Shure FP16A User Manual

Model FP16A Distribution Amplifier

User Guide

GENERAL DESCRIPTION

The FP16A is a 1-input, 6-output, compact, self-contained audio distribution amplifier for routing multiple audio signal feeds
without incurring loss, distortion, hum or noise. The intelligent design, reliable components and meticulous construction of
the FP16A make it the optimum choice for broadcast stations—AM, FM, or TV, studios or ENG vans—as well as recording
studios, duplicating houses, and telecommunications and production facilities.

FEATURES

•

Wide-range audio frequency response

• Up to 90 dB gain

• Low noise, hum and distortion

• Protected against damage from input overload and

shorted outputs; protected against RFI and
mechanically protected against incorrect battery
insertion

• Transformer-coupled XLR input connector is

switchable to low-impedance microphone or line
level

• Phantom power for condenser microphones

available at input

• Six isolated, transformer-coupled XLR outputs are

switchable to low-impedance balanced microphone
or 600-ohm balanced line level

• Link input and output jacks permit "ganging" of

FP16s for additional outputs, or adding external

equipment such as equalizers, compressors or
limiters

• Recessed input gain control with normal and

overload LED indicators

• Recessed individual output channel gain controls

• Powered by AC (120 or 240V-internally selectable)

or built-in battery pack

• Low battery drain provides more than 15 hours

operation under normal operating conditions

• Noiseless and automatic switchover to and from

battery power

• Rugged and durable construction

• Compact and lightweight for field use and

transportation

• Reliable operation over wide temperature and

humidity extremes

• Rack-mountable with accessory rack mount kit

©2004, Shure Incorporated

27A8725 (Rev. 3)

Printed in U.S.A.

SPECIFICATIONS

Frequency Response (ref 1 kHz)

30 to 20,000 Hz, ±2 dB

Voltage Gain (at 1 kHz)

INPUT OUTPUT

LINE MICROPHONE LINK

Mic 90 dB 40 dB 70 dB
Line 40 dB -10 dB 20 dB
Link 20 dB -30dB - -

Inputs

INPUT IMPEDANCE (at 1 kHz) INPUT CLIPPING

FOR USE WITH ACTUAL

Mic 150 Ω 1 kΩ -62 to -6 dBV*
Line less than 10 kΩ 66 kΩ -12 to + 44 dBV*
Link more than 5 kΩ 24 kΩ +8 dBV

*Dependent on input control setting

Outputs

INPUT IMPEDANCE (at 1 kHz) INPUT CLIPPING

FOR USE WITH ACTUAL

Mic 150 Ω 2 Ω -34 dBV
Line 600 Ω 185 Ω +16 dBV
Link 600 Ω or greater 100 Ω or less +16 dBV

Noise

Equivalent Input Noise: -129 dBV (low-impedance microphone,
150 Ohms, 300 to 20,000 Hz) into 600 ohm load at full gain

Equivalent Input Hum and Noise: -127 dBV (low-impedance micro­phone, 150 Ohms, 20 to 20,000 Hz) into 600 ohm load at full gain

Output Noise: -90 dBV maximum (output control full counterclockwise
[off]), -65 dBV maximum (output control full clockwise [on]) (input control
down, 300 to 20,000 Hz)

Output Hum and Noise: -75 dBV maximum (output control down), ­65 dBV max. (output control up, input control down, 20 to 20,000 Hz)

LEVEL AT 1kHz

LEVEL AT 1kHz

Distortion

0.4% THD, 30 to 20,000 Hz at +15 dBm output; 0.5% or less IM distor­tion at +15 dBm output

Common Mode Rejection

65 dB minimum with input of - 20 dBV at 100 Hz

Control Interaction

Less than 1 dB with any control combination

Overload and Shorting Protection

Shorting outputs, even for prolonged periods, willcause no damage; mi­crophone input will not be damaged by signals up to 3V

Phase

All outputs in phase with input. Pin 2 is “high” with respect to pin 3; pin
1 is ground. Tips of link input and output phone jacks are in phase with
pin 2 of XLR connectors.

Phantom Power

30 VDC nominal, 3.3k series resistance, automatically disabled with in­put switch in Line position

Operating Voltage

AC Operation: 120 or 240 VAC ± 10% (internally selectable), 50/60 Hz,

5.5W
DC Operation: 27 VDC nominal at 16 mA typical no- signal, 22 mA typ-

ical at 0 VU (+4 dBm) output; 21.5 VDC minimum; battery life approxi­mately 20 hours with alkaline batteries at +4 dBm output in continuous
use; three 9 volt batteries, type NEDA 1604A (Duracell MN1604 or
Eveready 522 recommended)

Temperature Range

Operating: -18° to 57°C (0° to 135°F)
Storage: -29° to 71°C (-20° to 160°F)

Dimensions

79.5 mm H x 310 mm W x 230 mm D
(3-1/8 in, x 12-7/32 in. x 9-1/16 in.)

Weight

Net: 2.75 kg (6 Ib 1 oz.)
Packaged: 3.15 kg (6 Ib 15 oz.)

