Larcan MX10V Modulated translator User Manual 53747

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Document ID	53747
Application ID	wRo5CUizhPTkg931lA/lzg==
Document Description	8
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	173.84kB (2173029 bits)
Date Submitted	1999-08-12 00:00:00
Date Available	1999-10-01 00:00:00
Creation Date	2001-06-01 08:56:08
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-06-01 08:56:35
Document Title	53747.pdf
Document Author:	jsoscia

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CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER FROM THIS
UNIT. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL SEE ADDITIONAL SAFETY INSTRUCTIONS BELOW.
NOTE TO CATV SYSTEM INSTALLER
IMPORTANT SAFEGIIARDS
Readlmzrucuom-Au the safety ind opening instructions slwuldbcreadbefun this mduuisopaulect
filial" lnslrueuens- The nfety and opening instructions should he remind for (“mm refuge;
HeedWamings-Aummmwmzmhmmfiqmfimuwdumacaw.
Fellow Inshucllons - All operating and use insuucuuns should be followed.
Cleanlng - Unplug this product hm the wall mullet before chaining. Do not use liquid claws or wusol clams. Us:
a damp cloth for clanin;
Attachmems~Do not usemhmmts notrecammnded byBloudsrTongueas thcymayuusehmrrls.
WaltmdMulsture-Donntusethiswuduclnfixwaer-furmplgnarab‘ihmb,wuhhowl.ldmheushk, or
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suiousinjwytouchilderadulgmdserlousdnmngcmihepmdun Useonlywithaumstand. Mutable
Whyhlmder‘rmgue. Any mounting oflhcpmduct should followlh: Mons, and shoulduuea
manningwymmmeudaibyBlnndu-Tongu
351130300 G
Q BLONDER TONGUE LABORATORIES, me.
One Jake Bmvm Road, Po. Box 1000 Old Bridge, NJ 08857-1000 USA
Tel: (732) 5794000 Fax: (732) 579-4353
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14.
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18.
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21.
lithisvidee product is equipped wrmaponnndumnwmtuupmu-prug raving onebllde widerthanthc
otherLtheplugwill fitinlorhepowerwtletonly oneway. This it! safety feature. lfyou areunubletniruertdiephls
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theprodiafl.
Servicing -Do notammrpttoservieedrispmduetyourselfas opennigormnovingcwers may exposeyou m dnngem
voltage or othethnurds, Refer all servicing to qualified saw-ire pawl.
Darlings Requiring Service - Unplug this product hour the well outlet and refer servicing to qualified service
pummel rmder the following condition:
When the power-supplyeord or plug is damaged.
Illiquid has been spilled. or objects have fallen into the product.
lithe product has been exposed to rain or mter.
lithe product does not operate normally by falloWing the operating instructions. Adjust only these controls that
are covered by the operating instructions as In improper adjustment of other controls mly result in damage and
will often require extensive work by n qualified technician to restore the product to its normal opemtion.
e. Ifthepruducthas beendmppedortheahinethnsheendanupd.
I'. When the product exhibits a disu‘netclunxe in perlmnance-thisindieam a need for service
Replacement Parts - When replacement parts are required. be sure the service Imhnieian has used repleeernentpuns
specified by B1nnder Tongue or have the nine chancuer-isticsns the original part Uneuthnrimd subsu'mn'oru my rustlt in
fire, electric shock or other hazards
SafetyOhodt-Upon mpletiunot‘nny servieenrrepaintn thispmduetask these-vine technician to pufomsnt'ety
ducks tndeterminethatdtepmductishipropaupmfingeondition.
Outdoor Antenna Grounding - Ifan outside antenna or able system is contracted to the product. be sure the autumn
of cable systan is grounded so as to provide some protection mine: voltage surges and built-up static charges. Section
810 of the National Electriml Code. ANSVNl-‘PA No. 70, provide: information with rspeet to prope- gmmdius of the
must and supporting smwture, grounding of the lend-in wire to m antama discharge unit, size of grounding conductnls,
Ioontion of antennadischnrge unit, connection to grounding electrodes. and rqllire‘ments for the pounding electrode.
1-1er
Seemteslnddiegram below.
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL
ELECTRICAL CODE INSTRUCTIONS
1. Drill a hole in wall (Cardul!
there are wit-s in that wall!)
nar set just large enough to
permitenn'yot‘cahle.
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form a nin drip lnq: close to
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3. Put a small mtmt ofuallking
around cable where it utters
horse to keep out draflst
4. Install static electricity
discharge unit
5. Connect autumn cable to set
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INSTALLATION AND OPERATION
NOTE TO CATV SYSTEM INSTALLER
\-’ This reminder is provided to cell the CATV System Installers attention to Article 820-40 of the NEC that provides
guidelines for proper grounding and. In partlcular, spedlles that the cable ground shall be conneaed to the
grounding system of the building. as close to the point of cable entry as practical.
UNFACKING AND HANDLING
UNPACKING. Each unit is shipped with all
equipment assembled. wired, foamy tested, and
than packaged in an appropriate shipping container.
Ensure that all accemries are removed from the
container and packing material before they are
discarded. This includes the lF Jumper Cable which
mist be installed to make the unit operational.
MECHANICAL INSPECTION
Inspect the front and rear of the equipment for
shipping damage. Make sure that the equipment is
V clean, and no wires, cables or connectors are
broken, damaged or loose.
PRECAUTION
Avoid Heat Buildupr
Ensure Easy Access to Rack Wiring.
F-ciliato Servicing and Maintenance.
Avoid Direct Heating of Air Conditioning.
AC Power Source Outlet;
Rock support.
Building Leakage.
DAMAGE IN SHIPMENT
Should damage be discovered after unpacking the
syaem, immediately file a claim with the carrier. A
full report of the damage shall be made and a copy
fomarded to Blonder Tongue Laboratories, me. The
company will then advise what disposition is to be
made of the equipment
PRECAUTIONS
Adherence to the initial installation precautions
outlined in the Table below will help prevent
problems arising during initial installation and future
maintenance of the unit.
Allow (1) EM rack space (1-314') between Units in the equipment racks.
Allowa mlnlmumol ill' clearance behind equlpment raolris).
Allow 1 minimum of 38" clearance In front ol equipment reck(s)4
it unavoidable, use deflector plates.
Locate equipment near enough to outletsto provide power tor test
equipment and power tools.
Mek- oertain rack support: are sulliciently rigid to support rack(s).
Beware oi dripping water onto equipment from leaky roofs, waveguide roof
entries. and cold water plpe condensatinns,
TABLE 1 Installation Precautions
P'PP‘!“
10.
11.
12.
13.
OPERATING CONTROLS
, .. BLON'DER o D
D e wlTONGUE
we met”:
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Front Panel Controls and Indicators
EXTERNAL IF LED - When the External IF option is present. the LED indicates that an extemai IF
signal has been selected over the internally generated IF signal as the source for the IF out
VIDEO OVERMODULATION LED - Lights when the modulation exceeds 87.5%
VIDEO LEVEL - Adjusts the percentage of video modulation
AURAL CARRIER - Controls the amplitude of the aural carrier to change the aural/visual ratio
AUDIO LEVEL - Adjusts the aural can1er modulation. When stereo option ls present, should be set fully
CW
AUDIO OVERMODULATION LED - Lights when the aural can'ier peak deviation is over 25 KHz in
Mono mode and over 55 KHz when the Stereo option ls present and the rear panel audio select switch
is set to stereo
EXTERNAL REFERENCE LED - When the External Reference option is present. the LED indicates
that the internal visual carrier is phase locked to the external reference input
POWER LED - Indicates power is present and the fuse is good
MONO/STEREO MODULAflON - Contmls the modulation of the aural carrier when the Stereo option
is present
BTSC STEREO LED - When the Stereo option and video input are present, the LED indicates the
presence of the stereo pilot tone
~2il dB RF OUT- Test point output 20 as below the RF output
CHANNEL - The channel numher on the OFM—so module is visibte through this windmv
RF LEVEL - The Bridge-T pot simultaneously adjusts the amplitude of the aural and visual centers to
the final drive amplifier
P'PP'N
8.
OPERATING CONTROLS (Cont'd.)
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Rear Panel Controls and Connections
IEC POWER RECEPTACLE WITH FUSE - The provided power cord Is plugged into this receptacle. A
slide—out drawer contains the Ac (use
RF OUT - The filtered RF signal is available for connection to a headend combiner
IF IN - The composite lF signal is looped to the PLL I Up-oonverter
IF LOOP - An Fto F jumper cable Is provlded to loop the IF OUT to the IF IN
IF OUT - The combined SAW filtered and modulated IF slgnal appears at this port
EXTERNAL IF IN - For use with the External IF option
7 at at REFERENCE LOCK LOOP - For use with the Reference Lock option
10.
11.
12.
13.
AUDIO SELECT- Switches between the Mono and Stereo (when stereo option is present) mode of
processing for the eudlo Input
VIDEO IN- The modulator accepts standard negative sync video at a 0.7 to 2 5V pp level
4.5 IN - Extemnl 4.5 MHz modulated earner input
AUDIO INPUT sWITCH - Selects between an external 4.5 MHz modulated aural carrier and the
lntemally processed aural carrier
AUDIO INPUTS/IF CONTROL- Input connector for the Mono / stereo audio signal and the Exlemal IF
option control logic
In»
em
PREPARATION FOR USE
After installing the unit make the following adjustments:
Output Level - Connect the IF Loop cable from the IF OUTto the [F IN connectors. Connect a suitable RF meter
(Held Strength Meier or Spectrum Analyzer) to the RF OUT and tune to the visual carrier frequency. Adjust the
RF LEVEL control to the desired visual carrier level.
Aural I Visual Carrier Ratio - Tune the level meter to the aural can-ier frequency. then adjust the AURAL LEVEL
control for the desired carrier ratio.
Video Level - lMth a nominal 1v pp video source connected, set the VIDEO MODULATION ADJ so that the
VIDEO OVERMODULATION indicator just comes on. Verify with suitable test equipment or by using a TV. and
checking pidure contrast.
Audio Level - For monaural audio signals. connect the signal to the MONO I RIGHT terminals of the a—pin
terminal strip. Set the AUDIO INPUT switch to the UP position and the AUDIO SEL switch to the MONO position.
Adjust the AUDIO MODULATION ADJ so that the AUDIO OVERMODULATION indicator flashes on the Ioudefl
peaks of the audio program. Monitor for a few minutes to assure the proper setting.
STEREO COMPATBILITY OF THE CAMS-60h MODULATOR
The CAMS-sub is designed to accept either a standard monaural audio signal, a aTsc encoded baseband audio
signal or a 4.5 MHz modulated subcarrier. It can also generate a BTSC encoded stereo signal when Option 5 Is
installed.
If a BTSC encoded haseband signal is used, the internal audio pre-emphasis circuit must be disabled. To do this.
disconnect the unit from power and remove the unit cover. Locate the AN modulator board (the board with the
audio and video controls accessible through the front panel). Next, locate TH1 (behind Audio Level Adj pot) and
put the shorting plug In the DISABLE position (Pins 2 and 3). This disables the audio pro-emphasis. Replace the
unit cover. Connect the baseband stereo signal to the MONO I RIGHT terminals. Set the AUDIO INPUT switch to
the UP position and the AUDIO SEL snitch to STEREO. In the STEREO position the AUDIO
OVERMODULATON indicator is set to come on when deviations exceed s55 KHz (stereo peak deviation). Adjust
the AUDIO MODULATION ADJ so the Indicator just comes on. Monitor for a few minutes to assure proper
setting.
If a 4.5 MHz modulated subcarrier is to be used, set the AUDIO INPUT switch to the 4.5 N position. Neither the
AUDIO MODULATION ADJ nor the AUDIO OVERMODULATION indicator are operational in this mode and no
internal modifications to the modulator are required.
CHANGING TEE OUTPUT FILTER MODULE
Unplug the modulator
Remove the unit cover
Remove the PLL module cover (located next to the RF Output).
