TFT EAS 930A User manual

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INCORPORATED
.OD L EAS 930A
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.: ODULE REC V ,R
R'S G ID
TFT INCORPORATED
1953 CONCOURSE DRIVE
SA JOSE, CA 95131-1708

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MODEL 930A
MULTI-M
1
O ULE RECEIVER
USER'S GUIDE
'
C.
1953 Concour
Dnve
an
Jo
A
95
31-1708
• (
408)
943-9323
J\X: (408 432-9218
ttp
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w.
o.
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CONTENTS
CHAPTER 1 - GENERAL INFORMATION
Paragraph Title Page
1.1 About this Guide ... .......................................................................................................................... 1 -1
1.2 Overview of this Guide ........ ....... .............. ...... . .................. .................................. ... ......................... 1-1
1. 3 Imroducing the Model EAS 930A Receiver ........................ .... ..... .... ........... ....... .................................. 1 -2
1.4 Specifications ........ ... ........... . ............. . ........................................................................................... 1 -3
1.5 Warranty Information ...................................................................................................................... 1-4
1.6 Claims for Damage in Shipment ...................................................... :··········· ··········· ····················...... 1-4
CHAPTER 2 - GETIING TO KNOW YOUR EAS 930A
2.1 Unpacking and Inspection ...... .................. . ....... .. ... ........... ............ ...... ............................................. 2-1
2.2 Front Panel Controls and Indicators . ....... ... ................................ .......................... ............................... 2-1
2.3 Rear Panel Controls and Connectors ..................... ....... . ............................ ....... .......... .......... ............... 2-3
CHAPTER 3 - PRE-INSTALLATION CHECKOUT
3.l Introduction ...................................................................... ... ........................................................... 3-1
3.2 System Operation ............................................................................................................................ 3-1
3.3 Selection of Operating Frequencies ........................... ..... ................. .... ............... . .......... .. ... ................. 3-1
3.3.I Selection of AM ReceiverFrequency.... .................. ...... ..................... ........ .............................. 3-1
3.3.2 Selection of FM Receiver Frequency...... ... .... ..... .... ... .......................... . ........ ........................... 3-1
3.3.3 Selection of NOAA Weather Radio Receiver Frequency......... ....... ................... ........................... 3-2
3.4 Pre-Installation Checkout of the EAS 930A ........................................... .............................................. 3-2
3.4.1 AM ReceiverChecks ....... ......... . ............ ..... ... .... ...... . ........................................................... 3-2
3.4.2 FM Receiver Checks ................. . .......................................................................................... 3-2
3.4.3 NOAAWeatherRadio ReceiverCheck ..... .... ............... .... .................. ......... .. ........................... 3-2
CHAPTER 4 - INSTALLATION AND OPERATION
4.1 Introduction ...................... .. ............................................................................................................ 4-1
4 .2 Model EAS 930A System Installation .......................................... . ...................... . ............................... 4-1
4.3 FM andNOAAWeather Radio Antenna Installation ......... ...................... ... .. ....................... ....................4-2
4.4 AM AntennaInstallation ....................... ......... ......... . ............ ... ........................ .......... ....................... 4-2
4.5 Receiv ed Signal StrengthIndication (RSSI) ......................................................................................... .4-2
4.6 HowtoInstall a New ReceiverModule.... ............................................................................................ 4-3
4.6.1 AM Receiver Kit Installation Procedure ................................................................................... 4-3
4.6 .2 FM Receiver KitInstallation Procedure ........................ . ....................... . ......... ......................... 4-4
4.6.3 Weather Radio Receiver Kit Installation Proced ur e ..................................................................... 4-4

