HEAD acoustics GmbH MFE III.1 (Code 6201) MFE III.2 (Code 6202)

HEAD acoustics GmbH DATA SHEET
Ebertstraße 30a
D-52134 Herzogenrath
Tel: +49 (0)2407-577-0
Fax: +49 (0)2407-577-99
E-mail: telecom@head-acoustics.de
WEB: www.head-acoustics.de
DESCRIPTION
MFE III includes 2 input channels and 2
output channels for both balanced and
unbalanced operation. It is possible to
switch between input and output. All channels
can be independently amplified.
For connection of an artificial ear or mouth
(both of which are incorporated in the
Artificial Head Measuring System HMS
II.3) a microphone preamplifier, a mouth
amplifier and an equalizer for equalization
of mouth signals are incorporated.
The equalizer provides two equalization
modes for transfer function compensation
for the artificial mouth. Equalization can
be adjusted to the individual requirements
of the client.
10.08 D6201e3 Subject to change
Telephone terminal devices are connected
at terminal I/O. Supply voltages are
provided by the international feeding
bridge A. A broad range of adjustment is
available for voltage, inductance, capacitance
and interior impedance.
The line amplifier allows amplification of
test signals.
Simulation of actual transmission paths is
achieved via transmission lines of various
dimensions including a range of line terminations.
A range of line simulations is available
(e.g. Germany, Switzerland, North
America ...).
MFE III.1 (Code 6201)
MFE III.2 (Code 6202)
Telecom Measurement Frontend
Frontend for measurement data capture of
analog telephone equipment with ACQUA
Overview
The Frontends MFE II/III/IV/V provide the
connecting link between measurement
data capture (via the Artificial Head Measuring
System HMS II.3) and digital analysis
with the ADVANCED COMMUNICATION QUAL-
ITY ANALYSIS System ACQUA.
Via the Frontends, ACQUA is able to
automatically complete standard measurements
(ITU-T/ETSI ...), measurements
to HEAD acoustics standards, and also
user-defined measurements and measurement
sequences. Configuration of the
Frontends for data capture is fully computer-supported
in ACQUA.
MFE III finds application in dual-channel
measurement of analog telephone equipment
in the sending and receiving direction,
and also duplex operation testing.
MFE III incorporates the electronics for
operation of analog telephone terminal
devices and the measurement of such
devices for a range of transmission paths.
MFE III.1: Version for Europe
MFE III.2: Version for North America
Simulation of a terminal device at the telephone
end is achieved via a holding circuit
and an additional signal line termination
(e.g. appropriate for testing metering
devices).

Advanced
Communication
Quality
Analysis
HMS II.3
Artificial Head
Measur ement
System
COMPONENTS
V.24
dig. out
AES/EBU
dig. in
• Dual-channel input module and
dual-channel output module -
impedance:
- balanced: 600 Ohm, ZR (complex
impedance to FTZ 1TR2), (as
option 900 Ohm - US version)
- unbalanced: 100 kOhm (input),
50 Ohm ( output)
• 4 Amplifier modules for the 2 input
and output channels
• Microphone preamplifier
(artificial ear)
• Power amplifier for the artificial
mouth
• Equalizer with 2 selectable
equalizations for the mouth signal
• Digital/analog and analog/digital
converter
- data formats: AES/EBU, IEC
- sampling rates: 32 kHz, 44.1 kHz,
48 kHz
• Processor control for the
configuration from ACQUA
10.08 D6201e3 Subject to change
Measurement Frontend
with Line Simulator
A
A
D
D
D
D
A
A
Bridge
Line
terminations
V=
-40 dB
...+30 dB
Feeding
bridge A
• Terminal I/O for connection to
telephone terminal equipment
• International feeding bridge A
(connection for external feeding
resistor or feeding bridge)
• Line amplifier (external output)
• Line simulation Germany (as option
Switzerland, USA) (input/output for
external use of the internal line simulation
or for an external line simulation)
• Line terminations (input/output for
external use of the internal
termination or for an external
termination)
• Holding circuit (input/output for
external use of the internal
termination or for an external
termination)
• Line termination at the telephone end
(input/output for external use of the
internal termination or for an
external termination)
Line
~
simulations
+
-
+
-
ZR balanced
(900 W - USA)
600 W bal.
100k W unbal.
