Rane MS 1B Manual de usuario

Data Sheet-1

MS 1b

MICROPHONE STAGE

General Description

e Rane MS 1b Mic Stage preampliﬁer

provides the answer when you need just

one microphone input in an otherwise

line-level world. Give us a call to go from

either a dynamic, condenser or electret

microphone to a line-level input with a

minimum of noise, distortion, cost and

hassle.

e MS 1b provides 48 V switchable

Phantom Power with indicator LED,

continuous rotary Gain trim between 18

dB and 66 dB, Signal/Overload LED, and

XLR balanced Input & Output connec-

tors. A Polarity switch and high-current

cross-coupled output line driver round out

the features.

e MS 1b utilizes one of the ﬁnest

ultra low noise ampliﬁer designs available.

Featuring a true diﬀerential input with

high common-mode rejection, use of the

MS 1b guarantees performance usually

found only in mixing consoles costing

thousands of times as much. Of course,

for all of that extra money you receive a

proportional increase in KPSI (knobs per

square inch).

Features

• 120 dB dynamic range

• Gain Control

• Signal / Overload Indicator

• Polarity Switch

• Switchable 48 V Phantom Power

• True dierential Input

• Cross-coupled line driver

• UL/CSA/CE and 100/120/230 VAC remote power supply

DATA SHEET / MANUAL

4.225"

0.15"

2.5"

5.1"

5.8"

.7"

0.775"

0.35"

1.636"

MIC

STAGE

MAXMIN

MS 1b

GAIN SIG/OL 48V PHANTOM

POWER

MIC INLINE OUT

CLASS 2 EQUIPMENT

NORMAL

POLARITY

INVERT

MADE IN U.S.A.

RANE CORP.

ACN 001 345 482

220mA

POWER

MS 1b

Data Sheet-2

MS 1b

MICROPHONE STAGE

Features and Speciﬁcations

Parameter Specication Limit Units Conditions/Comments

Input Impedance 10k 1% Ω Balanced 5k + 5k

Gain Range 18 to 66 typ. dB

Phantom Power +48 4% V 10 mA max.

..........Impedance 6.81k 1% Ω Each leg

..........Load Regulation 0.1 typ. % 0 to 14 mA

..........RMS CM Noise .003 typ. % % of Vout (10 Hz to 10 kHz)

Max. Input Level +10 / -32 min. dBu Gain 18 / 60, balanced output

Equivalent Input Noise -128 typ. dBu 20 kHz BW, Rs=150 Ω, Gain = 60 dB

Signal to Noise Ratio 96 typ. dB 20 kHz BW, Rs=150 Ω, Gain = 18 dB, re 4 dBu

Dynamic Range 120 / 95 typ. dB Gain 18 / 66

CMRR 80 typ. dB Rs=150 Ω, 120 Hz, Gain = 60 dB

Frequency Response

..........Gain 60 dB 45 to 200k typ. Hz +0, -3dB

..........Gain 18 dB 30 to 200k typ. Hz +0, -3db

THD+Noise (gain 60 dB) .007 (Output=+20 dBu) typ. % 55 Hz to 20 kHz, 20 kHz BW, Rl=10 kΩ

THD+Noise (gain 18 dB) .001 (Output=+20 dBu) typ. % 50 Hz to 20 kHz, 20 kHz BW, Rl=10 kΩ

Line Driver Active Cross-coupled Gain 5.2 / 6 dB typ. unbalanced / balanced

Max. Output Level +22 / +27 min. dBu Unbalanced / Balanced, 2 kΩ load

Output Impedance 50 1% Ω Each Leg

Signal Indicator 2 / 8 typ. dBu Unbalanced / Balanced output, Green LED

Overload Indicator 14 / 20 typ. dBu Unbalanced / Balanced output, Amber LED

Output Cable Length 1000 feet / 300 meters typ. Belden 8451 or equivalent

Unit: Agency Listing

..........120 VAC model Class 2 Equipment National Electrical Code

UL & CSA Exempt Class 2 equipment

..........230 VAC model CE-EMC EMC directive 89/336/EEC

CE-Safety Exempt per Art. 1, LVD 73/23/EEC

Power Supply: Agency Listing Class 2 Equipment

..........120 VAC model UL File no. E88261

CSA File no. LR58948

..........230 VAC model CE-EMC EMC directive 89/336/EEC

CE-Safety LV directive 73/23/EEC

..........100 VAC model Built to JIS Japan only

Power Supply Input 18 VAC w/center tap 10% Vrms Rane RS 1 supplied

Max Current Consumption 220 mA

Unit Size 1.65"H x 5.1"W x 4.25"D (4.2 cm x 13 cm x 10.8 cm)

