Decade Transmitters FM-800 FM-800 and FM-850 User Manual Instruction manual

Decade Transmitters Inc FM-800 and FM-850 Instruction manual

Instruction manual

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Document ID251730
Application IDrpxZkcx6K2SLLqHN71cOCg==
Document DescriptionInstruction manual
Short Term ConfidentialNo
Permanent ConfidentialNo
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Document TypeUser Manual
Display FormatMicrosoft Word - pdf
Filesize25.89kB (323585 bits)
Date Submitted2002-06-21 00:00:00
Date Available2002-10-04 00:00:00
Creation Date2002-06-21 15:34:28
Producing SoftwareAcrobat Distiller 4.0 for Windows
Document Lastmod2002-06-21 15:34:31
Document TitleInstruction manual

HI-FI MONO/ STEREO FM TRANSMITTERS
FM-800 / FM-850
INSTRUCTION MANUAL
In conformity with FCC part 73 regulations
(Verification only)
DECADE
9902-800/850
TABLE OF CONTENT
PAGE
SECTION 1: GENERAL INFORMATIONS .........................................
A) Introduction ...............................................................
B) Description ................................................................
C) Warranty...................................................................
D) Warning ....................................................................
E) Technical specifications.............................................
SECTION 2: FRONT & BACK PANEL DIAGRAMS............................
A) Front & back panel diagrams.....................................
B) Front & back panel description ..................................
SECTION 3: INSTALLATION ............................................................
A) Introduction ...............................................................
B) Receiving inspection..................................................
C) Connections..............................................................
D) Location of the transmitter and antenna.....................
SECTION 4: OPERATION.................................................................
A) Controls and indicators..............................................
B) Input and output connectors......................................
C) Optimal input level ....................................................
SECTION 5: MAINTENANCE AND PROGRAMMATION ....................
A) Maintenance..............................................................
B) Frequency programmation ........................................
C) RF power level programmation ..................................
SECTION 6: APPLICATIONS............................................................
10
ANNEXES
11
! FM-800 technical specifications.............................
! FM-850 technical specification..............................
12
SECTION 1
GENERAL INFORMATIONS
A)
Introduction
Thank you for purchasing one of the fine products made by DECADE
transmitters. Your new FM-800 or FM-850 HI-FI STEREO FM
TRANSMITTER is a very high performance and high reliability piece of
equipment. Before using it, please read this manual carefully in order to
obtain the best possible results from your transmitter. The manual
contains installation, operation and programmation procedures for
DECADE FM-800 (1.8 Watts) Hi-Fi mono and FM-850 (1.8 Watts) of Hi-Fi
Stereo FM Transmitters.
B)
Description
FM-800 and FM-850 transmitters include a high precision crystal
controlled VCO, a digital stereo generator (FM-850 only), an RF power
amplifier and a spurious filter. They accept left and right audio signals on
two types of input connectors:
XLR3: 600 Ohms balanced inputs, with signal levels of -4dBm min.
1/4": 6 to 10K Ohms unbalanced inputs, with signal levels of
10dBm min.
Input level can be ajusted from the INPUT LEVEL control on the front
panel, in order to get the optimum modulation level. That useful feature
makes DECADE transmitters very versatile, allowing them to accept audio
signals from many sources.
C)
Warranty
FM-800 and FM-850 tranmitters come with a two (2) years warranty that
covers parts replacement and labor required to repair any defects
resulting from the manufacturing process. All claims must be authorized
by DECADE prior to shipment of a faulty unit for repairs and a copy of the
invoice must be included in the shipment. Shiping fees are assumed by
the client and DECADE will pay for the return of the repaired unit.
D)
Warning
DECADE transmitters operate on the 87.9 MHz - 107.9 MHZ commercial
FM broadcast band, so signals transmitted by them can be received on
any standard FM receiver. Thus, some care should be taken in the use
made out of these transmitters.
DECADE transmitters inc. is not responsible for any loss of profit or
laws violation during the utilisation of their transmitters.
The FCC legislate the use of FM transmitters.A license or special permit
from FCC is required for the operation of these units.
E)
Technical specifications
Refer to annexes, Technical specifications of FM-800 and FM-850.