Remove the two faceplate screws securing the Output Filter Module (OFM) to the faceplate
Note the connections of the two coax ables to the OFM before removing them '
Remove the screw that secures the OFM L-mounting bracket to the chassis
Remove the OFM
Note the Channel Chart on the new OFM
Set the two sets of DIP switdies, visible through the top of the PLL module, to the channel of the
new OFM
10. Insert the new module, channel label up. and connect the two coax cables, OFM mounting
hardware. PLL module cover and unit cover
11. Before reinstalling the unit in a rack, verify its operation by conceding the RF Out to an appropriate
piece of test equipment. Use caution when connecting the modulator to test equipment because the
output level may exceed 460 dBmV
PPT‘PFPP’N.‘
_____________.________—_____—7,
CAMS-60h with STEREO OPTION
Description:
The CAMS-6m) with the Stereo option (option 5) will convert the lett and right channels from an audio source to the
' “to encoded stereo format used In television transmission. It can also be used for the transmission of standard
Mnaural audio signals avnflable from non-stereo sources.
Input Requirements
Audio Levels
Stereo: 0.7 Vpp to 7 Vpp. typ (-1o dEm to 010 dBm)
Mono: 1 Vpp to 7 Vpp, typ
Video Level: 1 Vpp, typ
Connections:
Connect and make all adjustments for the video, IF loop thru and RF Out as described under Preparation For Use. The
audio input signal may be balanced or unbalanced. it an unbalanced input is used, the unused terminal must be
grounded via a short jumperto an adjacent ground terminal. Stereo Input connections are made to the corresponding left
and right terminals as indicated on the rear panel. A monaural input signal is connected to the right channel Input with the
left channel remaining either open or grounded.
Adjustments:
For stereo operation. the AUDIO SEL switch on the rear panel is set to the STEREO position and the AUDIO
MODULATION ADJ is set fully CW. When the stereo option is present. the Audio modulation is controlled by the
MONO/STEREO MODULATION ADJ. Intematly, the programmable 75 usec audio pro-emphasis must be set to the
“Enable' position. This is the fedory installed setting. It the shorting plug has been moved, it should be repositioned to
connect pins 1 and 2 of TH1 on the AN board.
The AUDIO OVERMODULATION indicator is configured to work in both the stereo and mono modes. When the AUDIO
SEL switch is set to MONO. the LED will light when the deviation exceeds 225 KHz. In the STEREO position the LED will
I" h' when the deviation exceeds s55 KHz (150 KHz program audio and 15 KHz pilot tone). Adjust the MONO/STEREO
.\_ JULATION ADJ so that the over-mod Indicator flashes. Monitor tor a few minutes to assure the proper setting.
For the BTSC STEREO indicator to light there must be an Input video signal and the AUDIO SEL switch must be set to
STEREO.
Specifications
Separation
50Hz-10 KHz 20 dB,Iyp
Frequency Response
50Hz-10KHZ: £1.5¢B,Cyp
Harmonic Distortion
Q1 KHZ 0.5 56. typ
FREQUENCY OFFSETS
The table on pages 10. 11 & 12 lists the switch settings for the aandard cable TV and broadcast TV channel
assignments. 0=UP=OFF (as labeled on the switch). The L0 frequency is the sum weighting or the switches in the
UP position. The weighting of the specific switches are provided belovc
Switch Bank 1 Switch Bank 2
Switchtt Weight Switchd Weight switchil Weight Switchii Weight
1 0.8 MHz 6 25.6 MHz 1 VCO BandSwitch 5 50 KHZ
2 1.6 MHz 7 51.2 MHz 2 VCO BandSwiich 6 100 KHz
3 3.2 MHz 8 102.4 MHz 3 12.5 KHz 7 200 KHz
4 6.4 MHz 9 204.8 MHz 4 25.0 KHz B 400 KHz
5 12.8 MHz 10 409.6 MHz
To obtain a +12.5 KHz offset. move Switch Bank 2; Switch# 3 UP. It the switch is already in the UP position. move
Switch Bank 2, Switch# 4 UP and move Switch Bank 2, Switch# 3 DOWN. (This add 25 KHz and subtracts 12.5 KHz.)
_,,o...um —1-u~=nown
1234557591!) 2345678
1_-uu=nown 1—=0N=DOWN
GNNL
1234557591!) 12345575
SWITCH TWO 1- ON = DOWN
CHNL
12345578
H0 VIDEO L0
APPLICATION FOR FCC CERTIFICATION
‘BZSMXIOV
MODULATOR INPUT
10 WATT VHF TRANSLATOR
IIJEMOIINLATORI
WAVEFORM
MON7ITOR
EXH‘ElT 38
VIDEO SET-UP #1
DIRECTIONAL LOAD
POWER
TRANSLATOR METER C°U§LER 4
1 NOTE
1 10
SPECTRUM
VECTO§SCOPE ANALYZER
NOTES AND EQUIPMENT LIST
1. Video Generator — TEKTRONIX 1910 - Serial Number 3010219
2. Power Meter - BIRD MODEL 43 — Serial Number 216291
3. Directional Coupler - CONNECTICUT MICROWAVE #250006
A. Load — DIELECTRIC 5750 - Serial Number 23510
5. Spectrum Analyzer — HEWLETT PACKARD 859115 - Serial Number 3325A01739
6. Demodulator - TEKTRONIX 1450—1 — Serial Number 3020559
7. Waveform Monitor - TEKTRONIX ,17SOR — Serial Number 15022663
8. Vectroscope — TEKTRONIX 178011 — Serial Number 13022663
9. Group Delay Set — TEKTRONIX VM700A - Serial Number 30100433
10. Dipole Antenna Cut to Frequency (For Field Strength Measurement Only)
APPLICATION FOR FCC CERTIFICATION
EZSHXIOV
MODULATOR INPUT
10 WATT VHF TRANSLATOR
B(HIB|T 3b
VlDEO SET-UP # Z
“an" m Meme
ADAPTER MODULATOR TRANSLATOR METER 3
LOAD
OSCXLLgsc-‘OPE DETEérroR
SIGNAL
GENERATOR
SPECTRUM
ANALYZER
NOTES AND EQUIPMENT LIST
1. NTSC Sideband Adapter — TEKTRONIX 1405 — Serial Number 13040665
2. Power Meter - BIRD MODEL A3 — Serial Number 216291
3. Directional Coupler - CONNECTICUT MICROWAVE #250006
4. Load — DIELECTRIC 5750 - Serial Number 2354
5. Spectrum Analyzer — HEWLETT PACKARD 859112 — Serial Number 33251101739
6. Larcan-TTC Active Detector — Serial Number 002
7. Oscilloscope — T'EKTRONIX 2465 — Serial Number 3025622
8. Signal Generator - HEWLETT PACKARD 651A — Serial Number 434—004“
APPLICATION FOR FCC CERTIFICATION
BZSMX1 OV
MODULATOR INPUT
10 WATT VHF TRANSLATOR
EXHIBIT 4a
FREQUENCY DRIFT VS. TEMPERATURE
CAMS-GOD MODULATOR
MEASURED
DEGREES C LO FREQUENCY(HZ) DEVIATION(Hz)
+50 181,250,647 379
+40 181,250,449 181
+30 1 81 I250,205 -63
+25 1 81 250.268 0
+20 181,250,408 140
+10 181,250,600 332
0 181,250,673 405
-10 181,250,605 337
-20 1 61 250,225 40
-30 1 81 249,700 668
PAGE 1
DEVIATION(%)
0.000209
0.000100
0.000035
00000
01000077
0.000183
04000223
0000186
-0.000022
41000813
APPLICATION FOR FCC CERTIFICATION
BZSMXIOV
MODULATOR INPUT
10 WATT VHF TRANSLATOR
EXHIBIT 4b
VARIAC
POWER
SUPPLY
FREQUENCY
COUNTER
" """""""""""""""""" fifiéfiafiflifié 3
CHAMBER ‘
MODULATOR
NOTES AND EQUIPMENT LIST
1. POWER SUPPLY ~ HP8012A - SERIAL NUMBER 2329A-021B1
2. FREQUENCY COUNTER - HP53345 - SERIAL NUMBER 2937A05503
34 THERMOMETER » FLUKE 77IBOT-150U
4. THERMOSTATICALLY CONTROLED TEMPERATURE CHAMBER, ASSOCTATED
THERMOMETER ll
__1
APPLICATION FOR FCC CERTIFICATION
BZ5MX10V
MODULATOR INPUT
10 WATT VHF TRANSLATOR
EXHIBIT 5
AURAL SET-UP
DIREC'flONAL
POWER
MODULATOR TRANSLATOR METER COLT-ER
4 z
E E
I I
E E
AUDIO =
TEST SET <__“___ DEMODGULATOR w“
MODULATION
ANALYZER
NOTES AND EQUIPMENT IJST
1. AUDIO TEST SET » HP339A - SERIAL NUMBER 1730A00691
2. POWER METER - BIRD MODEL 43 - SERIAL NUMBER 216291
34 DIRECTIONAL COUPLER » CONNECTICUT MICROWAVE - PART NUMBER 250006
4. LOAD - DIELECTRIC 5750 - SERIAL NUMBER 2354
5. MODULATTON ANALYZER - HP8901A ~ SERIAL NUMBER 2911A05212
6. DEMODULATOR - TEKTRONIX 1450-1 - SERIAL NUMBER 9020559
EXHIBIT Za
PUBLICATION TSM 20-302
TECHNICAL MANUAL
10 WATT VHF AMPLIFIER
FOR MX10V SERlES
TV TRANSMITTER/TRANSLATOR
LARCAN INC.
228 AMBASSADOR DRIVE
MISSIsSAUGA. ONT ARIO
CANADA LET LIZ
PHONE: (905) 564-9222
FAX: (905) 5644244
Run: November 28, 1998
MX1W suits - 10 Walt VHF AMPLIFIER
Sedan 1185
NOTICES, ETC .....................................
SAFETYAND HEALTH WARNINQ . . .
GENERAL SERVICE INFORMATION
1)PansListsEmIainsd .................................
2) Inupm'ng LARCAN Drawing Numbers ............
3)WLARCANAssenMyPrefixNunbefingSysIem....
4) Ust ufPrefix Numbers far ma 1!) W Tmnsmiuer . .
5)me .........................
INTRODUCTION .............................................
GENERAL DESCRIPTION .....................................
SPECIFICATIONS ............................................
ABOUT THIS ‘MANUAL ..........................
PUBLICATIONS LISTlor MXWV “fies VHF Amplifier:
PUBQB-ZS InsVaIafiOn:
1. Genera mutation ............................
z Gmuufing and Gromd Loops .......
3, Ugmnhg and war Transient Function . .......
4A Pwervwmg ....................
5. Vermaflon and A'r Condlfioning . A
6. Fire Protection .........
7.
8A
9.
mmMm Nm-mberzs.1sss 1
10
10WVHFAmpIfllr
MX10V sedec - 10 was VHF AMPLIHER
Section Tm Pam
PUBSB-31 RF Oulput System: filter and Directional Coupler (Prams 6 a. 7):
1. HB Hemzl Resumer Bandpass finer Description . .
HB LowPuwerBandpassFm-‘Desaipfion . . .
...... 31 -1
. 314!
2 .
3. LB Law Pass & Noich Filer Description . . . . 31-4
4 RF onetime! Coupler Description ................... . 31—5
PUBQGGZ RF PowerAmpiflef (Prefix 2):
1. moduahn and Gamma! Description ........................... 32-1
2 Preamplifier Circuit Board Assembly . .
3. RF Power Ammmef ..............
magma Amner Comm! Board & Meteflng Panel (Pmfix 4):
1. Comm Board 3. Metering Pane! Dwipfion
z Amplifier Comm! Circuit Board Description . .