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CONTENTS (Continued)
CHAPTER 5 - THEORY OF OPERATION
Paragra ph Titl e P age
5. 1 In tr od uction ................................................................................................................................... 5- I
5.2 System Bl oc k Di agram Description ................................................................................................... 5-1
5.3 AM Recei ve r Module Block Diagram Description ................................................................................. 5-2
5.4 FM Receiver Module Block Di agram Description .................................................................................. 5-3
5.5 NoaaWeather Rec ei v er ModuleBlock Diagram Description ................................. . ....... . ........................... 5-4
5.6 Speaker Amp & Power Supply Board Circuit Desc ri ption ...................................................................... 5-6
C HA PTER 6 -MAINTENANCE
6.1 General Info nn ation ................................................... . ................................................... .................6-1
6.2 AM Receiver Pe
rf ormanceChecks ..................................................................................................... 6-1
6.2.1 AM Receiver Sen si tivity Check .............................................................................................. 6-1
6.2.2 AM Receiver AGC Ran ge Check.. ........................................................................................... 6-2
6.2.3 AM Receiv
er Audio Output Adjustment ................................................................................... 6-2
6.3 FM Recei ve r Performance Checks ..................................................................................................... 6-2
6.3.l FM Receiver
Se nsitivity Ch eck ............................................................................................... 6-2
6.3.2 FM Receiver A
GC Range Check .................... . ..................................................................... ... 6-3
6.3.3 FM Receiver Audio Output Adjus tm ent ............................... . ................................................... 6-3
6.4 NOAAWeather Radio ReceiverPerforman ce Checks ............................................................................. 6-4
6.4.I NOAA W ea ther Radio Receiver Sensitivity check .................................... . .................................. 6-4
6.4.2 NOAA Weather Radio Receiver AGC Range Ch
ec k .................................................................... 6-4
6.4.3 NOAAWeatherRadio ReceiverAudio Output Adjustment .......................................................... 6-5
6.5 Troublesh
oo ting Guide ..................................................................................................................... 6-5
5.5.l AM Receiver Module ...................................................................... . ................ . .................... 6-5
5.5.2 FM Receiver Module
............................................................................................................. 6-5
5.5.3 NOAA W
ea ther Radio ReceiverM od ule ................................................................................... 6-6
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ILLUSTRATIONS
Figures Title Pag e
1-1 Model EAS 930A Multi-Module Receiver Basic Bl ock Diagram ....... . ............ . ............. ...... ...................... 1-2
2-1 ReceiverFront Panel
Co ntr ols and Ind icatiors.. .............. ...... ...................... ...................... .... . ..... ...... ..... 2-1
2-2 AMReceiverModule Edge - Mounted Co ntrols and Indicatiors ... ... .............. . .......................................... 2-2
2-3
FM ReceiverModule Edge -Mounted Controls and Indicatiors ........................ ...... ......................... .. ....... 2-2
2-4 WeatherReceiverModuleEdge •
Mou nt ed Co ntrols and Indicatiors .......................................................... 2-2
2-5 ReceiverRear Panel Controls and Indicatiors ... .... . ............... . ........... .. ................. . ....... . ......................... 2-3
3-1 AM ReceiverControls and Indicatiors
....................................................... .... ...................................... 3-1
3-2 FM ReceiverControls and lnd icatiors .................................................................................................. 3 -1
3-3 NOAAWeatherRadio ReceiverControls and lndi ca tiors ................. .. ... . .................................................. 3-2
4-1 EAS
930A RF Input Connections .................... . ................. . ............................................................... 4-1
4-2
RF Receiver RSSI vs. RF Input ........................................................................................................ 4-2
4-3 NOAA Receiver RSSI vs. RF Input ................................................................................................... 4-2
4-4
AM Receiver RSSI vs. RF Input ................... .. ................... ... .... ... .... . ............. ..... ............................. .4-2
4-5 Receiver Kit InstallationDiagram
............... .... ........ . ................ . ...... .... ..... . ................................. ......... 4-5
5-1 EAS 930A Multi-Module Receiver-Basic Bl ock Diagram ....................... . ..... .. ... .......... ...... .................... 5-1
5-2 AM Receiver Module - BlockDiagraxn ............ .. ... .. ......... . .............. ... .......... .. ............................. . ........ 5-3
5-3 FM Receiver Module • Bl ock Diagraxn .... ... ....... .. .... ....... .... ............ .. .... ..... .... .... .................................. 5-4
5-4 NOAAWeatherReceiverModule -Block Diagram ........................................................................ . ....... 5-5
5-5 Speaker Amp & Power Supply Board -Simplified Schematic Diagram .................... .......... .... .................... 5-6
TABLES
Title
Pag e
Table
1-1
Specifications ......... .... ... . .... .... ......... .... ..... ... ... ................... .. ...................... ...... ....... .... ..... ......... ..... 1-3
2-1
2-2
3-1
3-2
4-1
6-1
6-2
6-3
Recei ve r Fr ont Panel Controls and Indicatiors ....................................................................................... 2-1
Receiver RearPanel Controls and Indicatiors ............ .. ...... ..... ..... .... .. .............. ......... .. ........ ................... 2-3
NOAAChannel Frequencies .............................................................................................................. 3-2
NOAA WeatherRadio Network... .... .. .............................. .... ...... . .................... . ... .. .............................. 3-3
R ece i ve r Kit PartNumbers ................................................................................................................ 4-3
AM Receiver Test Po int Data ............................................................................................................ 6-5
FM Re ceiver T est Point Data ............................................................................................................ 6-6
NOAA Weather ReceiverTest
Po int Data .......................................... . ................................................. 6-6
ill