Certifications

Listed by Underwriters Laboratories. Inc.; listed by Canadian Standards
Association as Certified

CONTROLS AND CONNECTORS

On⋅Off Switch: applies power to the FP16A circuitry
Power LED: Indicates unit is on.
Input Gain Screwdriver Control: adjusts input signal level.
Output 1-6 Screwdriver Control: adjusts individual output

channel signal levels.
Norm LED: indicates when internal signal level is approxi-

mately 25 dB below clipping.
Overload LED: indicates when internal signal level ap-

proaches clipping.
Three-Pin XLR 1-6 Output Connectors: provide for connec-

tion to either low-impedance microphone or line level inputs
of power amplifiers, mixers, or other signal processing
equipment.

Mic/Line 1-6 Slide Switches: select microphone or line level
output signal levels.

Phantom On-Off Slide Switch: applies 27 VDC (nominal)
phantom power to pins 2 and 3 of the input connector for
use with condenser microphones. IMPORTANT: Make cer-
tain any condenser microphone used is compatible with the
FP16A phantom circuit, and that the FP16A input Mic/Line
switch is in the Mic position. Do not turn the Phantom switch

on when using unbalanced low-impedance microphones;
objectionable hum will result. Turn the Phantom switch off
when phantom power is not required.

Three-Socket XLR Input connector: provides for connection
to microphone or line level input signal sources.

Input Mic/Line Slide Switch: selects microphone or line-lev­el input signals.

Link In, Out Phone Jacks: provide for connecting more dis­tribution amplifiers for additional outputs, or adding external
equipment such as equalizers, compressors, or limiters.
When connecting two or more FP16As together for addition­al outputs, connect the Link Out jack of the "master" unit to
the Link In jacks of the others. Any number of FP16As can
be tied together in this way. The Link In jack is input-only,
and has switching contacts to disconnect the input signal
amplifier from the output channel volume controls.

Connect an equalizer, limiter or compressor to the FP16A by
connecting the FP16A Link Out jack to the external unit's in­put, and the external unit's output to the FP16A Link In jack.

Signals at the Link jacks are typically 10 dB below line level.
The Link In input impedance is greater than 20 kΩ and may
be considered a bridging impedance.

2

INSTALLATION AND OPERATION

Battery Operation

In addition to 120 or 240 VAC operation, the FP16A can be
operated from an internal battery pack. Current drain is typ­ically 22 mA at +4 dBm output level. Battery operation is rec­ommended for remote, on-location operation, and as an
emergency backup source in case of AC power failure.

Access to the battery compartment is through the bottom of
the chassis. Three 9 volt transistor radio batteries power the
FP16A at full rated output. Use alkaline batteries for maxi­mum life. Duracell MN1604 or Eveready 522 are recom­mended. Battery life is approximately 20 hours at +4 dBm
continuous use. Note that phantom power loading will in­crease battery drain.

With batteries in the battery compartment, the FP16A will
automatically and silently switch to battery operation should
the AC voltage fall below a suitable level.

Connections

Connect the signal source to the three-socket XLR Input
connector and set the input Mic/Line switch for the proper
level. Connect the three-pin XLR 1-6 Output connectors to
low-impedance microphone or line level inputs of power am­plifiers, mixers, etc. Set each Mic/Line switch for the appro­priate signal level.

Connect additional distribution amplifiers or add external
equipment using the FP16A Link jacks (see Controls and
Connectors). A common ground connection can be estab­lished using the rear-panel Ground binding post.

Connect the line cord to a 120 VAC ±10%, 50/60 Hz source
if the FP16A is to be ac-operated. If 240 volt AC operation
is desired, refer to the Service section.

Adjustments

Turn the On-Off switch to the On position (Power LED will
light). Turn the Phantom switch on if a non-battery-operated
condenser microphone is to be used with the FP16A.

With an input signal applied, adjust the Input gain control so
that the Norm LED flickers during normal speech or music
(the Overload LED will flicker as the signal level approaches
clipping). Adjust the Output 1-6 controls to provide an ade­quate signal feed to the following equipment.

Telephone Interconnection

When using the FP16A connected directly to a telephone
line, check to see whether the telephone company requires
an interface coupler between the FP16A and the telephone
line. If a coupler is required, make certain the coupler select­ed and the wiring arrangement are in compliance with local
telephone company regulations.

When direct connection to a telephone line is not possible,
acoustic coupling to a telephone handset may be used. A
Shure Model 50AC Telephone Acoustic Coupler can be
connected to the 600 ohm line output of the FP16A and at­tached to most telephone handsets.

Telephone Line Surge Protection

When using the FP16A connected directly to a telephone
line subject to lightning-induced voltage surges, the follow­ing part (commercially available) can be installed across the
LINE OUT terminals to provide additional protection for out­put circuit components: Metal Oxide Varistor, General Elec­tric Co., Type No. V22ZA1.

ACCESSORIES

The Model A16R Rack Panel Kit consists of a 19 in, x 3-1/2
in. (483 mm x 89 mm) precut rack panel and necessary
hardware for rackmounting the FP16A with its cover in place

SERVICE

Caution: These servicing instructions are for use by quali­fied personnel only. To avoid electric shock, do not perform
any servicing other than that contained in the Operating In­structions unless you are qualified to do so. Refer all servic­ing to qualified service personnel.