ZR balanced
(900 W - USA)
600 W bal.
600 W bal.
ZR balanced
(900 W - USA)
50 W unbal.
600 W bal.
ZR balanced
(900 W - USA)
Line Amplifier
a
b
art. ear
analog
in
analog
out
art. mouth

STANDARD DELIVERY ITEMS
MFE III (Code 6201)
comprises the following components:
• MFH III (Code 6280):
Housing for MFE III
MPA I.2 (Code 6195):
Microphone-preamplifier for MFE II/III
with LEMO connector
alternatively:
MPA I.1 (Code 6185):
Microphone-preamplifier for MFE II/III
with B&K socket
MAM I.1 (Code 6186):
Mouth amplifier for MFE II/III
MEQ II (Code 6194):
MFE II/III equalizer
MBI I.1 (Code 6188):
Balanced/unbalanced input for MFE II/III
(Standard delivery with MFE III.1)
MBO I.1 (Code 6189):
Balanced/unbalanced output for MFE II/
III (Standard delivery with MFE III.1)
AIO II (Code 6193):
Amplifier for input/output channels for
MFE II/III (4´)
ADU I.1 (Code 6183):
A/D unit for MFE I/II/III
DAU I.1 (Code 6182):
D/A unit for MFE I/II/III
CPU (Code 6184):
CPU for MFE I/II/III/IV/V
MLA I.1 (Code 6286):
Line amplifier
Generator
and Analyzer
Diffuse
Field
RS232
AES / EBU
(digital)
IEEE 488
or RS232
10.08 D6201e3 Subject to change
Analog
Frontend
including internal
- feeding bridge,
- line simulation,
- line termination
MLT III (Code 6297):
Line terminations (international)
MFA III (Code 6296):
International feeding bridge A
MLS I.1 (Code 6282):
Line simulation German standard
(Standard delivery with MFE III.1)
MTI II.1 (Code 6295):
Terminal I/O
MHC I.1 (Code 6284):
Holding circuit German standard
MMT (Code 6287):
Termination impedances to German standard
CLD II.1 (Code 6071):
Cable RS 232,
D-Sub 9 pin ↔ D-Sub 25 pin, 3 m
CCC I.1 (Code 4174):
Cable cinch ↔ cinch, 1m (2 x)
PCC I.9x (Code 997x):
Mains cable (to local specification)
MFD I (Code 6059):
User’s manual MFE I/II/III/IV/V
CBA I (Code 6077):
Cable adaptor BNC ↔ BNC with
integrated capacitor (2 x)
OPTIONS
LSS I.1 (Code 6289):
Line simulation Switzerland standard
MLU I (Code 6293):
Line simulation USA standard
(Standard delivery with MFE III.2)
MFE III.x
(analog)
External Devices
(as option):
ext. feeding bridge
ext. line simulation
ext. termination
Background
Noise
HAE-BGN
(a/b) TAE
Mic
LS
MBI II.1 (Code 6173):
Balanced/unbalanced input
(Standard delivery with MFE III.2)
MBO II.1 (Code 6174):
Balanced/unbalanced output
(Standard delivery with MFE III.2)
CTD II (Code 6078):
Cable Telecom plug ↔ D-Sub 9-pol.
(for GSM)
alternatively:
CTD III (Code 6081):
Cable Telecom plug ↔ D-Sub 9-pol.
(for CDMA)
ACCESSORIES
HMS II.3 (Code 1230):
Artificial HEAD Measurement System incl.