..........Weight 1 lb (0.45 kg)

Shipping Size 3.6"H x 11.75"W x 7.2"D (9.5 cm x 30 cm x 18 cm)

..........Weight 4 lb (1.8 kg)

Data Sheet-3

MS 1b

MICROPHONE STAGE

Block Diagram

Application Information

Uses and applications for the MS 1b should be obvious. But then

again, it’s obvious to us our taxes are too high and nothing is be-

ing done about that. With this in mind, perhaps a few words on

using the MS 1b might not be wasted.

BALANCED USE

e MS 1b provides a true cross-coupled balanced output. is

is equivalent to an electronic simulation of a transformer output.

Rane follows the AES standard of pin 2 = hot.

When running a long cable back to the mixer, run a line-

level balanced line rather than a mic-level line. e compact MS

1b can mount closer to the microphone, provide a local volume

control (or not, just pull the knob oﬀ), while the stronger signal

minimizes RF and hum irritations.

UNBALANCED USE

Balanced use is recommended to minimize noise. Unbalanced

lines are usually quiet under 10 feet (3 meters), but longer runs

will introduce the hum and interference you are trying to avoid.

When you must drive an unbalanced device with the MS 1b's

balanced output, keep the cable short, and connect pin 2 to the

“+” or “hot” lead, and tie pin 3 and ground together at the shield.

MIXING

e MS 1b is designed to ﬁll the need for adding a microphone

channel to line-level mixers, such as the Rane SM 26B or SM 82.

Many installations using either of these products invariably wind

up with one unused input that would do the job perfectly if only

it could operate at mic-level. In rides the MS 1b to the rescue.

DIGITAL RECORDING AND SAMPLING

Another handy use for the MS 1b is in recording applications.

Many popular products do not have a high enough quality mic

preamp to suit the resolution of the digital processing electron-

ics. Such irony. Using the ultra low noise MS 1b to bring the

mic inputs up to extremely high quality line-level is an easy and

aﬀordable solution for this dilemma. No garbage in; no garbage

out. Clippity-clop; clippity-clop.

MICROPHONE TYPES

e available gain and large input range of the MS 1b allows

the use of virtually any type of microphone. True 48V phantom

power guarantees the MS 1b works with every microphone. e

better the mic, the better the MS 1b sounds.

Ah, the sound of the thundering hoofs is deafening.

SIGNAL / OVERLOAD

MIC

INPUT

PHANTOM

POWER

+48 V

12-60 dB

GAIN

LEVEL

LINE

FILTER

RFI OUT

INVERT

+6 dB

Data Sheet-4

MS 1b

MICROPHONE STAGE

All features & speciﬁcations subject to change without notice. DOC 104514

©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com

Chassis Grounding Note

Units with outboard power supplies do not ground the chassis

through the line cord. Make sure that these units are grounded

either to another chassis which is earth grounded, or directly to

the grounding screw on an AC outlet cover by means of a wire

connected to a screw on the chassis with a star washer to guaran-

tee proper contact.

Please refer to RaneNote, “Sound System Interconnection”

(supplied with your manual and available at www.rane.com) for

further information on system grounding.

Architectural Speciﬁcations

e microphone preampliﬁer shall be a single channel stand-

alone unit with remote power supply. e power supply shall be

U.L. listed, C.S.A. certiﬁed, and CE certiﬁed. e input and

output shall be ﬁtted with XLR connectors. A polarity invert-

ing switch shall be included. Phantom power shall be provided

in compliance with IEC 60268-15 and be controlled by a slide

switch with an LED indicator. A gain control shall be provided

with 18-66 dB adjustment range. Power, system signal and

overload indicators shall be provided. High current cross-coupled

active output line driver shall be standard, as well as input RFI

ﬁlter protection.

e unit shall be a Rane MS 1b Microphone Stage.

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