LPB AM-60P Manuel utilisateur

• Ine. 28 Baeton Hili Road. F'raz.r. PA. 1

gJ~~

(21

~)B44-'

123

INSTRUCTION MANUAL·

for

MODEL AM-60P

........

.......

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.......

......

.......

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...

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PSSA

PSRA

LOW POWER

AUTHORIZATION

AM Broadcast Transmitters

AM-60P AM-30P

Since 1960, LPB has been the internationally

recognized leader in low power AM broadcasting.

LPB uses the very latest RF technology to provide

the most rugged and economical transmitter for low

power commercial applications, travelers' informa-

tion and carrier current systems.

The AM-30 and AM-60 series transmitters use an

internal meter to monitor modulation level and RF

power output. Modulation level on the AM-5 is

indicated by a quick response LED peak flasher set

to illuminate at 100% peak modulation. This indi-

cates true peak modulation of the transmitter and

provides a means of maintaining maximum undis-

torted modulation ofthe signal. RF power onthe AM-

5 is monitored by a second LED that also serves as

a "power on" indicator. RF output power is continu-

ously variable on all transmitters so that a precise

setting can be chosen by the user.

All LPB low power transmitters are designed for

universal application including AM stereo. With a 50

ohm unbalanced RF output, any transmitter can

readily interface with direct radiating systems using

impedance matched radiators. The companion

TCU-30 Transmitter Coupling Unit is used for carrier

current installations and other applications utilizing

non-standard radiating elements.

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AM-5

Transmitter Specifications

R.F Power Output

AM-5 Adjustable, 1 to 5 Watts (carrier)

AM-30 : Adjustable, 2 to 30 Watts (carrier)

AM-60 .......................•......•..................................................... Adjustable, 6 to 60 Watts (carrier)

R.F Power Adjustment ...........•.....•....•.....•....•.....•......................•............................. Internal

R.F Power Indicator

AM-5 Green LED

AM-30, AM-60 Internal Meter

Type of Emission ...........................•.....................•............................ 30A3 (Amplitude Modulation)

Frequency Range ................•..................................................•................. 530 kHz to 1610kHz

R.F Output Impedance ................................•................................•.............. 50 ohms, unbalanced

SO-239 connector

Carrier Frequency Stability

.003%, -20°C to + 50°C

105 to 128 VAC line (-4°F to +122°F)

R.F Harmonic Suppression ........................................•.................................... <45dB below carrier

Carrier Shift ................................••.....•.....•.................................. '.' ... < 2%, 0-100% Modulation

Noise Level ........................•....•.....•..........................•........... < 55dB below 100% modulated carrier

Audio Input Impedance ...............•.................................•..................... 600 ohm, transformer balanced

Audio Input Level -15dBm to +1OdBm for 100% Modulation

Optional Limiter Factory set to prevent more than 100% Modulation

Attack Time: 3.3 ms

Release Time: 330 ms

Audio Frequency Response 20 Hz to 15 kHz

1.0dB

Audio Distortion ................................................•...........................•........ < 2%, 95% Modulation

Modulation Indicator

AM-5 ................................................••....•....................................... Red LED peak flasher

AM-3~, AM-60 ..................................•........................................................... Internal Meter

Modulation Control ......•....•................•........................................................ Internal Adjustment

Power Input 117VAC, 50/60 Hz

Power Consumption

AM-5 ...................•..............................•...............................•....................... 45 Watts

AM-30 ..........................................•............................................................. 150 Watts

AM-60 ......................•............•..........................•......................................... 250 Watts

Dimensions

AM-5, AM-30 ............................................................................•........... 12"H, 6.5"D, 11.75"W

AM-60 ................•.............•..........................•......•................................. 12"H, 6.5"0, 23"W

Weights

AM-5 .................................•..................................•............•.......................... 121bs

AM-3~ 20 Ibs

AM-60 ..........................................•................................................................ 36 Ibs

LPB

LPB Inc.