4
(FRONT & BACK PANEL DIAGRAMS)
FREQUENCY (MHz)
FM -8 5 0
11
OVER
BASS BOOST
12
TUNING
LOCK
STEREO
13
14
INPUT LEVEL
POWER
POWER
MODULATION
H I - F I S T E R E O F M T R AN S M I T T E R
FREQUENCY (MHz)
FM -8 0 0
10
11
POWER (WATTS)
NORMAL
12
TUNING
LOCK
OVER
13
14
INPUT LEVEL
POWER
POWER
MODULATION
H I - F I F M T R AN S M I T T E R
17
16
AC INPUT
POWER (WATTS)
NORMAL
15
18
FUSE
0.5 A slow blow
19
20
LEFT INPUTS
RIGHT INPUTS
21
FCC ID: Verification: This unit complies with FCC
technical requirements.
DOC/MDC: CAN 1857 231 175
CAN 1857 231 113
MFG :
DECADE TRANSMITTERS INC. SHERBROOKE (QUEBEC) CANADA
BALANCED
UNBALANCED
BALANCED
UNBALANCED
MODEL : FM-800
S/N : 0000
DECADE TRANSMITTERS INC.
SHERBROOKE (QUEBEC) CANADA
http://www decade ca
RF OUTPUT
50 ohms
FRONT & BACK PANEL DESCRIPTION
Frequency display:Displays the programmed
FM frequency (87.9 -107.9MHz)
Frequency programmation switches: Directly dial the
FM frequency.
Power display: Displays the programmed RF power
in Watts.
14
Power switch: Controls the AC power to the
transmitter.
Power programmation switches: Directly dial the RF power .
15
AC input:This is where you plug the AC extension
(furnished with the transmitter).
Modulation LEDs :Indicates the status of audio signal being
modulated.Green led (5) indicates normal modulation(100%
and less).Red led (6) indicates over modulation(100% and more) .
16
Bass boost switch:When activated,the bass boost switch enable
a circuitry that will produce a 6dB gain from 20Hz to 150Hz .
17 19
Balanced inputs: Accept a low impedance,
balanced (600 Ohms),line level audio signal.
Note: The left & right inputs are electronicaly
mixed to produce a mono signal (FM-800).
Bass boost LED: Indicates that the bass boost is activated.
18 20
Unbalanced inputs: Accept a high impedance
unbalanced (10K Ohms),line level audio signal.
Note: The left & right inputs are electronicaly
mixed to produce a mono signal (FM-800).
12
13
Stereo switch:When activated,the stereo switch enable a
Power LED: Indicates that the AC power
has been activated.
Input level: Controls the audio level that is
applied to the transmitter’s audio section.
Fuse outlet: Main AC input fuse holder.
digital circuitry that will produce stereo broadcasting.
10
11
21
Stereo LED: Indicates that the stereo mode is activated.
Tuning lock LED: Indicates that the transmitter’s parameters
have been stabilized and that the RF output section has been
activated.An intentional delay of 4 seconds will occur .
RF output: This is where you plug your coax
cable that will reach your transmitting antenna
(S0239 connector type,50 Ohms impedance).
Note: It is recommended to use the best coax
cable quality and as short as possible, in a
manner to avoid RF power loss.
SECTION 3
INSTALLATION
A)
Introduction
Installation of a DECADE FM transmitter includes the following steps: 1) receiving
inspection; 2) mounting in a rack or on a shelf; 3) connection of the AC supply and audio
source; location, installation and connection of the antenna (optional).
B)
Receiving inspection
Check the transmitter packaging for any damage that could have occured in the shiping. If
you find any damage on the transmitter, keep the packaging for claiming purposes with the
freight company. Any damage should be noted on the receiving slip at the time of delivery
and the freight company advised within 5 workable days following the delivery of damaged
units.
C)
Connections
After installation of the transmitter in a rack or on a shelf, plug the AC cable in the AC
receptacle on the back panel, and connect to a 120 V, 60 Hz grounded AC socket. As with
any grounded electric equipement, it is not recommended to use a DECADE transmitter
without a grounded AC socket, or removing the grouding pin on the cable, since that may
result in shock hazards for the staff in contact with it.
D)
Location of the transmitter and antenna
DECADE transmitters are designed for indoor or outdoor use in a dry environment, in
temperatures ranging from -50 to 50 °C. In order to obtain optimum performances, it is
recommended to place them far from any electromagnetic noise source (transformers,
motors, etc.).
Antenna should be located in a manner to comply with FCC regulations.
SECTION 4
OPERATION
A)
Controls and indicators
FM-800 and FM-850: Input level is controled by a stereo (FM-850) potentiometer, labeled
INPUT LEVEL and located on the front panel. Two leds indicate the modulation level:
NORMAL (green), wich lights up when the modulation level is equal of 50% to 100%, wich
indicates a normal modulation state that is required for an undistorted signal at the
receiving end.OVER (red), wich lights up when the modulation level is equal or greater than
101%, wich indicates an overmodulation state and could result in distortion at the
receiving end. The OVER indicator shall never or rarely light, in order to avoid distortion. To
allow a better perception of this indicator, its holding time has been lenghtened, because of
its importance.