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APPENDIX A -ENGINEERING DRAWINGS
Figure No. Title Drawing No.
A-1 Speaker Amp . & P ower Supply Board, Sc hematic .............................................................. 660 1-4026
A-2 Speaker Amp. &
Power Supply Board, PCB Assy ......................................... .... ................. 6608-4026
A-3
AM ReceiverBoard, Schematic ....................................................................................... 660 1-4038
A-4
AM ReceiverBoard, PCB Assy .................................................. .. ................................... 6608-4038
A-5
FM ReceiverBoard, Sc hematic .............. . ....................... .... ........ . ............... .. .................. 6601-4037
A-6
FM Receiver Board, PCB Assy ....................................................................................... 6608-4037
A-7 NOAA
Wea th er Radio Receiver Board , Schematic ............. . ....................................... . .... ..... 6601-4039
A-8 NOAAWeatherRadioReceiver Board, PCB Assy
.............................................................. 6608-4039
APPENDIX B -PARTS LIST
B -1 SpeakerAmplifier & PowerSupply B oar d Assembly .......................................................... 6608-4026
B-2 AM ReceiverBoard Assembly
........................ . ......................................................... . ..... 6608-4038
B-3 FM Receiver BoardAssembly ......... . ......... ....... ....... .... .. .............. ....... ............................ 6608-4037
B-4 NOAAWeatherRadio Board Assembly
........................................................................... 6608-4039
iv

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Chapter 1 - General Information
1 .1 About This Guide
This user 's guidecontains instructions for unpacking, setting up, operating, and routine maintenance
of the 1Ff Model EAS 930A Multi-Module radio receiver for use in conjunction with the new
Emergency Alert System (EAS).
It is recommended thatthe user read this Guide , and follow the pre-installation checkout in Chapter 3
and the steps in Chapter 4 for installation and operation.
1.2 Overview of This Guide
• Chapter 1 contains a general description of the Receiver, technical specifications, and
warranty information.
• Chapter2 contains instructions for unpacking and
in specting the Receiver, an explanation of
front and rear panel controls, indicators andconnectors, and a description of accessory items.
• Chapter 3 contains instructions for selection
of receiver operating frequencies, and pr e-
installation checkoutprocedures.
• Chapter 4 contains instructions for installation
of antennas, and connections to the Mod el
EAS 930A. It also describers the field installation of the receiver modules when required.
• Chapter 5 describes the theory
of operation of th e Receiver beginning with a system bl ock
diagram description, following by block diagram descriptions
of the AM , FM , and NOAA
receiver modules and the speaker amplifierand power supply board.
• Chapter 6 contains maintenance instructions including performance checks
of the AM , FM
and NOAA channels. A troubleshooting guide is also included.
• Appendix A contains Assembly and Schematic drawings
of Receivercircuit board s.
• Appendix B is a parts list for the EAS 930A.
1 -1

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1.
3
Introducing the Model EAS 930A Receiver
The
TFf
Model
EAS
930A
Multi-Module Receiver System is a compact, modular radio receiver
system for
use
with
TFf
'
s EAS 911 Emergency Alert System Decoder
to
enable broadcasters to
participate
in
the Emergency Alert System. The EAS 930A consists
of
a chassis containing a power
supply, audio amplifier, and built-in speaker. The unit
can
accommodate
up
to four field-installable
receiver modules. The receiver modules
can
be
any combination
of
AM
receiver,
FM
Receiver,
Weather Radio Receiver
or
VHF/UHF
Receiver. Figure
1-1
is
a basic block diagram
of
the Multi-
Module Receiver.
The FMReceivermodule is a high-performance professional receiver tunableacross
the
FM broadcast
bandfrom
88
to
108 MHzin 100
kHz
increments
via
a 3-digitfront panel rotary switch.
The
AM
Receiver module
uses
a frequency-synthesized local oscillator which is phase-locked to a
crystal oscillator. It
is
tunable across the
AM
broadcast band from
540
to
1720
kHz
in 10 kHz
increments via a 3-digitfront panel rotary switch.
The
NOAA
Weather Radio Receiver module is a dual
-co
nversion,
FM
narrow-band receiver. It is
tunable from 162.40
to
162.55 MHz
in
25
kHz
increments
via
a single-digitfront panel rotary switch.
All three receivers
are
provided in
the
standard
EAS
930A equipment. A fourth module
can
be
added
to
the chassis. Instructions for field installation
of
receiver modules
is
given in Chapter4.
Each receiver module has loop-through circuitry for hot standby configuration.
It
switches
to
the audio
of
the hot standby receiver when the primary station
is
off
, then switches back
when
the
RF
signal
returns. Relay contacts providedrop-out alarm.
'v
..,
..
'v
.,
..
71
.,
..
.,,
..
1
-2
RECE
IV
ER
1 1
..
. .
...
RECEIVER•
2
....
.
...
RECE
I
VER
♦
3
RECEIVERI
4
)-
........
OOlffACTa
}
~°""""
__._,._OUT
---
}-
M..#JIW
co-,TAC"T6
}
rouu~
OVTNT
LNIAli..AHCCO
Al.DO
OUT
_,.....,._IIIICCO
MOIO
tril
}-
...,.,..
CONT
ACTO
}
--
OUffll'f
TO
U8
911
_,.._,._OUT
.............
NCIIOMOON
}----·
}
;~
OVTl'VT
1
.,...,,.u.,cm
AUDIO
OUT
....
4.1,,.ANCIO
A.I.OIO
N
AUDIO
.n.acT
.--.I
,;;-------t-
_:'i
.....
4UOlo
A\.OtO
T"
OUT
,,_
-
...
__
_
•••.....-+----t
POWER
SUPPLY
t-------1-
-••
.,
Figure 1-1. Model
EAS
930A
Multi-ModuleReceiver Basic BlockDiagram