28 Bacton Hill Road, Frazer, Pa. 19355 (215) 644-1123 3/88

( M_O_D_E_L_T_C_U_-_3_0_Th_'a_ns_m_i_tter_C_o_up_l_in_g_a_n_it

.•• l'i'

tai.so

Meter

Detail

•

The LPB Model TCU-30 Transmitter Coupling Unit is required when

coupling an AM transmitter into a non-impedance matched inductive

radiator, such as electrical power wiring systems or other distributed

wiring systems. The TCU-30 is the third generation result of over 20

years experience and product development in carrier current

technology.

All functions required for optimum coupling (matching) into single or

3-phase power systems are provided by the TCU-30 including power

line inductance correction, impedance selection, power line isolation

and complete metering.

The TCU-30 is specifically designed to eliminate internal toroid

heating, one of the major causes of coupling unit failure that has

plagued all previous designs. Other innovations include extremely

broad impedance matching selection (21 steps) and a calibrated

transmitter power output meter with a direct reading VSWR scale. Such

metering allows accurate measurements of power and VSWR from

only one watt to the rated maximum output of 30 watts.

With modular construction, any two units in this equipment series can

be rack mounted. For additional flexibility, the individual units may be

wall mounted in any convenient configuration.

TCU-30 SPECIFICATIONS

Power Input 30 watts RMS, continuous

Input Impedance 50 ohms, unbalanced

Output Impedance 0.5 ohms to 65 ohms (1:1 VSWR)

0.2 ohms to 130 ohms (2:1 VSWR)

Output Impedance Selection 21 steps

Frequency Range 530 kHz to 1610kHz

Inductance Correction 100 pf to 10,900 pf in 109 steps

Matching Circuit 2 stage toroidal, bifilar

and pentafilar wound

Input Connection SO-239 coaxial connector

Output Connection Screw-terminal barrier strip

AC Line Connection

(output) 660 VAC line to line (1100 VAC optional)

380 VAC line to ground (635 VAC optional)

Metering Transmitter power output (0-30 watts)

Voltage Standing Wave Ratio (1:1 to 6:1)

Dummy Load 50 ohms, non-inductive

Controls 21 position impedance selector

2 capacitor decade selectors, capacitance

decade IN-OUT, SWR calibration

Function switch: Power, Calibrate, Test (Match), Operate

Minimum Power Input

for accurate matching 1 watt

Size 12"H, 6.5"D, 11.75

Mounting .................•.......... Wall mount or rack mount

Weight 15 Ibs

LPB

LPB Inc.

28 Bacton Hill Road, Frazer, Pa. 19355 (215) 644-1123 3/88

[~_M_O_D_E_L_L_A_-_3_0_3_0_-wt_'a_tt_L_in_e_Ur_RF_A_m_7fJ_ll_ift_'er

The LPB Model LA-30 Linear RF Amplifier is used as a 30 watt signal repeater to boost the RF output signal

within an RF distribution system or a carrier current system in a very large building or complex of buildings.

SPECIFICATIONS

R.F. Power Output Adjustable 2-25 watts

Frequency Range 530 to 1610kHz

Distortion Intermod 30dB down or

better at 30 watts output

R.F.Input Impedance 50 ohms resistive

Input Level 0.25 watts min. 2 watts max.

(3.5 to 10 vrms carrier)

Connectors 2 type SO-239

coaxial connectors

Power Requirements 117 VAC, 50/60 Hz,

150 watts maximum

Weight 15 Ibs.

Size 12"H, 6.5"0, 11.75"W

[~_M_O_D_E_L_T_-_1_A_R_ow_er~~_uu_~

The LPB T-1 A Power Splitter accepts an RF signal output from a low power AM transmitter and divides the

output power into equal portions. This may be required to drive two or more RF distribution systems in adjacent

locations.

Standard models of the T-1A are available to divide the input power into 2, 3, 4, 5 or 6 equal portions.

SPECIFICATIONS

Input Impedance 50 ohms, unbalanced

Output impedance 50 ohms, unbalanced

Power Input Up to 50 watts RMS, continuous

Frequency Range 360 kHz to 2 mHz

Outputs ..... 2,3,4,5 or 6 (specify when ordering).

