapped.

  • Output Pulse Spacing: In X channel 12us, ±0.2us. In Y channel 30us, ±0.2.us. Pulse spacing is adjustable from nominal 12 or 30us in ±0.5, ±3, ±4, ±5 and ±6us steps. Accuracy of incremental spacing is ±0.2us. X or Y channel spacing by VCR frequency selected.
  • Echo Pulses: Echo Pulse pair injected 30 N.M. from time of interrogation. Range accuracy of echo pulses ±0.5 N.M. Echo pulse amplitude variable from -10 dB to + 1 dB, control accuracy ±0.5 dB at -10 dB, -6 dB, 0 dB, and +1 dB, relative to normal reply pulse. Normal reply pulses cannot be used within ±5 N.M. of echo pulses. Echo pulse pair may be turned off. All output pulses are square instead of Gaussian shaped when the echo system is activated.
  • PRF Measurement: Interrogation rate of DME read out on meter on 0-30 and 0-300 PRF ranges. PRF accuracy ±3% full scale.
  • Modulator Pulse Output: Gaussian-shaped reply pulse pair timed within ±0.3us of RF reply pulses. Amplitude adjustable from 0 V to -10.5 V. D.C. restored to peak of 0 V. Spacing same as RF pulses.
  • Transmitter Frequency Check: Transmitter frequency is measured by heterodyne method through diode mixers. Used only to verify proper on-channel frequency to ±1 MHz.
  • Transmitter RF Power: Measured by calibrated slide-back power meter. Power at any point of the interrogate pulse may be measured. Accuracy of power control is 12% at 2.5 kW and 15% at 50 watts.
  • DME RF pulse output: Gaussian-shaped reply pulses 3.5us ±0.25us, wide at 50% amplitude point.
  • RF On/Off Ratio: 85 dB minimum 95 dB typical.

Signal Generator Section

  • Frequency: 950 MHz ~~1225 MHz
  • Frequency Control:
    • In GHz position, the front panel frequency switch indicates generator frequency directly in MHz providing decimal point is considered invalid. Phase lock range typically 960 MHz to 1215 MHz. Frequency selected in 1 MHz. increments. Output frequency accuracy ±.0008%. DME spacing always X ch in GHz mode.
    • Paired VOR channel readout: Front panel frequencies switch indicates VOR frequencies from 108.00 to 117.95 MHz, and 133.30 to 135.95 MHz selectable in 50 kHz increments. Output frequency from 962 MHz to 1213 MHz paired to VOR channels. Phase lock range 962 to 1213 MHz. Output frequency accuracy ±.008%. All XXX.00 channels select X ch. spacing; all XXX.05 channels select Y ch, spacing.
    • Variable frequency: Range 950 MHz to 1225 MHz, Drift rate typically less than 2.0 MHz in a one-hour period. An external counter capable of counting 3.25 MHz can display the output frequency. Add 9 MHz; to the counter reading and multiply the sum by 100 to obtain; the output frequency.
  • Output Leveling:
    • For sets S/N 1500 and on, RF output leveled to ±1.0dB for any one attenuator setting in 962 to 1213 MHz frequency range.
    • For sets prior to SIN 1500, RF output leveled to ±2.0 dB for any one attenuator setting over frequency range 962 to 1213 MHz.
  • RF Output Level: Continuously variable from 0 dBm to -110 dBm. Attenuator accuracy ±1.5 dB referenced to Output Leveling. Output level is calibrated at XMTR/REC connector. Harmonic content of output 70 dB down from attenuator is non-linear from 0 dBm to -30 dBm. Use of attenuator calibration curve is mandatory for this region of operation.

General

  • AC Power Requirements: 105 to 120 VAC or 220 to 250 VAC 50 to 400 Hz. Cooling fan 50/60 Hz only.
  • Weight 36 pounds
  • Dimensions 7.5” high, 16.75" wide, 18.375” deep

IFR NAV-401L Nav/Com Test Set

Specifications and Technical Summary

Signal Accuracy:

  • VOR: 3600 digitally derived courses, one each 0.1 degree. Course accuracy ±0.1 degree. 30Hz ± .02%, 9.96 KHz ± .2%, modulated ±480Hz, and ±30Hz. Modulation of each signal individually adjustable, from 0 to 30% +1%.
  • LOC: 90Hz and 150Hz ±.02% phase locked or phase variable in digitally, selectable steps Mod 20% ±.5% (90Hz and 150Hz tone) and 30% ±1% for each MKR Tone. (Adjustable 0-40%).
  • DDM-LOC: .093, .155, .200 DDM and tone delete. Centering accuracy ±.0025 DDM. Variable control ±0.4 DDM.
  • G/S: 90Hz and 150Hz ±.02% Phase Locked or Phase Variable In digitally selectable steps. MOD 40% +1% each tone (90Hz and 150Hz) (Adjustable 0 to 80%).
  • DDM-G/S: .092, .175, .200 DDM and tone delete. Centering accuracy ±.0025 DDM. Variable control ±.4 DDM.
  • MKR: 1020 Indent tone, 400Hz, 1300Hz and 3000Hz tones selectable by tones select switch located on front panel. Modulation for each tone is 95% ±2%.

    NOTE: MKR tones can b generated internally in VOR, LOC and COMM mode position. Modulation 30% ±1%.

  • Power Meter: Measurement COMM transmitter power in two ranges - 0 to 10W and 0 to 100W. Accuracy +5% of F.S. Input Power versus time limits: 20W CW level continuous duty.
    • Power ON Minutes OFF Minutes
    20-40 5 20
    40-80 1 20
    80-100 .5 20

  • Counter:
    • Measures: Internal Signal Generator Frequency COMM Transmitter Frequency. External. signals from 1 MHz to 300 MHz min. Selected VOR bearing as a check on the digital bearing selecting system.
    • Clock Oscillator Accuracy: ±.002%. Typically the oscillator is stable to ±.0005% over normal temperature and period usage.
    • Input Impedance: 4.7K ohms and 100pf for audio frequencies. 50 ohm AC terminated for RF frequencies.
    • Sensitivity: 0.15V RMS at 10Hz., .28V RMS at 250 MHz., .50V RMS at 335 MHz.
    • Max. Input: 150V peak at audio and 250mW maximum power at RF
  • Portable Operation: A 2.0 A.H. Nicad battery system will permit ramp operation for 2 hours (with the counter off). The battery is charged whenever the set is plugged into an AC Power source. The battery charger is designed for continuous duty.
  • AC Power Requirements: 105 to 120 V.A.C. or 220 to 250 V.A.C 50 to 400Hz, 30 watts.
  • Weight: 19 pounds complete
  • Dimensions in inches (case assembled):
Drawing