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A speaker on the front panel pro vid es audio monitoring of each receiver output. A front panel
accessible 5-position switch is used
to s elect the receiveraudio to be monitored. The speak.er works in
co njunction with the VOLUME control al so mo un ted on thefront panel.
The Model EAS 930A is configured at the factory with an
AM , FM , and NOAA receiver. The unit
operates from a 117 V
AC , 50 or 60 Hz power so urce .
1. 4 Specifications
The EAS 930A performan ce and ph ysical specifications are listed in Table 1-1.
FM RECEIVER MODULE
Frequency Range
Antenna Input
Sensitivity
Audio Ou tp ut
T.H.D.
AM RECEIVER MODULE
Frequency Range
An tenna Input
Sensitiv i ty
AGC
Audio Output
T.H.D.
Table 1-1
SPECIFICATIONS
88-108 MH z, dig itally
tunable in I
00 kHz steps
750 , Type F connector
2 µV for
20 dB quieting
-1 0 dBm to +3 dBm
(a djustable from rear panel)
6000 balanced, 3-pin
tenninal block
L
ess than 3% at 66 . 6%
modu la tion
5 40 kHz to I 720 kHz,
digitally tunable
in 10 kHz
ste ps
Term inal block connector;
ex ternal AM loop antenna
sup pli ed
20 µV for 20 dB SIN
45 dB
-10 dBm to +3 dBm
(a djustable from r ear panel)
6000 balanced, 3 -p in
terminal bl
ock
Less than 3% at 66.6%
m odulation
WEATHER RADIO RECEIVER MODULE
(Continu ed)
Sensit i vity
Image Rejection
l.F. Rejection
Modulation
Antennna
Audio Output
T.H.D.
1.5 µV for
20 dB quieting
60 dB
70 dB
FM , :t:5 kHz deviation
75 0, type F connect or
-10 dBm to +3 dBm
(a djustable from rear panel)
balanced, 3-pin terminal
block
Less th an 3% at 66 .6%
modu l ation
PHYSICAL AND ENVIRONMENT AL
L.0 . Emissions
Dimensions
Operating Tem perature
Net Wei ght
Shipping Weight
Fully
co mpliant with FCC
Ru les, Part 15
1-3/4" x
!9"W x 12"D
0° to 50° C
Approxim ate ly 6.5 lbs
Approximately 8 lbs
ORDERING INFORMATION
TFT PART NUMBER
5 116- 0930A
DESCRIPTION
FM ,
WEATHER RADIO RECEIVER MODULE
EA S 930A complete
assembly with chassis
po
wer supply and AM
an d Weather Receiver
Mo dul es
NOAA Weather Channel Channel 1: 1
62 .550 MHz
Ch anne l 2 :162. 400 MHz
Ch annel 3 :162.475 MHz
Channel 4: 1 62 . 425 MH z
Chan nel 5: 162.450 MHz
Channel 6: 162.500 MHz
Channel 7: 162.5 25 Mhz
5 102-3969
6608-4037
6608 -40 38
6608- 4 039
Chassis with power supply
and audio monitor speaker
on ly
FM Receiver Module
AM Receiver Module
NOAA Weather Receiver
Modu le
1-3

