Transcript
Data Sheet HIB I (Code 6002) Headset Interface Box Overview In conjunction with the communication analysis system ACQUA and the measurement front end MFE VI.1, the Headset Interface Box HIB I can serve as a reference front end for measuring and assessing the quality and standard compliance of headsets and the headset functionality of telephones. HIB I is especially suited for measurements according to ITU-T P.381. Moreover, HIB I offers a monitor mode which allows monitoring the audio signals between the headset and the telephone. HIB I is automatically configured and controlled by ACQUA. Front and rear view of Headset Interface Box HIB I
DESCRIPTION
KEY FEATURES
APPLICATIONS
Telephone Measurements:
• Simulates both headphones (including different impedances) and headsets (additionally including microphone paths) as well as the headset functionality of telephones • Loop/Monitor mode • Configuration and Control via ACQUA over USB-to-serial cable (> 5m cable length possible) • Rechargeable Battery (charged via Micro USB, switch-off triggered by ACQUA during measurement to avoid noise and ground loop, two LEDs indicate Power On/Off and battery charging) • Input and output gains +30 ... –95 dB (in 0.5 dB steps)
• Automated measurements of headsets and telephones (in conjunction with ACQUA and MFE VI.1) • Measurements according to ITU-T P.381
Reference Telephone Features:
HIB I = Reference Telephone, DUT = Headset:
In this mode, the device under test (DUT) is the telephone, while HIB I simulates a reference headset with selectable load impedances. Thus, HIB I allows to test the effect of various headphone impedances on the speech and audio quality performance of headset/ telephone combinations (e.g. behavior of the audio amplifier). The telephone is connected via the adapter cable CJB II to the BNC connectors on the front plate of HIB I. Headset Measurements: In this mode, the DUT is the headset, while HIB I simulates the relevant part of a reference telephone. The headset is directly connected to the 3.5 mm jack socket on the front plate of HIB I. For measuring headsets with a second microphone, HIB I offers a connection possibility via an individual adapter cable. Additional Measurement Modes: In “Loop” mode, a connected headset can be routed to the connected telephone via HIB I without having to change cable connections. Optionally, a monitor function can be activated in HIB I in this mode which allows simultaneous transmission of the audio signals to the connected MFE.
• Headset microphone supply voltage 0.6 ... 3.8 V (in 25 mV steps). In particular, 2.6 V at 2.2 kOhm can be selected as stipulated by ITU-T P.381. • Automatic recognition and switching of different MIC/GND pin assignments • Variable attenuation/amplification of microphone paths Reference Headset Features: • HIB I simulates the microphone of a headset so that it is recognized as a headset by the telephone • Headphones are simulated with selectable load impedance (8, 16, 32 Ohm or 10 kOhm). • Button push simulation “Play/Pause”, “Volume Up/Down”, “Start Speech Recognition” according to ITU-T P.381
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Subject to change
CONNECTORS Front plate: HIB I = Reference Headset, DUT = Telephone: • 1x BNC for right headphone channel • 1x BNC for left headphone channel • 1x BNC for MIC1 (output simulation of main microphone) • 1x BNC for MIC2 (optional output simulation of a second microphone)
• 1x 4 pin 3.5 mm jack socket for stereo headsets with single microphone • 1x BNC for optional second headset microphone Rear plate: Connection from/to MFE VI.1 (and successor front ends): • 4x BNC (2x Out and 2x In) • 1x Micro USB (only for power supply with suitable plugs, min. 1 A at 5 V DC / no USB data communication) Connection to ACQUA PC (via cable CUD II): • 1x D-Sub 9-pin
SYSTEM REQUIREMENTS
STANDARD DELIVERY ITEMS
TECHNICAL DATA:
• ACQUA (Code 6810 etc.) Full-license or Compact (version 3.4 or later), including corresponding system components (cf. ACQUA data sheet)
HIB I (Code 6002) comprises the following components: • HIB I Headset Interface Box • CUD II (Code 6089) cable for direct connection to ACQUA PC • CJB II (Code 6090) Adapter 3.5 mm Jack 4-pin <> BNC (Connection Mobile Phone <> HIB I) • Manual (in preparation)
THD+N (f=20Hz-20kHz): To/From Phone (@0dBV): Mic1 / Mic2 < 0.0025 % Left /Right < 0.0025 % To/From Headset (@-16dBV): Mic1 / Mic2 < 0.0025 % Left / Right < 0.0025 % Crosstalk (f=1kHz): To/From Headset(@-16dBV): Mic1 to Left < -85 dB Mic1 to Right < -85 dB Left to Right < -85 dB Mic2 to Left < -85 dB Mic2 to Right < -85 dB To/From Phone(@0dBV): Mic1 to Left < -85 dB Mic1 to Right < -85 dB Left to Right < -85 dB Mic2 to Left < -85 dB Mic2 to Right < -85 dB Recommended Maximum Levels (AC): From/To MFE: 6dBV (2V) To/From Phone: 6dBV (2V) To/From Headset: -16dBV (160 mV) Power Source for Mic1/Mic2 @2.2k Ohm (To/From Headset): Configurable and stabilized supply voltage range 0.6 … 3.8 V (in 25 mV steps possible) Input / Output gains (From/To MFE): Configurable gains from +30 … -95 dB (in 0.5 dB steps) Input Impedances: To/From Phone: Left /Right : Off (>100k Ohm), 8 Ohm, 16 Ohm, 32 Ohm and 10k Ohm To/From Headset: Mic1 / Mic2 : > 100k Ohm From/To MFE: IN1 / IN2 : > 100k Ohm Output Impedances: To/From Phone: Mic1 / Mic2 : = 5k Ohm (Mic1 with simulated button press function for mobile devices) To/From Headset: Left / Right : < 1 Ohm From/To MFE: OUT1/OUT2: 50 Ohm Overall (all Inputs / Outputs) GND connection: < 0.05 Ohm Rechargeable battery: 1800 mAh capacity Power consumption: max. 1 W Dimensions (Width/Height/Depth): 147 x 35 x 78 mm Weight: 420 g
RELATED PRODUCTS • MFE VI.1 (Code 6462): ACQUA Measurement Front End with integrated mouth amplifier • HMS II.3-33 (Code 1230.1): HEAD Measurement System, Basic Version with Ear Canal Coupler, Pinna Type 3.3 & Artificial Mouth
CONFIGURATION EXAMPLES RF
Radio Tester
Simulates a headset Analog
USB USB
HIB I DUT (Mobile Phone)
MFE VI.1
DUT (Headset) Simulates a telephone HIB I
USB USB
MFE VI.1
represented by
Typical Frequency Response (all Inputs/Outputs)
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Subject to change
