Hall Research HR-101-S User Manual

© Copyright 2013. Hall Research, Inc. All rights reserved.

User’s Manual

Model HR-101-S

Compact XLR Microphone Amplifier

With Stereo Line Level Mixer, Phantom Power,

Analog and Digital Outputs

Model HR-101

Mic and Line-Level Fiber Optic Audio Extender Kit

UMA1203 Rev n/c

1163 Warner Ave Tustin, CA 92780, Ph: [phone], Fax [phone]

MIC Preamp/Audio over Single Fiber

2

Table of Contents

1.0 General ............................................................................................... 3

2.0 Features .............................................................................................. 3

3.0 HR-101-S Description ....................................................................... 3

4.0 HR-101-R Description ...................................................................... 5

5.0 Troubleshooting ................................................................................. 6

6.0 Specifications ...................................................................................... 7

Hall Research and its logo
trademarks mentioned in this manual are acknowledged as the property of the
trademark owners.

FCC RADIO FREQUENCY INTERFERENCE STATEMENT

This equipment generates, uses, and can radiate radio frequency energy and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been
designed to comply with the limits for a Class A computing device in accordance
with the specifications in Subpart B of Part 15 of FCC rules, which are intended
to provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at their own
expense will be required to take whatever measures may be necessary to correct
the interference.

Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

TRADEMARKS USED IN THIS MANUAL

are trademarks of Hall Research. Any other

Model HR-101

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1.0 General

The HR-101 a professional quality Fiber-Optic audio extender kit
comprised of two units: a sender (HR-101-S) and a receiver (HR-101-R).

The Sender can be used as a stand-alone XLR microphone pre-amplifier
with stereo line level mixer, phantom power, and both analog and digital
(SPDIF) outputs. The Sender also provides a single ST fiber-optic
connector that can extend the audio to a compatible receiver upto 3,280 ft
(1,000 meters) away.

2.0 Features

• Professional grade low-noise microphone preamplifier

• Adjustable gain for Mic input

• Switchable Phantom power for Mic input

• Stereo line-level audio input (mixes with microphone signal)

• Local stereo analog and SPDIF digital audio outputs

• Front panel VU meter to indicate volume level

• Extends Audio on just one multimode fiber optic cable to 3,280 ft

• Compact, Rugged, Reliable, and Economical

• Made in USA

3.0 HR-101-S Description

The HR-101-S is a compact and professional grade microphone amplifier
with stereo line-level mix that can be used as a stand-alone device, or
paired with the HR-101-R to extend audio over long distances on fiber
optic cables. The HR-101-S provides a balanced mic input on an XLR
connector as well as a stereo line level input on 3.5mm mini-stereo jack.

The unit has an adjustable-gain low noise mic preamp with a gain range of
+34 to +54 db (or x50 to x500) and provides indication of volume level on
digital VU meter on its front panel (to prevent saturation and clipping due
to too much gain). The unit accommodates a wide range of microphone
types. Phantom power can be inserted by means of a front panel switch

MIC Preamp/Audio over Single Fiber

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The stereo line input is on a standard 3.5mm (1/8 inch) connector which
gets mixed with the amplified microphone signal.

In a typical application a presenter can hookup the audio from their PC to
the line input and plug the mic to the XLR. The unit will mix the speakers
voice with the PC audio.

The HR-101-S has both stereo analog (on 3.5mm) and SPDIF digital (on
RCA) outputs as well as a fiber-optic ST connector for driving long
cables to 3,280 ft. to compatible receiver.

HR-101-S Functional Block Diagram

HR-101-S Front and Rear views

The HR-101 can extend an audio over a single multi-mode fiber optic
cable spanning distances of over 1000m (3280ft). For lengths of upto 500

Model HR-101

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meters OM2 or OM3 cables are recommended, and for distances of over
500 meters OM3 cable is recommended.

Hall Research can provide pre-terminated fiber optic cables at various
lengths up to 1,000 meters at competitive prices as shown below.

OM2 Cables: CST-OM2-length (length = 100, 300, or 500 meters)
OM3 Cables: CST-OM3-length (length = 700, 900, or 1,000 meters)

4.0 HR-101-R Description

The Model HR-101-R Receiver has an ST fiber optic input connector to
receive audio from the sender. It provides a stereo line level output on

3.5mm mini-stereo jack and a SPDIF digital audio output on a RCA
connector.

MIC Preamp/Audio over Single Fiber

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5.0 Troubleshooting

Make sure that all of the connections to the units are solid, and check the
state of the PWR LED’s on the front. Do not open or try to repair the unit
yourself. There is no customer repairable item in the device and you will
void your warranty.

Contact HR Support at 714-641-6607 or via email or web. If you need to
ship your unit for repair, make sure to get a Return Material Authorization
(RMA) number first.

When returning a unit for repair, make sure to include a detailed
description of the setup and failure.

Model HR-101

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6.0 Specifications

Audio Inputs 1x 3.5mm analog line level stereo,

1x XLR microphone

Audio Outputs 1x 3.5mm stereo analog , 1x RCA SPDIF Digital
Mic In Impedance 6.8 KΩ

Mic Phantom Power 15vDC (note that most mics rated for 48v accept

range of 12~48 vDC, with some 9~52 vDC)

Mic Amplifier Noise 1.3nV/√Hz RFI at 1KHz

Mic CMR 100 dB min

Audio Bandwidth 3 Hz to 30 KHz

Optical Wavelength 840 nm GaAIAs LED

Optical Cable Simplex (only 1 fiber) Multi-Mode. OM2 or OM3

Temperature Operating: 32 to 122°F (0 to 50°C);

Storage: –40 to +185°F (–40 to +85°C)

Enclosure Aluminum and Steel

MTBF 90,000 hours (calculated estimate)

Power 5V DC, 2.6A (actual consumption less than 0.25A)

Size Sender: 1.64’’H x 4.18’’W x 5.08’’D

(4.2x10.6x12.9 cm)
Receiver: 1.26’’H x 2.75’’W x 3.77’’D
(3.2x7.0x9.6 cm)

Weight Sender: 0.65 pounds (0.295 kg)

Receiver: 0.34 pounds (0.153 kg)

© Copyright 2013. Hall Research, Inc.

All rights reserved.

1163 Warner Ave., Tustin, CA 92780

Ph: [phone], Fax: [phone]