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1. 5 Warranty Information
The following warranty policy and limitations are applicable to the Model EAS 930A Emergency Alert
SystemMulti-Module Receiver.
WARRANTY
TFT, Inc. warrants each manufactured Model EAS 930A Multi-Module Receiver to meet published
specifications
and to be free from defects in material and workmanship. TFT will repair or replace, at
its expense,
for a period of one (1) year from the date of shipment of equipment, all parts which are
defective from faulty material
or workmanship. This Warranty does not cover equipment which has
been misused and/or
altered by the user. Units found to be defective duri ng the warranty period shall
be returned to TFT with transportation charges prepaid by the BUYER. It is expressly agreed that
replacement
and repair shall be the so le remedy of the SELLER with respect to any non-conforming
equipment
and parts thereof, and shall be in lieu of any other remedy availab le by applicable law. All
returns to the factory
must be authorized in advance by TFT . Upon examination by the factory, if any
EAS911
Equipment is found to be defective, the unit will be repaired and returned to the BUYER with
transportation charges
prepaid by TFT during the warranty period. Transportation charges for the units
found to
be defective within the first 30 days of the warranty period will be paid both ways by TFT.
Transportation charges for warranty returns wherein failure is found not to be the fault of TFT or one
yearafterthe delivery of the equipment shall be paid both ways by the BUYER. This warranty does
notapply to
equipment which , in the opinion of the SELLER, has been altered or misused.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. TFT IS NOT LIABLE FOR
ANY CONSEQUENTIAL DAMAGES.
1.6 Claims for Damage in Shipment
Your instrument should be inspected and tested by the method given in Chapter 3 of this guide as soon
as
it is received. If the instrument is damaged in any way or fails to operate properly due to
transportation
damage, file a claim with the carrier or, if insured separately, with the insurance
company.
OUR EMERGENCY SERVICE IS AVAILABLE 24 HOURS A DAY. PLEASE CALL
US IF YOU NEED ASSISTANCE WITH ANY TFT PRODUCT.
1--4
TFT Inc.
1953 Concourse Drive
San Jose CA 95131
Tel: [phone]
Fax: [phone]

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Chapter 2 - Getting to Know Your EAS 930A
2.1 Unpacking and Inspection
Upon receiving the instrument, inspect th e packing box for signs of shipping damage. Report any
damage to the transportation company.
Open the shipping box, and verify that it
co ntains the following items:
• Model EAS 930A Multi-Module Receiver
• AM Loop Antennawith Base, TFf PIN 2140-7215
• RF PowerSplitter 2:1, TFf PIN 1890-0015
• RFCable Assembly, Type F to Type F, RG59 (2 each ), TFT PIN 4750-0981
• Power Cord
• Installation and Operation
Gu id e, TFf PIN 5004-0930A
• Warranty Card
After unpacking, operate the instrument in accordance with the procedures in Chapter 3 of this guide.
If the instrument is damaged or fails to operate properly due to transportation damage, file a claim with
thetransportation company
or , if insured separately, with the insurance company.
2. 2 Front Panel Controls and Indicators
Receiver front panel controls and indicators are sh ow n in Figure 2-1 . Numbered items in this figure
areexplained
in Table 2-1.
2
01
-
00~0~0~0~0~00
I
oc°
0o
0
oc°c°
0
D
rn .,, EAS930A
ITEM
1
2 VOLUME
3 AUDIO
3 4 s 6 7
..-
... _,,..
..........
---
r:
< ,l,~ ... ~
~
T @~ T~
~
T~ @
0 T l! D
Figure 2-1. Receiver FrontPanel Controls and Indicators
Table 2- 1. Receiver Front Panel Co ntrols and Indicators
TIT LE FUNCTION
Speaker. Produces audib
le output from recei ve r selected via AUDIO
switch {It
em 3)
Potentiometer. Volume control for receiver audio selected
via AUDIO
switch (
It em 3)
5-position rotary switch. Selects the audio output of a receiver for routing
to audio amplifierandspeaker. In the
OFF posit.ion, no receiver audio is
select
ed .
Note :
Power to the Receivers is always ON. The 5-position switch
controls only which receiver audio is routed to the speaker for
monitoring.
2- 1

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ITEM
4
5
6
2-2
Table2-1. Receiver Front Panel Controls and Indicators (Continued)
TITLE
AM RECEIVER
RF&AUDIO
TP1
1 MHz , 100 kHz, 10 kHz
DX/LO
FM RECEIVER
RF&AUDIO
TP1
10 MHz , 1 MHz , 100 kHz
DX/LO
WEATHER RECEIVER
FUNCTION
Note:
Individual Receiver controls are accessible by removing the associated
push-on cover (shown below) from the front panel.
To remove the cover,
push it upward to disengage its rear hooks , then pull gently forward to
remove it from the front panel.
FRONT VIEW
SIOEVlEW
Receiver module for AM broadcast band (540• 1720 kHz)
RF&
AUDIO
Figure 2-2. AM Receiver Module Edge-Mounted Controls and Indicators
Yellow LED. Flashes when an RF signal is detected which is above the
minimum level
of 20 µV and has audiomodulation.
Test point for RF Signal Strength Indication (RSSI) monitoring
Rotary switches
for setting receive frequency
LocaVDistant switch for setting receiver sensitivity
Receiver module for FM broadcast band (88 • 108
MHz )
RF&
AUDIO
Figure 2-3. FM Receiver Module Edge-Mounted Controls and Indicators
Yellow LED. Flasheswhen an RF signal is detected which is above the
minimumlevel
of 10 µV and has audiomodulation.
Testpoint for
RF Signal Strength Indication (RSSI) monitoring
Rotary switches
for setting received frequency
LocaVD
is tant switch for setting receiver sensitivity
Radio Receiver module
for weather broadcasts
(162.400 • 162.550MHz)
'
RF&
AUDIO
- - --
CHANNEL ·· · .. · • ••
---::::._ [i]-=-' _ Lr ...,_ _ -----"" __ ...oB ~~ -=-.=..--
Figure 2-4. Weather Receiver Module Edge-Mounted Controls and Indicators