PUEQS-M Tmmmifim' Output RF Metering DeEdDr Board (Prefix 5L
1. RF Metering 3. A50 Beam Damptbn ......................... 34-1
2. RF Metering Board Test and Calhrafion ........................ 34—2
PUBQG-Ma Pin Anemmor Board (Prefix 9):
1. Pin Amnuainr Board Description ............................. 343-1
2. Pln Attanuumr Bead Setup ............................ .3da- 1
PUB9835 Basichnsmlmr MEMOS:
Gmsml .......................................... 35-1
Transmitter Gaming System ...........
static 1. Equpmem 0: A WsmflcTumrial ..
F5 and Surface Mount Rsplamment .......................... 354
Replacement Parts & Spare Pans Remmndafions ............. 357
T’SMMMO: Numb-tn. 1993 Z 113wa Amplifier
MX1W series - 10 Watt VHFAMPLIFIER
NOTICES, ETC;
THIS EQUIPMENT USES STA'I‘ICaEENSITIVE CHOS INTEGRATED GRCUIT$ Observe pmper handllng
precautions (Indicated In Maintenance Sedans) n all limes when working with his equipment
TOXIC MATERIALS NOTICL "PORT/INT...
Efl'sm've thermal managemlm in certain semicondudor devices in Ihis equiprmnl is possible only through the
use of Beryllium Oxide ceramic materials. This equipment WM devices made wilh Beryllu'n Mae!
BeulflummdlucompoundsmaPOlSONflukenmmbodym-nym
To reduce your risk, "member: In use of accidental breakage «I my kind of semiconductor device,
DO NOT INHALE THE DUST, and AVOID GETTING DUSTIN YOUR MOUTH; it could cumin Beryllium.
DO NOT LET BERYUJUM DUST INTO YOUR BLOOD STREAM THROUGH CUTS OR OPEN WOUNDS II
smmmmsnursmifluimnflon Ifmemmmbodymanymmner.
Avold an: by wearing gloves while pickh'ig up In! pleat. Wash your hands thoroughly m! repladng
devices. Dispos- mmm only through approved lozicwastedbpoul unifies.
Remember too, after cleaning up an accidental breakage, avoid [MlIlll‘Ig the dust while replacing or
emptying vacuum cleaner filter bags. and wash your hands well liter send-ring the vacuum cleaner.
All material in this manual is eopyrighlc LARCAN INC. and reproduaion inwhoie orin panln anyfmrn forany
pm‘possofl'ierlhanemsivemafmsequipmem owner. Mpnorwrlllen aumarizefionfrom LARCAN INC.
Ispmhblted.
deanamsaremepmpenydmeirmspedwemmandmmmdmmemfwdmwn purposes:
mysfinufionismtmeesserflymendcrsememdme manarkorisawner‘ Partslislsmyalso contain
redemeflwdvendormmesasmeidhpmanmamolspa'epm We magnebrwinedvemntanission
duademmadqmnedgemertanymanissimwasoomplmiyaeddemel
Although mafollcmhg pagescenlaln asmudl inlormafionabommeflS—IOB Irensmiflerorlhe TRS1OB
nanshmrmoyarebommesmexeeptformeir emilersNSItis reasonably possibleln prwide, nevenheiess
wenmstslalemtmoeehsuufibnsdonotpwporttoocveraldetalsorvarialionshequlpnmflnorlopmvide
foreverypossibleoonfingencylcbemelinconnewonwithilsinslallaflonmperaliomormaimmance. Ilis
assumedmalMympetemledepemnndvdlbemspombhhrmmnenemeandmpdrofme
equipmenlihalisdesubedinm‘nsmenuel. Shouldmmeriformafionbedesimdmrshouldpenimhrpmbloms
arise whim are not covered aufidenfly herein lorthe purchaser's purposes. or should replacement pans be
required,1hemallershouldberefe|'redmus.
LARCAN INC.
223 Ambassador Drive.
Mississauga. Ontario, Canada L5TzJ2.
Telephone (905)5s4-9222, FAX (965)564—9244.
TSMMMO‘. Navemberi'SJWB 3 ‘IOWW‘IFanifief
MXWV series - 10 Watt VHF AMPLIFIER
TRANSMITTER SAFETY PRECAUTIONS:
AC VDLTAGES USED FOR THE OPERAflON OF THIS EQUIPMQJTAREDANGEROUS TD HUMAN LIFE!
This immwonmnudMsbeenmmenmeemflgiwanmmMnMopaafion.miuename
and service personnel who are aware oil and are familiar with, the hazards of working with high powered
electronic oirouitsl
This manual does not purport to detail all of the safety precautions which should be observed when servicing
this or any other electronic equipment SeMotng by inadequately trained or irreaqoerienoed personnel may
expose sueh personnel to serious risks which oodd result in personal iniu'y or death. and/or damage to this
equipment. All personnel oonoemed with the sen/icing of this equipment should be thoroughly famiier with
standardtts'tald prooeduresforthe hementotetectrlwt bumssnd shock.
The equipment has been designed to protect operating personnel from accidental corner: with voltages
dangerous to human lie, either by means of finance (Mtere “n is necessary to deliberately reach to metre
oontactwlth Ivetenninala)orwtth shielding. Itlsthereforeofprime imporaneethetanyproterfiveoovenng
devioeebekeptinplaoeatalltines.
While all praofiml safety precautions have been adopted to safeguard personnel from possible injury, in times
ofoft-airemergenoythereis often astrongmdencytn ectwitnoutdue regardtornormaloeuficn; forlhis
reason. both supervisory and operating personnel are urged to ENSURE THAT THE SAFETY RULES
DETAILED BELOW ARE FOLLOWED AS AN ESTABLISHED ROUTINE at all flmes
1. IGLLMEACPOWERBEFOREITMLSVOU
Under no cirwmstance should any perscm ream mm the whit-lets for the purpose of servicing or adjusting
the equipment without first disconnedhg the AC power, or mm the immediate presence of emitter person
capable otrenden‘ng aid. Use otthe buddy syaem is enoouragedtortransrnitterwonr.
2. DONOTTAMPERMTHINTERLOCKSORS‘FETYSHIELDS
Undernonnatooumstarteeememyshieldstnudberernnved
l REMOVEPERSONALJEWELRYWHEVWOWGMTHEEW
The 43 volt power supply in this transmitter, although overload protected, is able to deliver wants capable of
heating rnetalllctoots orpersonaiiewelry suehesawatoh band. bracelet, orring. Accidental shortoircuitsl'rom
sudtmefllcobiecgeenmehemhtfiflsdfldemflbmmnhsenwspereonaliiuy.
4. KNOWFIRSTAID.ANDKEPHRSTNDSUPPLBAVNLABLE
mmtedtlsteidhswcfionetortheu—eamtemotdeotrwmodtm bums should be dsplayed ina prominent
Ioiation adjacent to the equ'pment in rendering fist aid. the timeliness and attentiveness ot the treatment are
vitally important to the recovery ot the Iniued person.
Without exception, all personnel should thoroughly familiarize themselves with the procedures involved One
person. whose regula' duties place him or her at the transmitter site atten, should be delegated and given the
complete responsibility and armority to ensure that list aid supplies are kept on site and maintained fresh and
up to date.
Prominentty display a list at emergency telephone numbers. This list should include the telephone numbers of
the nearest ambulance, hospital. doctor, and tire departmem palemedics; and the public works (highways or
county roads) department in use the former persons need eoeess to the site during indement weather.
TSM20-302revt7. Novemberzs, 1999 4 10WVHF Amplifier
MX10V “rm - 10 Walt VHF AMPLIFIER
HEALTH WARNINGS:
1. Non-metallic coverings oi some coaxial cables used in this equipment are FLAMMABLE and may
transmit fire when ignited. Other wire coverings are not capable of suppcrfi'ig combustion. but any
non-metallic covering when heated sufficiently may emit dense smoke and acid gases which an be
highly TOXIC aid often CORROSNE.
2. Be careful when replacing RF power transistors. Thermal transler properties in these devices are
achievable cniyhyiheuseoiaeryllium Oldde ceramics. We stated iteariierbutwewiii emphatically
repeatitegain and again. Beryllium OxidekaTDMCtubsuncc. il'theceramicoremer
encapsulation is opened. crushed. broken or abraded. the Beryiiium Oxide dust an be hazardous if
tnkenintothebcdyhanymanner, Useeaufioninreptau'nglimdevices.
a Solvents such as alcohols. ketanes. aliphatic or aromatic hydrocarbons, halogenated hydrocarbons.
etc. as found in glues, paints, paint thinners. paint removers. aridlcr deani’ig fluids, may emR TOXIC
VAPOURS and some may be FLAMMABLE Reed and undersflnd the drections on their miners.
and ensurethalthey are used onlyinwellvenfiletedlccetions.
GENERAL SERVICE lNFORMATiON
1. Peru rm Layout - EXPLAINED
Parts lies for manuals are cannula-generated out of the LARCAN materials management database. They are
presented in hierarchiai orfemliytreemierexferaa is possible.
The computer is input with the parent parts list number. in his case the empliiier rncdel~4ODz168 which it
designates as level 0. The computer first checks the parent II: for major suressemblies, then each
Mimbrnmsmbfiefl.m.endemngesmosefietsinerderofhelmmy beqinningwitl’rievel
O,then1,menz,ete.thenpnntseadiinmecrderlnwrfid1theyweremn¢ inmesebocldetswhichbgeiher
describeit'lePARTSoHt-ieempilliermr! have usedlhecomputers electronicdataoutpuitoallawrstomcre
easflyinegrmmreie‘valflpeflsiistwflhlheten.
Ti‘eiitecflextirmediatetyabovelheharizcntalheonihefirstpageoi‘eediiisiprovicesmenumberendname
of the relevantassembiywhicl’itheiifirepmsents.
An'R'fcmedbyadasi‘landenumberindlcetes revisionstatus Thistrflonnefionlsmarvngfulmcw
RmeweiPansendIu'Cusu-inerswicepeopie.andmardefthaithesepeopismnbermstnelpmtmeyshnuld
beadeedotmisrevisicnnmnberespedalyH‘renewalpensareneeded.
2. Interpreting LARCAN Drawing Numbers
Engineering drawings at LARCAN are based on the concept that an assembly or subassembly is simply a
GROUP of component parts. thusvmen a G appears on 8 lat. ltmeens an "assembly". Thus a ci'mit board
loaded with parts may be referenced in this manual as 100105561“, while the drawing that shows how this
assembly is ”together wui be “3061055F1”. Here. the P means PART. not PAGE (drawings in the LARCAN
engineering department appear in ‘sheets" to avoid confusion bemoan Parts and Pages), and sometimes
several similar, but cfrfierent "pars" may be shown on the same drawing in order to save space. The cirwil
board drawing cited above is an example.
TSMWMOZ Navembet26,1998 5 tquHFanlilIsf
ux1ov series - 10 Watt VHF mpunen
GENERAL same: Newman
1 lnhrprfiinn LARcAN Drawing Nun-bus (continued).
Therearetwomodelsofthispaillcjardrmitboardmichhappensmbefl'ieoumutRFdrwitboerdoflhelow
bend(Bendl)powera'npiller. meannellreqrencymngedetenfineemmwrfialargmupofmgsembly
it needed. NTSC channelszmnoughhequreagmup 1.whie dismissandsrequire the group2board
assembly. Theseboand assemblies differln nfinorways. butcanoeshownasaslngle illustrationwilhthemo
‘parts'defitedbyamteconveylngessenfiaflyfltemanhgof'Pantasslm Paaniacecopperstrap
pmpersforcfnmelssanda'
Other assemblies. such as in recent models of beads used for group delay correction In the exciter. may be
shown as a number of separate assemblies (Parts 1, 2. 3, 4, or 5)‘ on several sheets of a single drawing. The
drawing "parts" all areassembledthesameway, mtvary in quanlilyand type ofecmponents.
For vendor components such as resistors and capacitors often a generic drawing describing basic
specifications. but having many "parts“. will be used.