The FP16A can be disassembled as follows. Remove two
screws fastening each end cap. Remove four screws secur­ing the cover assembly to the chassis. Carefully lift the cover
assembly up and away from the chassis, taking care not to
snag any wire leads or components.

240 VAC Operation

To change the FP16A operating voltage from 120 VAC to
240 VAC, follow these steps.

and end caps removed in a standard 19" (483 mm) rack
panel.

1. Locate the Power board.

2. Remove the jumper plug from connector J205 (marked
120V), and carefully insert it in connector J206 (marked
240V), making sure all six pins are properly engaged.

3. lnsert the T50mA/250V fuse (packaged with the FP16A) in the
fuseholder marked F202.

4. Replace the AC line cord (if necessary) with one designed for
the 240 volt source. If the FP16A is to be used outside the
U.S. and Canada, local regulations may require replacing the
line cord with one having wire insulation colors as follows:

“live” or “hot” Neutral Earth or Ground

U.S., Canada Black White Green

Europe Brown Blue Green/Yellow

5. Mark the FP16A rear panel with the new operating voltage.

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REPLACEMENT PARTS LIST

REFERENCE DESIGNATION DESCRIPTION SHURE PART (COMMERCIAL ALTERNATIVE)

C101 Capacitor, Electrolytic, 47 µ , 35V Shure 60101FT (Sprague 503D476F035ND)

C104, C107, C130 Capacitor, Electrolytic, 22 µF, 35V Shure 60104FT (Sprague 502D226G050CE1C)

C105, C108, C111, C114, C117,
C120, C123

C110, C113, C116, C119, C122,
C125, C127, C133

C131, C134 Capacitor, Electrolytic, 470 µF, 35V Shure 60108FT (Sprague 503D477M035PE)

C202 Capacitor, Electrolytic, 330 µF, 63V Shure 60111FT (Sprague 503D337F063QG)

C204, C205 Capacitor, Electrolytic, 10 µF, 35V Shure 60112FT (Sprague 503D106F035LA)

D101-D108 Diode, Computer, 75V Shure 86A415 (TI/GE 1N4148)

D201-D204, D206-D207 Silicon Rectifier, 100V, 1/2A Shure 60201FT (Motorola 1N4002)

D205 Zener Diode, 9V, 112W Shure 60202FT (Motorola1N5239)

D601 Light-Emitting Diode, Green Shure 60204FT (Rohm SLR34MG3)

D701 Light-Emitting Diode, Yellow Shure 60205FT (Rohm SLR34YY3)

D702 Light-Emitting Diode, Red Shure 60206FT (Rohm SLR340R3)

F201 Fuse, Slow-Blow, 3AG, 100 mA, 250V Shure 60207FT (Littelfuse 313.010)

F202 Fuse, Time Delay, 5 mm x 20 mm, 50 mA, 250V Shure 60208FT (Littelfuse 218.050)

J401 Connector, 8-socket, XLR, PCB-mount Shure 60216FT (Cannon XLB-3-31PCV)

J402-J407 Connector, 3-pin, XLR, PCB-mount Shure 60217FT (Cannon XLB-3-32PCV)

J501-J502 Connector, PhoneJack, 2-conductor, Single Closed Circuit Shure 60218FT

L401-L414, L501-L502 Ferrite Bead Ring

Q101, 0103, Q105, Q107, 0109,
Q111, Q113-Q115, 0202-Q203

Q102, Q104, 0106, Q108,
Q110, Q112

Q201 Transistor, NPN Shure 60203FT (TI TIP30A)

R162 Potentiometer, Reverse Audio Taper, 100k Shure 60310FT

R163-R168 Potentiometer, Audio Taper, 50k Shure 60311FT

S1 Switch, Slide, DPDT (Power) Shure 61401FA

S301, S303-S308 Switch, Slide, 4PDT (Mic/Line) Shure 60402FT (Alco MSS4200RG)

5302 Switch, Slide, 4PDT (Phantom) Shure 60403FT (Alco MSS4200R)

T101 Transformer, Input Shure 60501FT

T102-T107 Transformer, Output Shure 60502FT

T201 Transformer, Power Shure 61501FA

U101 Integrated Circuit, Op Amp (selected for noise figure) Shure 86A808A (Raytheon RC4156DB)

U102-U103 Integrated Circuit, Op Amp Shure 86A808A (Raytheon RC4156DB)

U104 Integrated Circuit, Quad Comp Shure 60604FT (Raytheon LM339)

W13 Line Cord, AC Shure 60226FT

Capacitor, Electrolytic, 4.7 µF, 35V Shure 60105FT (Panasonic ECE-A35Z4R7)

Capacitor, Electrolytic, 100 µF, 35V Shure 60107FT (Sprague 503D107F050PD

Transistor, NPN Shure 60601FT (Rohm T1S92)

Transistor, PNP Shure 60602FT (Rohm TIS93)

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