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Ta b le 2-1. Receiver FrontPanel Controls and Indicators (Continued)
ITEM TITLE FUNCTION
6
RF&AUDIO
Yellow LED. Flashes when an RF signal is detected which is above the
(Cont 'd.) minimum level
of 5 µV and hasaudio modulation.
TP1
Testpoint for RSSI monitoring
CHANNEL Rotary switch
for setting receive channel. See Table 3-1 for weather
channel frequencies
DX/LO Local/Distant switch for setting receiver sensitivity
7 (unmarked)
Slot for additional Receiver Module. Modulecan be any type
2.3 Rear Panel Controls and Connectors
Receiverrear panel controls and connectors are shown in Figure 2-5. Numbered items in this figure
areexplained in Table2-2.
17,
........
I
:::
..---. --c~r-41'., ---i
~ ,.,.,. ...ic.:c 110 '"" APl<I ...aro
• -::0~ . ;_ th•z ff,
--1 -, 1 111 1 111
~ ) <v
I
r.: ,
T
' ' I
~ ~t.t~ > ~
,---. 'Ca~ .. .---.
,---- f'((t!\/Clt I --,
ff ~·~ . ~Q - ~ ft!
"' v,,u, ~t:a ~ ~
« :,,,Vtd.l0 ~ "4~~
~ ~66n666~
I
l®J
---- -
Figure 2-5. Receiver Rear Panel Controls and Co nnectors
Tab le 2-2. Receiver Rear Panel Controls and Co nn ectors
ITEM TITLE FUNCTION
1 RECEIVER4 Controls
and connectors for Receiver 4:
&'
'
I ' .
j,: ' ,j·
! .
t£r ~, 111 : . Ii
01
.,.__.
RF INPUT: Type F connector tor RF inputto the FM and Weatherreceiver
modules, 2 pin terminal block connectorfor
RF inputto the AM Receiver
module.
AUDIO BACKUP IN
PUT : An unbalanced audio signal can be inputto the
receiver. Ifthe receiver loses
RF or modulation, the AUDIOBACKUP
INPUTis switchedto the BALANCED AUDIO OUTPUT.
NOTE:
To activate this feature, refer to 4.2, System Installation.
AUDIO BACKUP OUTPUT: An unbalanced audio outputisprovided to
be
used as the AUDIO BACKUP INPUTto another module.
BALANCED AUDIO OUTPUT: Terminal blockconnectorforbalancedaudio
output to EAS 911
or otherexternal equipment.
ALARM RELAY CONTACTS: The ALARM RELAY CONTACTS areclosed if
the Receiver loses RF or modulation.
2-3

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Ta ble 2-2. Receiver Rear Pane l Cont rols and Connectors (Continued)
ITEM TITLE FUNCTION
AUDIO OUT ADJ: Level adjustment
for balanced audio output. Normally
set to 2.2 Vp-p as measured with an oscilloscope from ground to eitherthe
+ or -terminal.
Controls and connectors
for Receiver3
2 RECEI
VERS
Functions of these items are identical to those for Receiver4
Controls and connectors
for Receiver 2
3 RECEIVER2 Functions ofthese items are identical
to those for Receiver4
Controls and connectors for Receiver 1
4 RECEIVER 1 Functions of these items are identical
to those for Receiver 4
5 120VAC, 1/
4A SB 60 Hz
Prime powerinput connector and fuse holder
2 -4