As an example. Drawing 3R152 Resistor. composition. 7: watt. Drawing 3R152 describes a V. W resistor, but
the drawing PART numbercalle forms value and toleranceo'me resistarwanled. Theflrsttwo cfigits aflerlhe
"P' are the first two significant figures 01 me resistance, the third digit is the number of renewing zeroes in the
resistance value. and a J is 5% tolerance. or K is 1096 tolerance. Some example pen numbers are: 47 Q.
t10%. ‘/aW. ls ‘3R152P470K‘; and “3R152P243J‘ specifies 24 kfl, t5%. '/4W. For resistanm values between
1 Q and 10 Q, a letter "R" will appear in the pan number to incl-ate the decimal place: for instance a 5.6 at
556. %W resistnrwill be designated as ”3R152P5R6J".
Often the letter "R‘ appears on smematics or in pans listswhere ltspecil'les lhe decimal placewhen referring
toresistances,sumas'51R"or'75R'or'5R6‘.end sometlmesiheletter'k'vdllappearin thesamecontext,
suchasfila“. Thlspractioeisdeplcreduryold—tirrws in ourmldstmc anendedNWAmcncen tech schools
and membmleamedabommmponemvemamamspedudmmmwecfdedmalmtaflon.but
schemaficsdramfiswayuecommnhcflterpaflsofmewond. hamlwtmeover.aanolowedby
adashandanumber'mlmtesarevlslon,bi.nyoumlbeabletomcogmzettudmrencefiommelayom
framewonroflheist
3. The LARCAN Assemhly Prefix Nunberlng System _
Because a transmitterisa complex device. a referendng system formlqua identlmuonofcomponem pans
MNMMMMMMMMMMMWsMMMhemmm
Eetmmimmefirstcepadorisdeslgnatedm andmefirstresistoi'ialilrewisedasignatcde,hutmenseveml
assemblies using capadtorsorresistors appeaflogelher. mamtir'Bquesflon ihenbecomes “which C1 orR1
arewetalldngaboul’?‘
The LARCAN prefixing system, and its "mtdowmented feamres" represent a beginning and evolving solution
in some or these problems. It begins by assigning a disfina assembly prefix numberto each subassambty.
Prefix 2 (“amplifier-itself) hastwo unique subasserribfieswmdlemmrmarpreflxed 2A1ano2A2. both at
which could haveac1. en R1. etc, Identification preach oorrponentinmll, is done by simply adding theprefix
numberto the cornponem designator. thus 2!“ C1 . 2A2L3. em
Prefix designation is gram (or written comrrmimtlons such as letter or PM butt-mm talking about it during a
phonaconversailon, it isprobablymomnaturalto simplysay"C1 in the preamp board‘or"R7in the output
amplifier“ than in go through the rwfine of looking up the prefix numberi
TSMMVEVO: Novemfir 1998 G 1chHFAmplfl|ar
MX10V led“ - 10 W111 VHF AMPLIFIER
GENERALSERWCEINFORMATION
4. unamcmbly ma
1 - amigcooling FanandTu-minfll Blocks
2 - RF vaeanpfifief'fi Heatslnk Assemuy
2M RFPmampfifier
2A2 RFAmplmer
3- PWSupply(+48Vdc)
4- CommandAGCCMBoflrd
5 - RF mama MemerlngCiu-fil Board
e- RF Output Bandpass FM
7- RFOlmleredienal mist
8- camdpoaarsmplymzva)
9- Pinmsmator
5. Pmdudhflclung‘s
Fromfimemfime,ilmaybeeomenecessarymmasbemadeinmeequipnmfidesuibedinttfismanual.
Such changes ans usuany made either to provide impmvad peflmmanea, or to accommodate eompomnt
subsfimflonsnecsssimdbyvendor profit-lot availability. Anevision letter or number may followmemcdd or
mmmbermfledonhmmp‘a‘b.chassis.«MMMmmepansfisuwhemflisan'R'follawed
byadashsndamnm. wnemveramvisbnleflzrormnmerqypmmsmuldbequobdmany
conespondmeeormmmieefimwaflfingmsquwent '
TSMMrevm Newman. 1998 7 1DWVHFAanfinr
MX1W series - 10 Watt VHF AMPLIFIER
GENERAL DESCRIPTION
INTRODUCTION
This mama describes the LARCAN 10 watt VHF amplifier designed for NTSC channels 2 Waugh 13. Models
4002168613 forchannels 7 though 13. 400216862 for manuals 2, 3, and 4. and model 400215863 is for
channels 5 and e These amplifiers are used in the LARCAN-Tl'c uxmv series transmitters and translators.
LARCAN ail—sottd-state 10 W VHF amplifierm designed to operate conservatively at 10 W peak syncv‘nuet
RF powerand1Waverege aural singtecen'lerRFpuwer. withsuperbpert'pnnance. reliability andoperating
economy. This amplifier accepts an on-dtemel Intemally «fiplexed (In a 1&1 mic via to our) composite driv'ng
signal ofabouHmeeakvisual RFJs'nputtnltsRthain.
The 10 W amplifier and channel processor chassls' are designed to fit in a single 19“ customer-provided
cabinet radt, and require 7" (4RU) of vertical panel space for a complete transmitter or translator system.
Altematively. a 19" customerprwided tabletop cabinet could be sibsfihfied itthe site requies it.
The RF amplifier heatslnk has its own integral cooling fan. and other eubessemblies are convection cooled.
flies’nplkfltyotdestgnfliedeplcymotali modulerand ctt'iersubassembliee. endtheuseaf standardreediiy
mflable mmm, also enhances serviceabriity.
Peek toward and reflected power are displayed on an analog percent power meter lowed on the front panel
of the unit.
AMPLIFIER CHAIN
The internally diptexed composite RF output of the channel processor is led to a conservatively designed
broadbandsolid-stateemplifier. Thisemplifierrequiresnomnhgoradjustment. Simplicityotoperation. reduced
rmintenancecostsandkueesedrefiabifityareafewofmemaiorbenefitsdenvedfipmmisempifier.
The amplifier chain consists of two stages at amplification for low band and thee stages for high band.
Foranplillers having somewhat more gain than usual. and espec‘dlytor 10 watt output applications. the another
driving the preamplifier may be padded down with an inline attenuator to avoid overdrive lo the preamplfller.
bemseexo'oersgeneialtypenonn bemerathlgheroutmtlevels
The preamplifier uses iigh gain, broadband, integrated cirwit amplifiers) operating dass A. This preamplifier
has two stages in high band models, while a single stage suifioes for low band
The preampifierusesthesamecircuitboardMisaniMegralpenofthe‘phesequadiamrocontmr'matisa
iewiedpenotperalleledemplifierconfigwefions. mtowuansduerusesefingbRFchatn. consequently
quadiahnphasingisnotneedednorusedbutsomelowcostcemponentstorltmayremaininpleceonlt'ie
board. Remaientaistargreateroverefiemenselhansknplyleevingthanin place.
The FA stage consists ofa palrofpush—pull FETs in a single use, operafing in dassABasa linear amplifier.
Thisampllfier‘eepasteot'more than sowattsRFoutputwhendriven bythepreamplifierhthepresem system.
butusestheidentiealduaiFETdeviceMisusedinhighcrpowered LARCANhansmthers.
The Sound/Aurel signal ofthe transmitter is internally diplexed and corrected at lF with the visuaINisicn signal
within the exciter, and is amplified in common with the visual/vision signal in the amplifier chain. Internal
diplexhg otters the distinct advantage of lower cost
The amplifier W is fed mph the bandpass filter and the directional coupler, which provides a small sample
of forward and reflected output powerfor AGO and VSWR supervisory funqiohs. The transmitter output then
passes to the antenna system.
TS“ mum-eve; NoveerGJBDS 8 IUWVHFAHINIfief
HM
uxlov mm - 10 Want VHF AMPLIFIER '
GENERAL DESCRIPTION
TRANSMITTER CONTROL
V The control cirwitry in lhis solid slzlelransmiflefls simplc. lnlerloddng inme 10 Wsimplycnnsidsul'jwnpers
(marked EXT1 and EXTZ) but (menial pelnh panel link swilnfles. or RF switching andliary col-mus. can be
connects! if desired. This lm: pomr level gemlly needs no intoxicating.
lnme10W.MmmMissOsimplefiustasinglemnfl’lateimfmmdfl oriuanbeusut The
coolingfanforlhePAl-muirklswireda mepomprplymmmemmwmopememefme
wpplyisawglzfld. AmmispmvidedhmPAheaBlnkwopmmmflodldfihmldmuM
mmaflnqwfilfimoewn
On site it is necessary in ensure mat AC trains voltage within t10% cl nnminal is available, apedflfly in sites
weramvouageunoflenbeemBmelyvarlabls.arid/orhiwesnrewmmon. ltisagoodideatoiogall
voltagoexwrwnslnmmwerapefiodoflimejndmeflspedlyawimblevollagemgdm.
The amplifiers 48Vdc l'near power apply (power-one“ type HDda-G-A) is rated for 3A and is designed for
operalinn from AC panama vollage valiafion ef¢10%.-13%. The amplifier was less man 240 VA
fliecomrol's lzvmmmwpplylsmwdfurOSAandispmeduponapplicefiondACiflnlheuniL
TSMMr-vo: moans. 1996 9 10WVHF Muffler
MX1W “do: - 10 Witt VHF AMPLIHER
GENERAL DESCRIPTION
ELECTRICAL AND MECHANICAL SPECIFICA‘HONS
VlSUAL-DOCIFOC (NTSC‘)
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TSMZOJOQMO:Nwemher28.1m 10 10WVHFAmp|ifief
MX1DV “He! - 10 Watt VHF AMFUFlER
GENERAL DESCRlPTION
ABOUT THIS MANUAL
ltwillbeobservedihetlt'ismanual mnsistsnleeottectienefseparetepublieafions, eadt omofwhiehdescribes
is om module Ursadiofl of the equlpment. Parts lies, appllwbte alignment instructions, and Illustrations whim
generally consist or assembly diagrams and schematic, are Inducted in eedi of these booklets, which are
identified by e l“PUB" number and revision.
These ntinl-pmt‘reetions represent our attempt to assure quality of our dowmentation and at the same time
mammmmrhlasumntaspossble. lnmeuwellergenmnrflorhmdbooked'tenqemedetoasingle
mmigmrequireasentenoe oreven several paragraphsbeeddedmimtherewltthetellteiatptlnwinqme
diangewili shilL consequently requiring renumbering of all pages and subsequent reprinting. These operations
mammaesi'abledelaybemeenmereleaseoflherevisiontotheeqrjpmemandtherusweofltsmamel.
despite our extensive use at cnmptnere It Is our hope that this repmliwtirm delay will be reduced because
revisionsareheertyalwaysdoneononemeduleatetimejnoatewpegeswfinenttounemoduteere
obviouslysimplerto revise and reprintthenthe menypeges ofahandboolr.
Each sectim ormoduleafthe equipment is described in it own booklet. For each booklet. thetomtet generally
consists at a block diagram where applicable, then the relevant Mentions. then the circuits are described.
then Migrment procedures are defined. and then the parts tist is presented. Finally. the Figures (Illustration
drewingsln11"x17" size) comptetethebooklet.
The Parts Lists in all booklets have been compiled by. and then extrema from, the LARCAN materials
managernertteumputersystem,and arewnentasot‘thedeteolisweofthebooldet.
We have attempted to present our drum descriptions in sudi a way that they would be meerfirgful to the
competent teetflctan whose main objective is to look after the equipment We have therefore minimized the
nudiofthe information from such soupes.a|thot.rgh meenirtgtultethe EE. mnbetooheavyend overdone for
mebeleegmmdtedmidenvmoisoespemdyhymgtopmemnmtbedtmmm.