Insertion Loss 3dB per output

Input/Output Connections Standard SO-239

coaxial connectors

Dimensions Width 6.25", Height 7.25",

Depth 2"

Weight Approximately 14 oz.

Special division ratios and impedance levels available to order.

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LPB "NF" Series Radiating Cable is a controlled radiation "leaky"

coaxial cable for use in Restricted Range AM Broadcast Systems.

The NF-1 0 Cable is designed for use where no more than a 1,000

feet continuous linear transmission zone is required. The NF-2D cable

is a lower loss, heavy duty cable, which may be used for a linear

transmission zone of up to 5,000 feet.

Construction Coaxial, with drain wire

Dielectric Solid polyethylene

Jacket Polyvinylchloride (direct burial)

Characteristic Impedance 50 ohms, @1 mHz

Dimensions NF-1 0:

'14"

Dia., NF-2D:

7116

Nominal,

Max. Dia.

LPB

LPB Inc.

28 Bacton Hill Road, Frazer, Pa. 19355 (215) 644-1123

SPECIFICATIONS

3/88

SECTION

1.0

2.0

2.1

2.2

3.0

:3. 1

3.2

4.0

4.1

4.2

4. :::

4.3.1

4.:3.2

4.4

5.0

5.1

5.2

6.0

6.1

6.2

7.0

7.1

7 ')

I,L

8.0

9.0

10.0

INSTRUCTION MANUAL

LPB MODEL AM-60P TRANSMITTER

PSSA/PSRA LOW POWER AUTHORIZATION

TABLE OF CONTENTS

DESCRIPTION

·INTRODUCTION

WARRANTY AND SERVICE INFORtv1ATION

Lirniteej Warranty

Service

APPLICABLE FCC RULES

FCC

leierinq F:equirernents

Advisinq the FCC

CIRCUIT DESCRIPTION

Surnrnary

Power

Supply

Exciter

Au(lio

Oscillator

HF Pre-Driver and Driver Sta~les

HF Power Arnplitier

INSTALLATION

Location and

10untinq

tntertaoinq tt-,eTransmitter

CONTROL SETTINGS AND OPERATION

User Control

uescriptlon

and t.ocation

Setup

and Operaiion

MONITORING AND REMOTE CONTROL

Modulallon t-tonitorinq

LPB Tri-power Opilonai rernote

BASIC TROUBLESHOOTING GUIDE

MAINTENANCE

PARTS LIST AND SCHEMATIC

PAGE

\_-----

INSTRUCTION MANUAL

LPB MODEL AM-60P TRANSMITTER

PSSA/PSRA LOW POWER AUTHORIZATION

1.0 INTRODUCTION

Low Power AM Transmitters are the product of LPB's nationally ree(l(;lnized

oroadcast

experience since

1960. This 'P'

version solid state transmitter utilizes state-

of-the-art tec:hnolo9Y and has been Type Approved for licensed use under F'AHT 7:~:oi

the

FCC

Hules

and

He9ulations.

The transrnitter power output (TPO) of 60 watts

adjustable down to about 10

watts, Two F:Fpower amplifiers are driven

the standard "P" version exciter. Their

cutouts .•

t·,',

tl'l

p", ,.,,')

'Yl

t'l

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torr o

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(',<1"'," ,'.,-, •.•.•

1-.

i,',,',.' ••.

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c (....

t:=" ......•

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F .'

,-V

t:='

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t•

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Uti

c::

I • ~. I I 1- I

.J ••.

r::

option is available for remote power reduction. This option is ( esGrilw(j I;':j.terin this

manual,

2.0 WARRANTY AND SERVICE INFORMATION

Z.l

Limited

Warranty

We guarantee that you

will

fin(l the appearance, workmanship and

standards ot ..aterial z '1" rstr

tion

ot ttus

eouiornent

k~""(

'·t·ltl·~·~n·I'·'·~j'··

~ Llll

L1I

t " ~)

L1 ...