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Chapter 3 - Pre-Installation Checkout
3 .1 Introduction
This chapter describes EAS 930A Multi-Module Receiver pre-installation checkout procedures. It is
recommended that the user perform these procedures on the EAS 930A on a work bench before its
final installation.
3. 2 System Operation
The unit has two front-panel controls. The AUDIO select switch is used to se lect the audio output of a
receiverformonitoring viathe front panel speaker. The volume of the speaker output is adjustable via
the front pane]
VOLUME control (Figure 2-1 , It em 2).
Controls for receiver modules are edge-mounted
on their main circuit cards. The controls are
accessible by removing the front panel access plate of the module.
Each receiver module has a level adjustment for its audio output (See Figure 2-5). This audio output is
routed to rear-panel terminals (See Figure 2-5), and is separate from that supplied to the front-panel
AUDIO select switch (Figure 2-1, Item 3). Receiver audio selected by th is switch is routed to the
internal speaker/amplifier for local monitoring.
3.3 Selection of Receiver Operating Frequencies
Each recei ve r module has one or more rotary switches for setting its operating frequency. These
switches are shown in Figures 3-1 thru 3-3, and are accessible by removing the receiver 's front panel
access plate (push-on cover).
See Item 3 of Table 2-1 for push- on cover removal instructions.
3. 3.1 Selection of AM Receiver Frequency
The AMReceivercontrols and indicators accessible from the front panel are shown in Figure 3-1. The
receiv
er operating frequency can be set from 540 to 1720 kHz in 10 kHz s tep s via three rotary
switches. The AM receiver frequency should be set to one of the two FCC-assigned EAS stations.
RF&
AUDIO
Figure 3-1. AM Receiver Controls and Indicators
3. 3. 2 Selection of FM Receiver Frequency
The FM Receiver controls and indicators accessible from the front panel are shown in Figure 3-2.
The receiver operating frequen cy can be se t from 88 to 108 MHz in 100 kHz s tep s via three rotary
switches.
The FM receiverfrequency should be set to one of the two FCC -assigned EAS stations.
RF&
AUDIO
Figure 3-2. FM Receiver Controls and Indicators
3-1

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3.3.3 Selection of NOAA Weather Radio Receiver Frequency
The NOAAWeatherRadio Receivercontrols and indicators accessible from the front panel are shown
in Figure 3-3.
The receiver operating frequency can besetto any of 7 discrete channels from 16 2.400
to I62.550
MHz via a single rotary switch as listed in Table 3-1. A listing of the frequency
assignments for the
NOAA WeatherRadio Network can be found in Table 3-2.
RF&
AUDIO
•TP1
A
Figure 3-3. NOAA Weather Radio Receiver Co ntrols and Indicators
Tab le 3-1. NOAA Cha nn el Frequencies
Channel Frea
ue ncv (MHz)
1 16 2.550
2 16 2.400
3 162.4 75
4 16 2.425
5 162.450
6 162 .500
7 16 2. 525
There is no FCC requirement for broadcasters or cablecasters to monitor NOAA Weather stations.
However, since the Weather Radio stations use the same EAS codes, it is an added protection to
monitor these station
s. More than 80% of all alertactivities are weatherrelated according to theFCC
3.4 Pre-Installation Checkout of the EAS 930A
It is recommended that a bench test of the EAS 930A Receiver be performed before final installation.
This will verify that the unit has not been damaged in shipment.
3.4.1 AM Receiver Checks
Connect the loop antenna to the antenna input at the rear panel of the AM Receiver. Check for audio
output from the speaker.
Tune to a strong, local AM station if there is no audio output at the frequency
selected in Paragraph 3.3.1
of this Chapter. The objecti ve is to verify that the AM receiveris operating
properly.
3. 4. 2 FM Receiv er Checks
Perform a confidencecheck of the FM Receiver by repeating the procedures of Paragraph 3.4.1 on the
FM receiver using eith
er an indoor dipole antenna or an outdoor antenna described in Paragraph 4.3.
The objective is to verify proper operation
of the FM Receiver.
3 .4.3 NOAA Weather Radio Receiver Check
Perform a co nfidence check of the FM Receiverby selecting the strongest NOAA Weather Station in
the area.
Use an indoor or outdoor antenna de scribed in Paragraph 4.3
3-2