341mblndemat'eusedforLARCANmanualsaeemytowmstomersbefiusees-rlngbhderenebles
eesemblydrawings end/or equipment summations betempoterity ens-acted and medinemofe convenient
pleoewhen necessary. (Before theirjoining LARCAN. several ofourstall’tedtnieel peoplewere previously
broadcast station engineering technicians. whose astom was to temporarily tape their serverne‘flts to the
mariner-phat dooreforconvenient mietencemenwendng insidelheequiwnent).
Dramtgsvmoeemribersbeginvrlmaoc,3tc.400,410t50Eor51Eniayhavabee1-trsdueedlnsizeereven
splitintoseveralsheetstplltmtomebootdefst1'x17“fonnet$houldenyredueeddrawingsaspresemedin
eurrrmlsbefuwdtllwlttnreedJutlsizeengineedngbluepnntsmavaihhteetmdramehysimply
writinmemgorFAX-rgourCustnnnrseMeedepammtmquuesfingmeruemneddmvfingandrwfim
“med.
LARCAN NC.
228 Ambassador Drive,
Mississauga. Ontario, Canada L5l' 2J2
Phone (90565449222; FAX (905)~564—9244.
TsuzomMe; Novemberzs‘ 1998 11 1owvrtr=~nptmcr
“1011 um - 10 Witt VHF AMPUFIER
GENERAL DESCRlPTKJN
Team-em Mommas! 12 10WVHFAmp|mer
VHF AMPLIF‘ER lNSTAu-Aflofl
cm:
Part Topic Pan-
1.
2.
3.
4.
5.
6.
7. Unpaddng A . ‘ .
8. Tums-must Exismd lmemd Comedians A
Q On Sim: Flm Tune starkly: ................................................ 29-13
List of Figural:
Fla m: Drawing mu
1 Transmmf |menock 001mm .................................... text. pg 29-12
2 Application Diem: Transmitter emu-Hing Prlm'xles
3 Applwuon Diagram: Tower and Bunting Gaming
Posse-29mm: mamas 294 vrrmmfiarmnuflcn
VHF AMPLIHER INSTALLATION
Fuses-29mm Dan 12. 1m 2941 w; Ampimerlnmllamn
VHF AMPLIFIER menu/men
IMPORTANT: lt'you haven‘t dready done so. please take the time to read. study. and understand your Beater
manual, and all sections of this manual. You may tlnd overlooked items that may be significant to your
mstaltation planning orto the wt wofkto be done.
1. GENERAL INFORMA‘HON
The economics of manufadurlng a transmitter dictates that much of the installation inromiation in ita manual
must be non-specific to any particular site Although most at the tollowing material, which we are presenting
as "technical interest” information, is pertinent to higher pcht‘Bd transmitter-e some of it is geneialiy applicable
to toNpouered equipment aawell. We hope that one or more at these suggestions contained herein wflt prove
helpful to you and provide wortmvhlte dialtenge to your imagination and technical ability.
One of the keys to a smeasdul installation is meticulous piann‘ng and adequate alowanoee fortask tiniest
Allow suffic‘ent time to consider and plan all aspects of the installation including the bidding. whether new or
existing. then allow for realistic time spans for the building construction or renovation. equipment rrarlsponation
and installation, and llnal commissioning. A low powered transmitter naturally will require a very short time span
for these activities. whie high powered equipment could require many mornha Should you feel apprehensive
about planning an instalation, firmly phone or FAX our Appficetions Engineering Manageer is available mo
able to guide you. Your consulting engineer is also a good source of information Both these persons would
be familiar with tediniwl aSpeots of the proposed installation
Applications Engineering support uttered by LARCAN includes technical irtfonnation. recornnlendaiions on
vendor products when requested. and advice on pvuied task considerations and time span estimation. This
Although general application intonnation (Figures 2 and 3) was included in this manual. it is impomnt that
specificsystemlayoutabeprepared. andthatlocatiensoftzabhetaandRFequipmentsudtasRF patchingor
suibhing equlpment. are determined togetherwith the routing of the transmission line. AC power (Mains) feeds
and other wirlng. grounding (earthlng), and ventflatlon air ducting. Lightning protedion should be considered
eadyhmpmmi'qprowssmeoeuseagwdwfldinghyomunefiersignmambemfil
We mention "cabinet!" throughom this document. although the Trsme and T'TSSOB transmitters were
designed as single chassis for rack mounting in a standard 19‘ cabinet to be supplied by the wsmmer. This
assumption was based on the antidpated marketior the transmitter being for star-thy or unattended isolated
sitelowlbhsandthateabiteheckspaoeotabotkfl'zfi‘woutdbeavaitableformountingtheamplifierand
excitef ortranahtnr. The cabinet ventilation openings should be titted with airman. to help the transmitter
components remeindean. Alternatively, atabletopstyleofcabinetmnbewedmadltrequired
Duemidefidonrmstbegiven toventiaflon,espreperooofimensuresmebngestequlpmemlitem. Basic
oootinginionnationisprovidedinfolwtharlS. buttlahigherpoweradtmnsmitterisalsoonsitemabeieve
mattheimponanoeofthe subject maywanantandiustflymenlreofenemeriencadairconditloning contrador.
Ensu'ethatmftldentspeoeis available bomtntrontand rearotalt cabirietsandotttereqtjpmentto permiteasy
access whfle equipment is being moved ammo. and to enhance awesstbllity for We maintenance. A
Mnumeom 100om(about3 to Still) otdearanoe is recommended to allow amesstora tecmioian and test
emipmem. but you may need more clearance for other reasons offer the lifting devices sometimes used during
installations You may wish to consult local equipment rental agenciesvtor dimenslons ofthelr avalable lilting
appemms;memqukeddeaianoeisoneefflie'planning”hemsmbemneidered.
All cabinets should be level. An uneven ltoor surface can elated the sheet metal frames at many cabinets so
that door latches will not operate properly.
PUBSsze rev ct, nee. 12 1998 29-1 VHF Amplifier imitation
VHF AMPLIFIER iNSTALLATiON
2. GROUNDINGIEARTHING
Please overlook our typically North American use of the word "grounding" throughout this text to describe a
connection to earth, and the were "ground" which usually refers to a point olzero voltage. ie. the oath. We are
certain. however, that the identical mearings or derivations of the word "ground“ with those words pertinent to
“earth” as universally understood by all broadcasters. That said. we shall proceed.
For safety. it is important that grounding conductors of adequate size be used to connect the transmitter (and
other) moms) to the station ‘teohniml ground“ point The menu build-read plate through which all circuits and
ooaxl‘neslnandlromthetowerwlllms, makesan excelemlscmiculgromdbewrseltwlllbeoonneded
with oneortwo, 150 mmwldex 1.5 mm thick, oopperstrapsto homer-ground system.
Frgures 2 and 3 suggest one method, in which copper bar 75 or 100 mm wide and the same thickness as the
“cattle is laid mdero'ansmitter and other unmet: for grounding. Each cabinet rock or tabletop cabinet is then
connected with 1.5 mm copperstrap orautomotrve starterceble to the copper-ground bar. The copper barin
mmctstothematslbutlmead plate. Altematively. mpperstrapmn oelaidinagroundedovemeadcable
ltey. indoor grounding conducmm must ultimately connect to the bulldlead plate.
Consultyoureledrlmi codebook, oraskyoweleclriwl collimator-ammo minimumpemtissible ground
conductor size. but for broadcast “rrstalations a m ground impedance is desirable, so generally the cross
section preachmblnotgroundshowdoemesemeorlagerlhanmetotalotitsACwinnga'osssecfion.
Anomoorgrmcomedimsstmldbewellbondeduslnganexomennicbmzing processsudt as Cameld'“
or equ'valem. Spatial precaufions shodd be taken to mini'rrize comsion where connedions are made of
disslmlhrmetais. lndoormnnedions can be brazed, saver soldered, orsimply bolted together and then tin-lead
soldered in the conventional manner. When indoors. don‘t iomet that the steelwork. the ventilation system, and
an other metdlio objects in the building, should also be grounded
ltr‘s mandatory lhatagood low impedance earth groundbeprovidedforthetower. and iris good praoficeto
employmisrowerground torall station ground connections Asystemotouned radial oonmraonasshwnin
Figures.mmgmmmmmmmmwyanmonmmrummmm
severalgroundmdsspamdsmmcsmeirbngmapmwmvenmmmtertableficonsiduedwbe
agoodground. TriesuelrebarsandJ-bolts In footings should alsobebondedtothis ground system Be
careful ofrflssr‘mflarmetals, end don't/Maze anythingtoma towerlegsl Use muses steel worm gearstyle
hosedampstodampooppersu-aporcoppervdrestometowermenbers Aspeo‘aloonmdivegreaseie
eveieble to avoid dissimrlar metals intrusion. but frequent inspection is necessary.
More heroic measuresbeoome neoessaryltthe towertlooling is lowladon solid bare rock. These measures
would ir'nide setting the gromding radiate in poured concerns (which has surprising” good conduuivity), doping
with conduoivity-emandng menial salts sud: as megnesiun sulphate (Epsom salts are supposed to be less
envionmentalyhanntulmanolhers). and whgspecialholwgroundrodsthatare intendedtobednveninto
holes driledintherock. mmansaidtobommenficaltytommckandpmvldaexcenamgomdmg, as
long as they are kept filed with water or mental solution 'ULTRA GROUND" rods are available through
LARCAN crfrom our trainees afliliate LeBlmc at Royle Teloom lnr.
The building layout should place the lower. its wiring. transmission line. the AC panels and surge suppressor.
and the teIEphone terminations. all near one mother so that all ground connectons are as short as possflsle;
all I'ldooreqrdpmemshould begroundedtotheseme ‘leohnlw ground'whld'rwe suggestsnould bathe
Mm,whimfiflbewmeagoodhflhpedamemmmdvmenomnmedmswemi 150m copper
straps to the romeo This single technial ground will provide the basis for lightning protedlon or all equipment
in the building. Both the power company and the telephone company should also use this same technical
ground, otherwise a Eghtning hit to the tower could easily induce damaging omelents that back up through the
equipment and out the power or phone line to its own ground comedions. Sumo suppressors for coax lines
and othertower clrmlts can mount (and ground) on the bulkhead plate.
Fuses-29 revo: Dec 11 1993 29-2 VHF Amplifier triathlon
VHF AMPLIFIER INSTALLA‘HON
Many installations In large cities make use of existing tall buildings or specifidelly dedlmted shudures (such as
the CN Tower in Toronto, Canada). and groundlng for these instalafions could present a slight diellenge.
Most tall sum-hires are provlded wlth wide copper mpe mnning from top to base. and grounded at or under
the building foundations. The amount steel ls also grounded in the same point. The challenge down when
tre 3mm susialns a lightninghit. because an anon-nous voltage gradientw'il he presentfrom top to bottom.
Equipmerdgromtfingmuslbedone loonepointomy, esexpleinedinme mnseaien.
Although most audio and video signals around the transmitter plant are of relatively high levels, it is well to be
awareofemlmrpleeraepectmshouldbe eddusedanyway. this isthe posslbiltty ofhadverlentcreation
ofoneormre'goundloops‘otmeldndmetcanindueemmir'inlowlevelalniociwm.
the most common cause of the hum-inducing kind of "ground loop" is a result of oodeapproved electrlcel went
in which all wiring is placed inslde metellle oonduit or raceway, end the conduit is attadied to. and in cement
with. the grounded shim-Ital steelmrkol‘me bulding.
Here is what can happen: 1. The transmitter animals are grounded; 2A The electrical servloe panels are
grounded; 3. The conduit or raceway additionally may be grounded through its fasteners to the strumml steel:
4.1heservioepanelismnnededhylhe metalicpemmroughacmdukorrecewayto lt'tetransmittercabhet
The result is meormore large areasingtemmloopslhsthaveACrnduced inthern duetoihewiring lnlhe
condu‘n between can induce signifies“ hum laments into low level audio wiring.