ear simulation and artificial mouth
ACOPT 22 (Code 6847):
Option ES 203 021 - Basic Attachment
Requirements for Analog Terminals
HMS II.3 &
HHP III
Ear
Simulator
Mouth
Simulator
Test Head

Technical Data
D/A Converter
Quantization: 20 bits
Sampling rate: 32 kHz, 44.1 kHz, 48 kHz
Inputs: AES/EBU, IEC
Oversampling: 8-fold
Deemphasis: 15 µs/50 µs (automatic)
Nom. output voltage: 1 V
Max. output voltage: 2 V
S/N ratio: > 100 dB (at full modulation)
Dynamic range: > 96 dB
A/D Converter
Quantization: 18 bits
Sampling rate: 32 kHz, 44.1 kHz, 48 kHz
Outputs: AES/EBU, IEC
Oversampling: 64-fold
Preemphasis: 15 µs/50 µs (switchable)
Nom. input voltage: 1 V
Max. input voltage: 2 V
S/N ratio: > 93 dB (at full modulation)
Dynamic range: > 93 dB
Analog Inputs and Outputs
Sockets: BNC, unbalanced; banana-type,
balanced
Amplification: -40 dB - +30 dB, adjustable in
steps of 1 dB
Max. deviation of amplification: -30 dB - +30 dB: 0.03 dB
Inputs
Impedance: 100 kΩ unbalanced, 600 Ω
balanced, ZR balanced
(900 Ω balanced - version for
North America)
Transmission range: 20 Hz - 20 kHz, ± 0.1dB
Nom. input voltage: 1 V
S/N ratio: > 90 dB (at full modulation)
Dynamic range: > 90 dB
Cross-talk attenuation: > 80 dB (1 kHz at nom. level)
Distortion factor: < 0.01 % (1 kHz at nom. level)
Outputs
Impedance: 50 Ω unbalanced, 600 Ω
balanced, ZR balanced
(900 Ω balanced - version for
North America)
Transmission range: 20 Hz - 20 kHz (± 0.1 dB)
S/N ratio: > 100 dB (at full modulation)
Dynamic range: > 90 dB
Cross-talk attenuation: > 80 dB (1 kHz at nom. level)
Distortion factor: < 0.01 % (1 kHz at nom. level)
Microphone input
Transmission range: 20 Hz - 10 kHz (± 0.1dB)
Calibration: using conventional measurement
microphones to 0 dB Pa = 0 dBV at
position 0 dB
Level adjustment: 50 dB to 0 dB, adjustable in steps
of 10 dB ± 0.05 dB
High-pass: activatable, fg = 22.4 Hz
S/N ratio: > 80 dB (at full modulation)
Dynamic range: > 80 dB
Distortion factor: < 0.01 % (1 kHz at nom. level)
Power amplifier for artificial mouth
Max. output power 10 W at 4 Ω
Transmission range: 20 Hz - 20 kHz
Dynamic range: > 80 dB
Distortion factor: < 0.2 %,
Equalization 2 equalization modes selectable
10.08 D6201e3 Subject to change
Line simulation
(Europe) to DTB-Telekom Specification FTZ 1TR2
Main station line simulation
0.4 mm dia.: 0.4 km, 1 km, 2 km, 3 km, 4 km
0.6 mm dia. 3 km, 6 km
Extension line simulation
Line simulation
(Northern America) to specification TIA/EIA 470B
Lengths of lines: 3 kft, 6 kft, 9 kft, 12 kft, 15 kft
external line simulation can be connected
Line terminations
Impedance 600 Ω, 100 Ω, ZR (ZV24b/ZEURO),
ZV24/ZEURO_a, ZV24/ZEURO_c,
1500 Ω
additionally: ZEURO_b / (TBR 21), 900 Ω
as option, possibility of 6 further impedances
external impedance can be connected
International feeding bridge A
C = 0µF - 104µ ΔC = 2µF
Feeding resistor unbalanced 0 - 80 kΩ ΔR = 10 Ω
Supply voltage 20 V ... 65 V ΔU = 1 V
Feeding current max. 100 mA
Feeding resistor balanced 100 Ω - 850 Ω per feeding branch
ΔR = 50 Ω
Feeding inductivity 1 H, 2 H, 5 H or 10 H per path
Holding circuit:
Resistance 0 Ω, 200 Ω, 300 Ω or external
external holding circuit can be connected
Mains operation: 90 V-120 V / 200 V - 265 V
47-63 Hz
Max. power consumption: 200 W
Environmental conditions
Operating temperature range: 0°C - 40°C, 32°F - 104°F
In-store temperature range: -40°C - 80°C, -40°F - 176°F
Measurements at room
temperature are recommended
Housing
Overall dimensions (W×H×D) 530 mm × 310 mm × 430 mm
Weight: 26 kg
represented by