II"

fUo I.JII.J

L e

.1.

I" •

rIe

II In '.'

1I1::l

Wit.

,I.

'.1

<.'

.10

and with qoo d standards of commercial practice.

For a period of one year frorn date of delivery,

VJe

guarantee

U'ds

equipment aqainst any

fOITIi of

failure provided that, in the opinion of

H'IE'

marunacturer,

no improper use

mooitication

to this equipment is at fault The 9uarantee also

requires that the equipment is properly installed and operated within state(j parameters.

·"1tl"I:" .'

LPB

'11t

'1:'1

.rt "rl""-

jl'-I'" ",'

'I:'I"'\II:' '

,·,,··rCl,·,t·-·\

Will£'

II.•pe lo ., WI

Urnl.•1

nl.1,ell.:.1."

.1n(

,(1.. ... 1

II.

our"

.1..'1)"

0 ,....lI, ..-...._.:1 IY

failure. SI'dpping charges are the responsit.ility of the customer.

After warranty expiration, service will continue to be available horn LPB.

Z.Z SERVICE

TI"

<' ,:,,',

pment is

,',co "

('1

n,.".,.::.

'··l·j

( f' ,',

stn

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uts an

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t:=..):;J

Ct.

ull

I .~·JJI~" '. _~ ~ _ '"•., _

11.4 II

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minimum failure. If any problem or question should arise, please call or 'Nrite LF'E:

storner S..

·('~··("··I··~t~1

ldenlilioalior

··d·l· ..

atior nlot

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I('nrrl

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vlce

PAGE (1)

------------------------------------------------~~------~

wnen

callinq or writing inctudes: rni)clel number, serial number, operatinq frequency

and date 01purchase. This information is found on the indentiticaiion label on the

transmitter.

This equipment

in qeneral, IS NOT USER SERVICEABLE. Ifa

maltunctlon arises or

suspected,

we urqe you

return the equipment to Ihe taotory

for proper repair.

If tlw

neer:1for service arises contact LPB's

Customer

Service Departrnent

for

a Material Return Authorization (MRA)

and

snippinq instructions

before

shipment.

The

MR/l.

number

must

be on the shippinq

lal:lI:-1.

LPB, Inc. Phone 215-644-1123

FAX 215-644-:3651

3.0

APPLICABLE FCC RULE

3.1 FCC Metering Requirements

In paraqraph 10 of Report

and Order

in the

matter

t"'/v

Docket 85-1 25,

adopted December 20, 1985, the

Cornrnission

ammended Part 7:~:.5:3 lo

read as

follows:

"However, auxiliary transmitters with nominal power ratinqs of 100 watts or

less are not required to be equipped

witti

instruments to cieterrnine power

t)y

the indirect

method

provided

that

tt-Ielicensee can

deterrnine the

antenna

input

power

atl

times."

The Relative Power Output meter in the LPB

A vI-60P

lransmitter

dews

nol

satisfy this metering requirement. We suqqest the licensee ernploy an Antenna Current

t.J eter, such as the Simpson model

37 (3-1 J2'rJ HF

Ammeter,

V/t-Ien

okinq

into a

ohm load, the

60-watt

transmitter needs a 0 - 1.5 A.

full-scale ammeter.

It shoulc be noted that the Commission does not require this HF ammeter

rueter to be in the circuit at all times, however, you must have and use this capability to

measure

the output.

3.2 Advising

the FCC

When installing a transmitter for use with low power authorization,

nIl?

user must advise the Commission, in writing, of this action. TI-;8rnake an,] rnoclel

number of the transmitter must be submitted.

PAGE (2)

~--------~~------------------

AM-60P TRANSMITTER BLOCK DIAGRAM

RF OUTPUT

RELATIVE RF

f------

POWER METER

COMBINER

RF POWER

MODULE

SPLITTER

EXCITER

RF POWER

MODULE

POWER SU PPL Y

I------'

POWER SUPPLY

PfrlI13"

AUDIO INPUT

FIGURE #1

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