This grmmdlng treatment is lamentable to most regulatory armoritles in North Amerie and pumps elsewhere
as well. provided that the equipment in that is grounded through the copper gmtmd conductors, the bulkhead
planandsofinowergmmd. Notelhalhis methoddeesreqrireinstallationdeseperete dedimted gmund'ltg
wire Inside eed'i conduittorlheconnedlonofmeuomedground wntaddeadlmoepfldfiwhemr
receptacles ere used. lt is assumed that isolated ground receptades are available, usually foruse in 01me
ltmaybemcessarymatywand wurmmewmmmmimmsmmm
reassuremmmpemrmmmdgmmpsdoesnmmhdconmmmappflflile
codes. Atlhevetyleestyouwllprobeblyneedmprovematallyoureqmprnemehoeedgrounded.despltsm
mn~metaltic oohnectlenotconduit ormceimay,
meaninetslnvmmhtheymamt. LARCANexcltervideohputsuseamflerenfialconnedionenderemt
gmunded, so do not contribute to a coaxial able ground loop. The transmission line, however, B grounded at
the tower, at the bulkhead. end at the transmitter.
Treatmemotcoax cableground loops usually consiss ofcoaxlel cable dress in such a mennerastominimize
the area presented by the loop Lowering the fine bridge pemen the bullding end lewerwill indeed reduce the
mm!
the energy induced on the center condmmrdue to a directlightra'ng hittomewer. 100 to130 cm (341!)
MSG-29 revo: Dec. 12, 1998 293 VHF Amplifier Installation
VNFAHPUFIER INSTALLATION
2. GROUNDINGIEARTHING (mo).
The Canadian Broadcasting Corporation, through its Engineering Headquarters group. maintains its own
standards for equipment design and installation and has pubflshed many of these for the infatuation of its
“pliers. The CBC spodfioetion ”Town/eel PowerDisfiihun‘on and Grounding Standards. ESS-Tz4'and CBC
drawing 45753 whid'i indimtes the groundng practices lbllomd in its itsiahims. are highly recommended.
Upon request. LARCAN an provide you with a copy of these CBC documents.
Although wetryto avoid muting any petioutarvendororprodud. we have nohesihion in also reoornmemflng
M0 publications from [he PolyPhaser Carp, phone 18004257170 or (warm-3511. FAX (film-7824476.
In Canada. meirrep is smcutss lNC, tat (smear-0624, FAX (905)-727-0861.
One it The GROUNDS bbehmlng andEMPPmtaoa‘on. Second m'by Roger R. Blodc this ten
published by Poinhaseris well worth the small price askei mating/EMF and Groundhg Solutions' is the
orient PolyPhaser atatog of Mg materials and lightning sage suppression devices. The fitalog is free.
Both of hose publications are recommended reading for anyone planning a ground system.
3. LIGHTNING AND OTHER TRANSIENT PROTECTION - a tutorial:
Alameproponlon ofmefottowing informationwhioh is offered abmlighmmg, westekeniroma booklet snfitied
'LIGH17llING PROTECTION ierADIO TRANSMITTER STATIONS" pubishsd "n 1985 by NAUTEL. whim is
e caneflan manufaoturerofAM imsrnitt‘ng equipment olherimonnaion came from the PolyPhaseroeteiog
andtromihei'textlaook Tie GROUNDSforLin'ring & EMFProwdion, Secondatr'lion'midt we recommend
tighly as worth is modest purchase price foranyone planning a ground system.
WewoddlineiomankthepeopiestbomNAUTELendPolyPhasenandweherebygtatemnyedmowledgemeir
mnfi'lbuionslomemoffi'sart
The mmndmmmwnmmmmmkmmmmmmmsmaymem
mm.wwer,endpoweflinesfihee flteaoiJaIir-toidmveneswidelywimgeograpriclooeionend
lsalsoaflededhylooelbpogaphtheheightofmemet‘.androutingofihehooningpowerendtelephme
lines. Unlesspremutionarystepsaretaken,sidistrikesoowdaueetrxnsnitterdarnagemarfimlanytothe
malemplifiersandtotheACinereotltiersassodatedvdmthem.
OtrnnjorzeeofoonoerniswlthmansitkemusedbydisohergeoimergynomaneleMohargod
doudtogmmd
Moaetedrioelstumserelofilzedjhortinemm, endt‘ausedbyloafizedairheaingandoonvecion. Mess
oommonbutmoretroubtesometypeofstonnishefrontaltypecaussdbymameetingoi’wannmoistand
odd-fiyeinfisusmfltguptosevemlmwedmiee Theweatherotlloepeopleintheu.S.andCanada.
Newmamflstmmsmhdwmhmmmmmmamudmmdmmmg
lmndemormxmeseemshownesoontouswhiohinNomArnefifivdltvarytromc=1fornormamCmada.
eilthewaytnc=100foroemfit Florida (hequetorielregionswormidefisevenhigher. Insomeponsol
Afiia.C=150,andInSotmtAmerimintheAmazonbesin.C=2tD). Theaveragenumberoflghmlngstrikes
per-squaremneperyesrmybeoemmdmmmbymumwngmeCnmnbernyoel For
localized convection mmderstorrns,thestrilteinoidenoeisabout 75% ofthet'rontalstonnitddencememaps
duetomorelrequentdoud—todouddisdiergeooourenoes.
Agrotrtded(mm)strmeof‘ifteetheightisoonsideredbysameatmrornlesmessenialiyooverenarea
onnH’sqxareieeua redusappron‘matelyheefimes its height). andstrike inddemewimin matarea eta site
where frontal storms predominate, will be approidmately C x 0.375 H’ x 10"
Pueeue m 0: Der: rz, 1993 29-4 VHF Amplifier lnnallaion
VHF AMPLIFIER INSTALLATION
ThefuregoingleedsustlospeuilatematasmfootmwerlnaermalFlendamr‘nsawivalanthanotherragmn),
In contour 100 and with trunlal stems. wil be stmek an aveer of 9.4 times a year. and for the Canadian
pfiheslneonlourZOwitnsmmerfimeccmadonstonm.a5001wtmwarwouldraeaiveenaverageof1.4
titsperyeer. More important. Me'lightning Maness’ofma mdependsonme SQUAREc/fitsneigm.
nmemarissimatedontepafarfilermwnain.H'wflbeinaeaeedbylflehfllormwmainheightam
bmnesepmmialelysqiivalemtnmaemanna EHAAT. In practice. dimension H'isefignily higher-mantis
antannaelevatlon,bemuseametalfigtmhgmdwilbemstanedforpmtaaimofmempmstsnaDeor
incandescent beacon. whim is usually located shew/e the antenna.
Ammuginswmalofilbnizamdmmsphnfilada'stapleade'vmldljlmpsatavelodty
abom150flper1psmamermavery49-50ps. lteanbesssumedmatduingeecndormanwmintarval,
this leaderbuildsupilsvoltageteizuseiorizatbnformenen150m andlhenfindsltsnenstepmilnln an
imaginary hemisphereofisoltradlus.
Sinceitisposmlatadtnbewilhinahenfisphemmesuapbadergeomenyeenbestmmatahomnmlmm
uammmmymererighermanm150npnhtaboveaveragatenain,soside mounted panelorSTL
microwave armmas can be just as vulnerable as top mounted slotorlurnstlle designs. Form-lately. the STL
anhflnaisollaflflanked by metallicguywiras. musnas sunwwtbsflsfpmtafiim. bulguyslhat happentn
be located in Molina panels oftl'iemelnantennaaraumanyfibemlasstaavoid distortion olthoradlatlon
pattern
Imagine a large ball son 1: in diameter. rolling amund in all directions; whereverltloudies a grounded object.
can become a point ofattammentfora lightning hit. (From this, weeen infermetcoaflal "wounding klts' will
berequlredatleastatme1501tpointonthetzmar,atmemmervalsabovemandnmdefinllalyatbom
the baseofihe towerandtha bum-teed plate'n thebuilding wall).
The return (main) stroke cf a lightning strike is characterized by a rapid rise and nearly mammal decay of
current essentially frame high impedance some mprieed ofa long length etionized air. Presumably, the
‘ndudsnce ofthls ai'pamdatanfineemerateofnseofme 0-1!er anditiea‘rpatnrsslstame detennlnesthe
mummueandilxdeceyrata.
Obviouslytnewrentpeakvalmwillvaryfrwnwikawsmhe.andstatistiaalpmbahilitybasedonernpirieeldah
hmarrrafienvmie(50%otafligming mmfteooomzomc anparasmhilelhe pulsedecaylengih
inhalfiispeekmiplmdealsohasepmbabilyd’smhumnmgefiom10psta100ps,wflhamedianvalueof
4D us. Thereisalseempmbabifitymmepealtwmunmm.oo0mps,anda1%prubabflitylhat
ofmeomaroffvps.
Theliglmlngstrfltewmistsofadlsdiargefimnadmgeddoudintomaam-hflmmkMiseafled
‘gmund‘ur‘eanh". Unfortunately, at the surfacaofnur planetan ideal tarmhal eonmctlngtolheideal gound
(aarlh)isrerelylleveravaidale; practitalteminalswillmnnedtn ltviaaiinite impedance having both
resistancemdlndudance,renghgfremafewomisloafewhmdredomne
This impliesmnannnpedaneeof, say. 100mmmidealgmundlswtiatyouMVa,menmaver-ags
figmnglitalzonooanpswllldellverzmkvmme10enms,enditisomiousthattnismustbeprwampedsteei tings.ehdcompereitwithlhe
measured inducteme of a finite toroid.
Don't forget that ALL conductors and their sheathing or shielding enmdfng up the tower are "incoming" for a
lightning strike; they need suppressors and inductances. The outer conductor of every coaxial cable or
transmission line. or the metallic sheath of mineral insulated or other multiconduder cable should be bonded
(grounded) tn the tower attrequent intervals to reduce probabilly ct jacket puma from the voltage gradients
that could be developed bemoan the cable and the tower, and these "wists and sheeths‘ definitely must be
grounded to the tower base and to the building wait bulkhead plate. Rigid line is usually bonded to the tower
with antdieistraporamemngerphoedevewtewflmgesnfiumlhsmedceblesheemmgisbondedmm
metallic fasteners. and plastic insulated cables must also have a mefllir: sheath
Fleadbleinorsleefiedjadmdfiblelsslrippedofabom1"io1‘1§"ofisjadcelatfrequem(80~50fl) intervals.
aground strapiscomededtothembleouterconductor,thenespecialpolymermpeisusedtoresealand
waterprooftheiacket. Gmtdhgldtsoentsinallmemaenalsrequired.
Broadcastamennasareimallygroundedtometower. socreatefewproblems. Othermtennas. suchasmme
designs used for two—way radio, may connect tiredy to the center conductors of their nobles and are insulated
transient suppressors having good energy ratings and low VSWR are available from PolyPhaser. and for
multiconduabr cable there are also suitable suppressors altered. We don’t htentiomliy wish to tout any
particular vendor. but these produas are highly recommended.
Fuses-29 m d Dec. 11 1906 29-7 VHF Amplifier imitation
VHF AMPLIFIER lNSTALLATION
l IJGHTNING AND OTHER TRANSIENT PROTECTION - I (arterial: (confirmed).
Coaxial line and other lower drcuit surge suppressors sheila be mounted on and grounded to the bulkhead.
which must be well grounded (that means low inductance as wail) with at least two, 150 mm x 115 mm copper
straps lathe lowergroundsystemt Any bends in these strapsshould be as graduates poaible.
Bearelhatallgremdpaminpedanosareasieweepossmle.mdu'ytaanangemesuppressorlorztionsano
their grounding eondufiors so that personnel Gnnot oome in nomad with them during a thunderstorm. This
some wrrents underground. All suppressors and ewipmem ground connections. however, should be made
no the bulkhead plate which is bonded to the tower ground system.
toroids integrated together. which may be worthMiite muse the finite provides the necessary impedance
betwaentha suppressorand lheequipment. and avoidsthe need forsomoing atlaastlwo largeteroids thetwill
fitoverlhefowlarga conductors neededbythetypleal SphaseAc powerservioeemranoe. Otherdesigm use
air core inductors to avoid possible samratien of ferrite material from sumssive unkiiredional lightning hits.