The FM-850 transmitter can be switched from mono to stereo mode, in order to let you use
the best mode for your particular application. The stereo selector is located on the front
panel(STEREO). When in stereo mode, the STEREO indicator lights up.In mono mode,
both inputs are active (balanced or unbalanced).
Tuning lock: This indicator (front panel for FM-800 & FM-850 models) will lite up to show
that your choosen FM frequency has been validated and that the RF output is active.A
delay of 3 to 4 seconds is necessary before the system stabilize itself.This delay is
mandatory in a manner to
avoid frequency scrambling while it is in the stabilisation process.
Bass Boost: This control (FM-850 only) when activated,will produce a bass boost of 6dB
from 0Hz to 100Hz.This feature will enhance the bass
response of any type of FM receivers,specialy those that are not equipped
with a bass boost function.
B)
Input and output connectors
FM-800 and FM-850 transmitters come with two sets of inputs: RIGHT and LEFT XLR3
balanced inputs and RIGHT and LEFT 1/4" unbalanced inputs, wich are the two most
popular types of input connectors.
The RF output has a female UHF (SO-239) connector and typical load impedance is 50
Ohms. Antenna cable (RG-8 or RG-58) should not exceed 100 feet in lenght for RG-8 and
50 feet for RG-58, in order to minimise the power loss in the cable.
C)
Optimal input level
Optimal input level is reached when the OVER modulation indicator remains off at all time.
Adjust the input level control to meet that condition. To obtain this result it is mandatory to
compress the audio input signal (between your audio source output and the inputs of
the transmitter inputs. The over modulation LED on the front panel shall never or
rarely lit up.The level has to be adjusted in a maner to avoid over modulation.
SECTION 5
MAINTENANCE AND PROGRAMMATION
A)
Maintenance
No maintenance is required to keep the transmitter in top operating condition. If an external
cleaning appears neccessary, use a soft, damp cloth and mild soap only.
B)
Frequency programmation
The transmitting frequency is user programmable via a set of 4 decimal rotary switches
(below the FREQUENCY digital readout) on the front panel (FM-800 & FM-850).
1)
While the transmitter is off (Power switch is off),determine the frequency of your choice
and compose in a squential fashion(from far left switch to right), the number of your
choosen FM frequency.
Ex: 102.3 MHz: First switch(far left)= 1, Second switch= 0 ,Third
switch = 2 and Fourth switch = 3. Basicaly,what you are doing,is
that you directly write the frequency number in Mega Hertz.
Notice: While it is possible to select and read an FM frequency below and above the
restricted frequency range (Ex: 80.1MHz or 195.9MHz),the system will always validate
the lowest or the highest permissible FM frequency instead.The lowest being 87.9MHz
and the highest being 107.9MHz.It is also applicable for a selected even frequency
(Ex: 88.2MHz),where the system will validate the nearest odd frequency instead (
88.3MHz).
CAUTION: Never perform a frequency programmation while the unit
is powered (power switch on).
2)
C)
Activate the power switch (front panel) to ON position.A delay of 3 to 4 seconds is
required for stabilisation.The Tuning Lock indicator (front panel) shall lite up and
activate the output section as soon as the stabilisation delay is over.You are now ready
to broadcast.
RF power level programmation
The transmitting RF power is user programmable in the range of 0 Watt to 1.8Watts,in
increments of 50 miliWatts, via a set of 3 decimal rotary switches (below the POWER digital
readout) on the front panel
(FM-800 & FM-850).
1)
determine the RF power of your choice and compose in a squential fashion(from far
left switch to right), the number of your choosen RF power.
Ex: 500 miliWatts: First switch(far left)= 0, Second switch= 5 and Third switch = 0.
Basicaly,what you are doing,is that you directly write the RF power number in Watts
(500 miliWatts =.050 Watts).
Notice: While it is possible to select and read an RF power above the restricted
frequency range (Ex: 1.95 Watts),the system will always validate the highest
permissible RF power instead.The highest being 1.8 Watts.
NOTICE: It is possible to select a new RF power while the unit
is powered (power switch on).
10
SECTION 6
APPLICATIONS
Applications for DECADE transmitters are subject to FCC regulations , where a license is required.
