The HT-4 has been designed to test high and low impedance aviation helmets, headsets, headphones and mikes.
The HT-4 is a microprocessor-based headset tester that can test:
FIXED WING HEADSETS
HELICOPTER HEADSETS
GROUND MECHANIC HEADSETS
WIRED GROUND CREW HEADSETS
WIRELESS GROUND CREW HEADSETS
WIRED AIRCRAFT PUSH BACK HEADSETS
BLUETOOTH AIRCRAFT PUSH BACK
HEADSETS
AUXILIARY MIKES
HIGH IMPEDANCE HEADPHONES
HEADSETS AND MICROPHONES EXTENSION WIRES
The HT-4 is a hands free and fully autonomous headset tester; it does not need, as other testers do, a headset in perfect condition to check other headsets or microphones.
Not having to keep depressed any switch to activate the tester gives the advantage of using both hands to find momentary interruptions in the wiring.
In case of distortion the HT-4 can quickly determine if the distortion is generated in the headphones side or the mike side of the headset.
The HT-4 has a Vu-meter that measures the strength of the audio signal coming from microphones or from the internal 1 Khz tone generator. In the Sound Pressure Level (SPL) test mode, the indication of the vu-meter is used to measure the sensitivity of microphones and compare them with others of the same type.
The HT4 can supply voltage for ANR headsets that work with energy supplied by aircrafts. It also allows to measure the current demand of these headsets and an aural alarm is activated when an overload occurs.
The HT-4 can test most of the headsets and helmets used in Aviation.f.e helmets MSA Gallet, headsets DAVID CLARK H10-76, H10-16, SENNHEISER HME100, PELTOR 72H540F-91,8006,8003, and others high and low impedance aviation pasive and active noise canceling helmets and headsets made by MSA , BOSE , DAVID CLARK , TELEX , SENNHEISER , PELTOR, LIGHTSPEED , CLARITY ALOFT, SIGTRONICS , PILOT AVIATION etc.
Features:
Test microphones sensitivity using the SPL-TEST mode.
Test microphones fidelity by amplifying its output, under normal speech conditions, and applying the signal to the phones or the front panel speaker.
Test headphones using an external microphone or an internal 1Khz sinusoidal tone.
Test mono and stereo headphones, PTT switches and extension wires.
Test wireless and ANR headsets.
The HT4 is electrically powered by its external ac adapter (90-240 VAC, 50/60 Hz with: USA, UK, Canadian or EU plug).
Accepts:
M642/4-1 (PJ-055B)
M642/5-1 (PJ-068)
M642/2-1 (PJ-051B)
U-174/U
LEMO (Bose)
XLR5 (Airbus)
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