Atleastone otherbrandhdudesrighpoweredaotivefiiterrieuits Besuretp devmesomeotyourtimetn
investigation of the various suppressors available to suit your applications (you will indeed have several
applleatiens on site) before you- clecisien is made
It is notagood ideamgowitrwutsupprauors. orwlttwutisolating impedanoes betweenthesuppressersand
the equipment becausemerawouldthennetbeaeonh'oledpathtortheightnirrgenergytofollew,husitis
possible that the next hit crud tlnd an easier path Winch the PA module cirmit components. power supply
rectifiers, or power transformer insulation. and these imms fin become quite expensive.
Generally, pas protector devims are useful on circuits having relatively low voltage but higher source
impedanceasintelephoneandsignallingsymm. Wuhspeoialgases.theymnbeelleofiveon500fines.
espadaiyvmaemeuammmu‘sVSWRpmmdionshutsoflBnRanmwiydunngflHam ACpowarline
soumeimpedenoesaremuchmolowforgastltledpretecmrdevmtofunofionpropenyjeoeute onoeanan:
beginsthare,megasphenammairslorfiudbngmrghmmanenAChencydewMuds.menmnen
ate resulting mammary high wrrenttlowlruoughthegm. Surge suppressors ushg MovsworkbestforAC
metmmflmfihaveuMMwahnpeoanoemamprpomnndmenghfimenergygoes
mgroundetlhetowerbaseorguymdiers,andenlyasmeiiomomtthenneedstobedissipaledlnthe
suppressors Loonflrlgmellnebridgebemeenmemerandme buildingaslowespassiblau melaroralp
4k above grade is suggested) will ramttin lawerhduced energy into all suppressors, and atlhesame time.
”Hemmeneededmmbmadtmmetopolhemmfltefcabmetorpatdlpenel,dmmme
bulldtead platewilladd desirable isolating indudanoe.
Mmytypesefproteofimdevioesareavafiebleatewiderangeofpnees. Meventhemostexpensive protection
Is extremely economical when compared with potential cost! of affair loss of revenue, and/or the costs of
rebuilding or replacemem oflhe equipment being pretreated
You may use wishto eonsrltwilh yaurpwer utility company engineers; their extensive experience with lightning
and grounding muld certainly quaify them to be able to advise you about these same subjeds, and a phone
ml or FAX to the dePhaser people might also prove womvmiie
PolyPhaser numbers: Phone 1-800325-7170 or (702)<7B2-251 1; and their FAX is (7 02)-782-4476.
Fuses—29 revo: Dee 12 1998 29-8 VHF Amplifier imitation
VHF AMPIJFIER INSTALLATION
4. A FEW WORDS ABOUT POWER WIRING:
This tmrlsmiiter requires a single phase power source. The transmifler power supply is a switcher type with
auhoranging AC input allowing it to operate in the ranges of 90 in 135 V or180 to 270 V. Typimi measured
power consumption at black, amplifier only. is 200 VA at 49% PF ffl‘ the TTS‘IOB. and 285 VA 814996 PF for
the TTSsOE. The exciton though. needs its primary taps set for appropriate line voltage. Mitch must be within
21016 ofriominai. Taps are at 100, 120, 130, 200. 210, 220, 230. 240, 250. and 260 V.
Thestandarddesignmmehanuninertoopemteine-tommaifiwnshglepnaselwmtsov. For
operation intypieeISOI-izregions. maSSDVor416Vmeheisavalable.theti-ansmltteralscweuldbe
connected to operate uneMuh-d. Line to neutral in 380 V 3 phase mails is 20 V, and in 415 V 3 phase
mains. lite to neutral is 240 V. Optionally (with added fuse 1F2) it can be opetated line-(Mine when used as
a mndby eta sitewherezfle V3 phase pmris available, oriromsingie phase 115-0-115 V power.
All switcher power supplies use a lame Input filter capacitor, which is the reason for the poor powerl'amt.
"Power teeter is based on measurement of zero uossings of Input voltage and input current and 100 times
mmotmwouosshgsangtwmmmeismepowwmmm Astheswitcheroperates
titefiie'tzpedtorrediageumemoculsintflmwhighunmpeeks,soit'temrrentzeroaossingsobviously
don'lcolnddew'tmmevomgezemanssings. Fumennore.aism.p.fliempediofhaenoemddmeend
takes a largeinrush wrrenttcrihetirsttewAc cydesiobringitsmreddtargeuptoavaweencughtcrme
supply to opetate. Tune oelaytuseeor'dmrlt breakers are it'lerefore nmryen the powerline feedingthe
transmitter. Vendorspedfiedvonegepeek thrush ourrentisabomssampe
For standard fine-mt operation, afuse1F1 is provided; for-the 115108 thistuse is 7 amps stow blow,
andfurtitefissoettiettseisizampsstowbiow. Formoowefsouoemesuggestthataslowtripbreeker
of 15 amps, miedfermobrsfininq service. sl’touldbe satisfactory. Emerlowestvoiiage theTI'SSOE
transmitter and its exoiter heather should draw less than 5 amps. so a 15 amp breaker is adequate. For
optional iiie-to-line operation. the transrniiterisfittedwim Mothses,1F1aid1F2.
Asinusordaloutput ACvoItage mgulstpris recommended so thanhe anew-AC input maimwithin its 11096
imitation. eepecieiiyetsiteswhere the voltages fluctuate widely.
Regulators havinqvariebie transformetsthatworke bunk-boost oomediontothe maim, provide sinusoidal
uspmsmusaremebemegumtormepurpose Onesnunwaoeattisfliatsomevanailetrmsfmnersere
mmmwmmmmmeomgmennfimoemmmmvfltage, Forrmetsimations,
mosteftt-ietirne,themainsvoltegevariefionrateisstowenwghmatlfisisrmofoonoem'
Motoronvenreguatorresponsespeedismtusualyaiticeljmmereismmafionformistypecfiegdamr
that should be inept in mind: Many powerhilurel are preceded by an abnomleiiy low mains voltage with
oonsequenthighestoutpmtrcmthereguenor, andupon restoraflonotpvmttnotmoftheregmatorvdll
Mombeatmmaidhunlwmelengmomnequredtormemguhwmmpond
To make matters worse. often the restored iicoming nielris voltage wil be well above normal for several
same. A powersurge of extremely high voltage thus fin be applied to the equipment.
Therelsasomtiontomisregulamrresponseprobiem: mmgdainrmdbespedfiedtohavebamty
bacialp, aDCservoamph’flerendDCrnoflordnvingthe variable transformer. and compilerarrangements soul
that it will reset itselir to its LOWESToutput voltage DURING a power white. The room in! be that upon
restoration, the output voltage will begin at its lowest value This will avoid equipment We
Setthg oftheregrlatprtorfigtitreguiationvdl wuseitto oonedorien forsmel incoming voltage oranges. whid’t
mayresdi'n'lueased bmshweerinthevflienle iranstomtens). Sonteregulatotswhidi have no brushes use
special transformers In which Mo coils move in relation to each other. The original designs of these variable
transit-inner: came from General Elearic and were called ‘1nduetrol" regulators.
Piraeus rev it Dee 12, was 29-9 VHF Amplifier imitation
VHF AMPUFlER INSTALLATION
4. A FEW WORDS ABOUT POWER “RING: (mminued).
Another companys design ctregulator made use of a large mberof thyristordevices to with taps on a
trawlerrnerwindingjndmuidreqrmetleattwoACwdastorflsoommllerci’wittodeddemmtapneeded
bbesuitdtedmimmeremluhatsmetlspikeswereinherenttypatot‘mereguatedcmput.
The TTS1OB or 173508 and its meter have good internal regulation for Mde memes (noninal 11036) of
inciting line voltage, but other tan-site equipment may not be as forgiving of poor line regulation, and a voltage
regthorisedesiabteameswry. lfthesitemainsvoltaqe magmrman 1096 variation. e voltage
regulator that has wide urge input voltage specifications, should be cmsidered mandatory.
5. VENflLAT'ION/NR CONDlTlONlNG INFORMA‘HON
Atblackleveiwitt-ifullaurflpmr,ItiemafimumamoumdheatisgmemtedbylheRFen-plfler. This heat
islemovedbybreedoonvedientmmtheheatslrk Abuittmbmrerpushesei'mmughmeheatsinkfiun
vmiehitisamaustedmmehansmiltermom. Caremustbetakenmatmaspedfledmardrmntransmitter
armient temperature 0145'0 is not exceeded at any time.
TheRFeveiaqepweroutputdetiveredtametransmissionImhelmsflwattsatbtedrlevetwimaumlm,
whenmeTTStOBtransnimerisoper-afingetltsretedpeakvisuatmd timem'etomput. Subtrarfingthis7w
amomtt'mrnthe(200VAx.49PF)=9&WefAprerInpuLgivesmmamatgemmtedbyeilmgeshme
msmiuenaboutsuww. AddlhetOOWexdterpowerhpmb'his.andmemtdiswomtsflWfortha
Immefontmaln unwise,menssuedelmaveragepmorssmememm-makesam
(285VAxr4ePF)=140WofAcpmrimmrmgmmaboutoswamorhmammmm
=m5mtrsofmarmmmeain Mequipmemheetamumdonotimwdemeheetdiefipebdbyim
andmonitodrtgequipnrentoromersoumesofheetinmmm
DuewmemmpteudtyMVnenfimdedpfimoffinafinngfiafimmdekmnfiomng'WAC).itis
recommended for best results that the services of an erqaerieneed a‘r corritionhg contractor/engineer be
engaged forthe design and implementation otyowbuilding a'r mittenhg orventlletton synem. This is
partupsmeimporiamatsharedsitesushgesinglem.mushrm-wayredo,ceflphone.teleo.endlor
Mmmesmwflmnufifiesmmemmmayuhflnmwmm
Forbutgetarypupcsethmaywishhpeflcnnfisufinafingmrdse: Assumingatransrritfiersiteonlylno
studio fedlities), moor-mummmwc. typicalywlndvfllessoowete btodtwalls, minsulated
premwnaetemof,mdoveraidmions16flx20flx11ttitwmobabtyrewieebunz‘zstnam
olrefi'igeratimlokaepmebuifinghabi‘huefuran measumemmzo'mzs'cmmipmm Thisis
equivalenttomaybe5kWothe8t,artdoqijprnemmathededdsmmmameafutasmperhwrror
everyldlmattofheat,vmmwomsomtoabanoatonufreffigemfionrequiredtnremevemldlowettal'heat.
T'hereare120003TUperhotrinetmofretrlgefltiel-r.
Tmrfltterheatisspedfledabwe,brxtmemdtequipmentandnghtinglcedsereimpedfied Simplytotalthe
i‘lputpwerferthisotherequhmem,sineeyoumnsafelyassumeelliuACimgemwnvertedi-mheet Add
munmmandmmwe addtheresuttnfl'IBSkarfl'temlldng,muflptymelntalkWnunberby
0.3.mundfl'iemsukrpmmenmmtegmlmmberjndmatismappmmmmnmge.
Reference to mail order Wings (Sears, etc) lndhztee approxirmtsly the price per hall-ton tera 6000 BTU
windwmumairoanmner: Wedon't recommend Mndwmmmaireonditionersbefiusetheyaenot
mummmammmmmmmmmmuspmmm This
price perhsti-lon mustthenbemrltiplied bytwoandmenbyynur'ntegrelnumberoftme Theresuttofthis
math representsacontinmusty running system; multiply againbymt'ormainaitemale.
HESS-Ema 000.12 1995 29-10 vr-iFmprni-rumnafim
VHF AMPLIFIER INSTALLA'HON
The resuming total gives you an approximate equipment cost. less installation Your air conditioning connector
should then be asked for an official estimate, induding installation and warranty.