These units comply for the new FCC LP10 class concerning non profit community FM
broadcasting
applications.Please consult your nearest FCC bureau for further details concerning license
demand.
11
TECHNICAL SPECIFICATIONS
FM-800
RADIO SECTION:
MODULATION: FM, deviation of 75kHz
FREQUENCY RANGE: from 87.9 to 107.9 MHz (programmable)
FREQUENCY PRECISION: 0.0008% or better
HARMONICS REJECTION: 55 dB min., 60 dB typ.
OUTPUT POWER: 0 mWatt to 1.8Watts, programmable in increments of 50 miliWatts.
LOAD IMPEDANCE: 50 Ohms typ.
ANTENNA CONNECTOR: UHF-F (SO-239)
NOTIFICATION STANDARD: FCC Part 73 (Verification )
CONTROLS & INDICATORS: Frequency selection and readout,Power selection and readout,
Tuning lock status.
AUDIO SECTION:
MODE: mono (HI-FI)
FREQUENCY RESPONSE: 20 Hz - 20 000 Hz, @-1dB
TOTAL HARMONIC DISTORTION: 0.05% max.
SIGNAL TO NOISE RATIO: 70 dB min.
DYNAMIC RANGE: 80 dB min.
INPUT IMPEDANCE: 600 Ohms balanced (XLR), 10K Ohms unbalanced (¼")
CONNECTORS: 2 X XLR3 and 2 X ¼" female jacks
INPUT SENSITIVITY: balanced: 0dBm min.. unbalanced: -6 dBm min.(both inputs in use)
INDICATORS:Normal and over modulation,power.
CONTROL: input level, power switch
MISCELLANEOUS:
POWER REQUIREMENTS: 120 V, 60 Hz, 40 VA
AC PROTECTION: grounded AC plug and 500 mA slow blow, 120 V fuse
DIMENSIONS: 19" x 11" x 1.75" (48 cm x 28 cm x 4.5 cm), 1 rackmount space
WEIGHT: 12 lb (5.45kg)
DECADE Transmitters reserves the right to make changes or improvements in manufacturing or design of its products, wich may affect
specifications.
12
TECHNICAL SPECIFICATIONS
FM-850
RADIO SECTION:
MODULATION: FM, deviation of 75kHz
FREQUENCY RANGE: from 87.9 to 107.9 MHz (programmable)
FREQUENCY PRECISION: 0.0008% or better
HARMONICS REJECTION: 55 dB min., 60 dB typ.
OUTPUT POWER: 0 mWatt to 1.8WattS, programmable in increments of 50 miliWatts.
LOAD IMPEDANCE: 50 Ohms typ.
ANTENNA CONNECTOR: UHF-F (SO-239)
NOTIFICATION STANDARD: FCC Part 73 (Verification)
CONTROLS & INDICATORS: Frequency selection and readout,Power selection and readout,
Tuning lock status indicator.
AUDIO SECTION:
MODE: stereo/mono (HI-FI)(selectable)
FREQUENCY RESPONSE: 20 Hz - 15 000 Hz, @-1dB *
TOTAL HARMONIC DISTORTION: 0.05% max.
SIGNAL TO NOISE RATIO: 65 dB min.
DYNAMIC RANGE: 80 dB min.
STEREO SEPARATION: 40 dB min., 45 dB typ. **
INPUT IMPEDANCE: 600 Ohms balanced (XLR), 10K Ohms unbalanced (¼")
CONNECTORS: 2 x XLR3 and 2 x ¼"
INPUT LEVEL: balanced: -4dBm min.. unbalanced: -10 dBm min
INDICATORS: Normal and over modulation indicators , stereo and bass boost indicators
CONTROLS: input level , mono/stereo selector,bass boost selector
* Broadcast standard
** The minimum required separation for FM transmitters is 25 dB. The best receivers have a separation of 40dB, so the effective separation is
more a matter of the quality of the receiver.
MISCELLANEOUS:
POWER REQUIREMENTS: 120 V, 60 Hz, 40VA
AC PROTECTION: grounded AC plug and 500 mA slow blow, 120 V fuse
DIMENSIONS: 19" x 11" x 1.75" (48 cm x 28 cm x 4.5 cm), 1 rackmount space
WEIGHT: 12 lb (5.45kg)
DECADE Transmitters reserves the right to make changes or improvements in manufacturing or design of its products, wich may affect
specifications.
13

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Create Date                     : 2002:06:21 15:34:28
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EXIF Metadata provided by EXIF.tools
FCC ID Filing: MCHFM-800

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