8. FIRE PROTECTION
Somepersonsmaythirktha‘tthetoming material is totally overdonefora lowpowered transmittersite; indeed,
menysuchsitsareinremoteregionsoflhecoumryandwouldprobabiysustainlermoredamagelromforest
fires than tromllres originating in the equipment «elsewhere inside the building, Nevertheless, you mayllnd
something ottechnicel inerestirithispet'tevendtough someofitmeynotbereievamtoyou.
Transmitter interlock connections are on m4 and T82-4 on the back of the amplifier chassis. These
conrieotionsform a series pathfor'Extemd interlock #1"whid| enables the transmitters control cirwit. including
itsbitmerr Beausetheairis simply exharistedtothe room, inmseofilrethe wrrentolairlromthetransmilter
mayl‘an the names, so itis desirablethatthe blwerbestopped. Allrealarmsystem shoddbe ableto be
an-angedtoprovideesetofnonnailyoioseddrycontadslooonnecthtodiisineriodringu‘rcuititis
recommended that this be done,
other alarm system contacts may also be needed for various purposes separate item the transmitter. These
extra alarm syeem cornacts may be needed to shut down other air systems in the building, to close air dampers
and tire doors, and to enable activation of automatic firefighting apparatus, if provided. One extra set of dry
oontaotsshouid bemadeavailablelorreporting ofthefire mmugh the remotecorttmi.
Bu‘idingdesigte'sometrwghtmata lire alarm system needed onlyto trip the main AC breakerto the building,
whiclwlomdamomatioewmpalllansandbiowers. Aslongasthellreisprevemedtromspreafinqoyenswing
allbiowersaestbppedandairdampers dosed. momedoommedoseimereisnoreasonlhamc cannot
remain on. to keep light‘ngavailable l'orevacuationofpersonnel.
For installations where the transmitter is located on top of a tall building. the main AC should never be able to
be tripped by a tire alarm, because doing this can also stop elevators lull of people, sometimes between floors.
fire alarm systems lortheee situations should be engineered by spedaiists.
itis assumedthat it an emergency attemater is installed at the station, it is located in eittiera separate building.
efireprootvautwilhitsewnseperateventiiation, erin itsownencioswe. andisfittedvnthitsomlireprotecfion
systems, so the above air-system considerations would not apply to it. Specific building codes may apply to it
though. partialerty regarflng its fuel supply. it Is well to died: with your fire chief, fire marshell's office. and/or
builtfing inspector tor applicable code requirements.
The transmitter plant, particularly those using higher powered transmitting equipment represents too large an
Invest-nerd to neglect its fi'e proteaion, especially for matter-19d sites having diltlcdt access investigation of
available fire alarm and tire lighting systems should be carried out as early in the design process as possible,
and well before llnal design commitment. Your local lire chief or fire mershall's ofltce may be helpltil sources
of advice during blaming of your installation.
Even ifthe site is normaly amended, it must be mandatory that any automatically activated fire fighting system
an be disabled whenever personnel are working in the space protected by the system Most systems for use
with electoral appaetus, depend on the high pressure discharge of carbon dioxide, halogenated hydrocarbons
sum as Halon". when tetradtioride, or other equally deadly extinguisher gases into a closed equipment team:
this puts a fire out by displacing all oxygen. Obviously, the design must be faflsafe, because when personnel
are working in the room, they must never under any circumstances be exposed to a risk ofsystem mdfunzxion
Mrichcouldbelatal. Checkltisout: it’s important.
Fuses-29 rev 0: Dec. 12 1995 29-11 VHF Amplifier installation
VHF AMPLIFIER msmumou
7. UNPACflNG
Caetuwmpedesdlpaimgeasnismcdvubrpossibleshippmgdamage. aimsfofdamaqedequipmem
mustbeflledwlmmammwdaysofdelweryarmedaimvdunotbeemepmd.
Unless spedficoamracmel arrangememsforfille, FOBloeation, etc. have been nude, generallylne delivery
afmeequipmtomeeermrbyLARCANlNcioonsfitnestzansferoffinetomemsmmerjndnismrefore
watcmerresponsibilityhenmhatanysudldeimsam pmpflyfileddimalywimmemnien
Chodtmeequbmenheeeivedegammosfippingflst Shandmereqapearbbeasfipplngefmrorlf
mmwmmmummmmmfimmmofiyywuncmmfimm
maspossm.
lfconstucfionormuvalionvmmanhemmmrsiteisnotmpletebymetimmeeqmpmemismoelved,
repackalleqtipmemmnwamermeirmpedionemsmveminadeen,mjryereemevoidhenmomy
oflheequipmem. Repwmeormmgeshmubspeflomedinmmmumprmmafissbymieeand
umerwulanimmundmugemmhgs Cormdmmm§ptasterdustmelalfifinga
andmrmewmamiwmemefingmeeqtflpmemmnnlsomdamage
Whentheeonsuuuionworkiscen-lpleuflheareashwldbodearedolaldirtenddebfis.mdvemwned
homugl'llybefomfl'leemipmentisinslalled. Plainoonu’etaflootsshouldbesealedorfiedtopmvemsurfeoe
mistflmnbehgmmmommem
Whenthemmismplatsjwmsmflagalnbemmdflafldmuflmadonm mm.
before anyofmeequiptmntisiritialrymmed on. Mforloesesu'ewsandmdions. and tighten mare
necessary.
Finally: before powering up, be eemin that nl tools, surplus and scrap manor: mamas. stray m3.
stray ‘blobs'ofsolder endewtfmmwies. striapedwlfeinsulation, end omens-ash, erecempletely removed
mmimidemeeebinets.
I. TRANSMITTER EXTERNAL INTERLOCK CONNECTIONS:
RF PATCH PANEL: '
: w m)
: mt me P/S
: couucron
. ,,_
.' o . a
. +
- o x 0
1K!
"RE ALARM Exr mx |
figure 1: TTS1OBand TrSSOBTransn-lmer lntenodt Conmcfions.
Puma-29 ma: Dec; 12 1998 29-12 vHFAmplifier Installation
VHF AMPLIFIER INSTALLATION
Wewfllbehfisthmmmlypeopbmhk'lmemddng'isovarmmnforamlawptmsrsdequ'pmem.
mammhevesrmumdlinejumpen1md21oryoutnusemllwollmemdts. Jus'lincassymno
need(Marlow,smasvmmmamplifierisadflverfurahignpowaredmanmmls: Allimarlwkssm
wwemrgy. 12VDC,andwnsmsminmeovderofabom250nulnampems. Conneefiorlsmwnm
inwardly mammwsformuncm finsfitfisfijslnllows.
Nomallydosedemlansfiommwidlngmdann sysearnshould amnefllnfxllmsm 1‘(1T82-3.4)
mmmmmmmmnmmmm. Thismnalslmcomadwuldeomedhsems
wlfl'lanypamhpandmmmwbadmmnckvdfing,unvfichanbemm.mmpamlm
mmwmmmwmmmmmmmrfimaamm. Tmnsmiltfir
operationillumfmmelfllenmowmmebmenmmmismmmwslndlmommn
bymmmmmmnmnfinermdpanel,mdbymmmwm
9. FIRST-“ME ONSITE TRANSMITTER START -UP PROCEDURE:
1. Commemsnmmmawomndummyloadnrmsmnna Themimrusesason
lypeNcnnnmrfurllsoulput Anhllnewamneterwmaseledlonofdmelememsshoddbe
usedlurmeasuxemems.
2. Trmsmillelsmmma 1 Vpoak-lp-peakvidoosignalmme mdmator videoinpmjack Connect
mmmmmmmwmmmmme RF oulpmmme inpumflhe amplifier.
Tmmmmmmwmmmmmmmmmmm
ammmmwoflmwplfler.
3. ConnectmfisvmmnslnmmisACcfi'szhmddberatedfoflsflmpemmdshwldbe
wplisdmhastowubptheakerarfl'nedelayfuse.Gmemly,abmskafmismadfw
amm—Emanmwflbemuflmhem.
4. Depressmaflnpiflel'ONpushbumn.mmmeLEDsmtdeXT1,TEMP.aMEXl23houldbe
w.mdmanplmarpowerwplysmuldbeopeming. Verflymisbyobsewingmebluwar,md1
kpoweredbylmamplllerpuwsrsmplyammshwdbemmmg.
5. ThaampllflarissquippedwmovarpmraMVSWRpmMonsmhavebeenfawrysetTnset
Mammammmmmmmnm,mplyaqustmmamsommmmof
mamrjtflm1m.
6. Forampnllersequpcdwm'lAGc (latarmodeQWMAGCADJ level control). hmallysetlheopetafion
mmuwmmmmwmmmmmcmmomnmmmmmmm
mmwwramomoss.
7. smmAGCoperafioMAGCswr/Mllt) and adjustmeAGCADJ potsnfiome‘erun mesmpfifisrfrnm
mlforamemrmadlngofiflflfi.
Fuses-29mm Doc. 12 1993 29-13 wwma hut-man
Notes:
Posse-29mm Dec,121m
VHF “Pl-FER INSTALLAflON
29-14
VHF Amplifier Indium
VHF AMPLIFIER CHASSIS
Comm:
Part Topic Page
1 Chassis Description ....................................................... 304
List of Figures:
Fig Trlie Drawing Reference
1 Chassis Assembly Diagram ............................... 4002158 sht 1
wiring Diagram, Amplifier, AC Line to Neutral . aoc1es7 sin 1
3 ‘powemne' Power Supply Data ............................
1. Amplifier Chassis Assembly 400216061 through 400216863: Figure 1.
The Amplifier Chassis consists of a standard 19" rack mounted 571 EU endosure containing 2 linear power
supplies. the amplifier heatsink assembly, the output direetionat coupler, the bandpass filter (in most models),
a ooelinofan,eeontrotpanel(metermdoontmtboard).mRFnleterirlgboard,afi1efiwr,andenACreley.
Its basic part mmber is 4002168.
Three frequency ranges are required to cover the entire VHF television spearum, thus there are three
fimdan‘entat models of RF amplifier assemblies: forchanheie 2. 3, 4: channels 5, e; and channels 7 - 13.
ACpowerhputtbrmelhreeAmpifier/rnodeleisoomededforsystnmopefitlenlmmoneineteneutral.most
oommonlytrom115voilsACeinglephase.
400216861 Is the chassis for a 10 watt amplifier for operation on drennels 7 through 13 (174—216 MHz),
ithes 3150wattpowersupply. and its AC is oonnectedlinetoneulral.
400216862 isthedtasistora towettAmpllfier foropemtion on ehannelsZ. 3. and4(54—72 MHz), lthea
a150wettpo~ersuppfymndlnACisoonneotedlnetnneutreL
400216863 is the chassis for a 10 watt Amplifier for operation on d'lenrtels 5 and 6 (75-88 MHz). it has a
150wattpewersupply,anditsACisoonnecteolinetoneulrat.
Although we indicate N‘f‘sc frequency rangeaJhe amplifiers are capable of frequency coverage outside the
ranges cited. for CClR systems 8, D. ell: transmitter epptlations in otherreglonsmrtowide.
Figure 1 is the fundamental assembly drawing of the chassis.
The heabink cooling fan is a 48 volt DC 'Mutfin" model from Comair—Relnon; ills powered item the 48 volt
amplifier power supply As bunt, the ooolng tan pulls warmed air tom the heatsink so the cooling air enters
through the perforations In the diesels front panel. This may be more convenient for a desldop eebinet
arrangement, but for cabinet lacks fitted with ventilation filtering. the fan eon be medlenimlly reversed end for
end, and remountert so thatthefan forces airthrough the heelslnk, fremwhidrlhewamled airexhausl leaves
the diesels through the front panel perforations.
Fuses-acme: Dee12,1990 30-1 10W VHFAmplltlsr
LOWPOWERlNTERNALLY DIPLEXED TRANSMITTER CHASSIS
Amemusmismuedonmhemhkmmngnmpemmmeanbesampbi lfmistamperatum
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