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Table 3-2.
NOAA Weather Radio Network
Legend-Frequencies are identified as follows :
1. 162 . 550 MHz
2. 162 . 400 MHz
3. 162.475 MHz
4. 162 .425 MHz
5. 162 . 450 MHz
6. 162 . 500 MHz
7. 162 . 525 MHz
Location Frequency Location Frequency
Location Frequency Location Frequency
Alabama
Ca lifornia continued Georgia
continued Kansas continued
Anniston 3
Monterey 2
Chatsworth 2
Dodge City 3
Birmingham
1
Point A.reoa
1 Columbus 2
Elswooh 2
Demopolis
3
Redding (P) 1 Macon 3
Topeka 3
Dozier
1
Saaamento
1 Pelham 1 Wichita
1
Florence
3
San Diego
2
Savannah 2 Kentucky
Huntsville 2
San Francisco 2 •
Valdosta
6
Ashland
1
Louisville
3
San Luis Obispo
1
Watcro5S
3
Bowling Green 2
Mobile
1
Santa Barbara 2 Waynesboro 4
Covington 1
Montgomery 2 Colorado
Hawaii
Elizabethtown ® 2
Tuscaloosa
2
Alamosa (P)
3
Hilo
1 Hazard 3
Alaska
Colorado Springs 3
Honolulu 1 Lexington 2
Anchorage
1
Denver
1 Kokee 2 Louisvile
3
Cordova 1
Fort Collins 5 Ml
Haleakala 2
Mayfield 3
Fairbanks
1
Grand Junction
1 Waimanalo ( P) 2 Pikevle® 2
Homer 2
Greeley 2
Idaho
Somerset
1
Juneau
1
Longmont 1
Boise
1 Louis iana
Ketchilcan 1
Pueblo 2
Lewiston (P) 1 Alexandria 3
Kodiak
1
Stefling 2
Pocatello 1
Baton Rouge 2
Nome
1 Connecticut
Twin Falls 2 Buras
3
Haines
1 Hartford 3
Illinois
Lafayette
1
Seward 1
Meriden 2
Champaign 1
Lake Charles 2
Sitka 1
New London 1
Chicago 1
Monroe
1
Valdez
1
Delawa re Marion
4
Molgan City
3
Wrangell
2
Lewes
Molile 1
New 0!1eans 1
Yakutat
2 Oistriet of
Co lu mbia
Peoria 3
Shreveport 2
Arizona
Washington , D.C .
Rockford 3
Maine
Flagstaff 2
Springfield 2 •
Caribou
7
Lake Powell
1 Florida Indiana •
Dresden
3
Phoenix
1
BellGlade 2
Elsworth
2
• Bloom ington 5
Tucson 2
Daytona Beach 2
Portland 1
Fort Myeis
3
Evansvile 1
Yuma
1
Fort Wayne
Maryland
Gainesvile 3 1
Arkansas
Jacksalvile 1
Indianapolis 1 Baltimore
2
F ayettevllle 3
Key West 2
Lafayette 3
Hagerstown 3
FortSrrith 2
Melbourne
1 •
Marion
5 Salislllly 3
Gurdon
3
M.rri 1
South Bend 2
Massa chusetts
Jonesboro
1
Orlando 3
Terre Haute 2
Boston 3
Little Rock
1
Panama City
1 Iowa
Hyannis
1
Mountain Vte11 2
Pensacola
2 Cedar Rapids 3
Won::ester
1
Star-City
2
Tallahassee 2 Des Moines
1
Michigan
Texarkana
1
Tampa
1 Dubuque (P) 2
Alpena 1
California
West Palm Beach 3
Sioux City
3
Detro it 1
Bakeisfield (P) 1
Georgia
Water1oo
1
Flint 2
Coachella (P) 2
Athens
2
Kansas
Grand RaP4ds
1
Eureka
2
Atlanta
1
Chanute 2
Houghton 2
Fresno
2
Augusta 1
Colby 3
Marquette
1
Los Angeles
1 •
Baxley
7
Concordia 1
Lindsay 6
3-3

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Location Fr!!juencv Location
F~uencl
Location
Fr!!jUtn~
Location F
!:!!I ut!?9'.
Michigan continued
New Mexico
Penn s ylvania continued
U .S. Virgin Islands
• Onondaga
2
Albuquerque 2
Erie 2 •
St Thomas
3
Sault Sainte Marie
1
CM 3
Harrisburg 1
Traverse City
2
Des Moines
1
Johnsto wn 2
Utah
M in nesota
Farmington 3
Philadelphia 3
Logan 2
Pittsburgh
1
Cedar City 2
Detroit Lakes
3 Hobbs 2 State
College
3
Vernal
2
Duluth
1 Las Cruces 2 •
Towanda
3 Salt
Lake City 1
International Falls 1 Ruidoso
1
Mankato 2
Santa Fe 1
'W ellsboro
1
Vennont
Minneapolis 1
Wikes-Sane
1
Burlington 2
New Yortt
Wiliamsport 2 •
Marlboro
4
Rochester 3
Albany 1
Windsor 3
Saint Cloud (P)
3
Binghamton
3
Puerto Rico
Thief River Falls
1
Buffalo
1
Maricao 1 Virginia
Wlna(P) 2
Emra 2
San Juan 2 Heathsville 2
Miss issi ppi Kingston 3 Rhode Island
• Kynchburg
1
Acllerman
3 New YOl1\ City 1 Providence 2
Norfolk 1
Booneville 1 • Rivemead 3
South Carolina
Richmond 3
Bude 1 Rochester 2
Beaufort 3
Roanoke
2
• Columbia
2 Syracuse 1
Charleston 1
Washington
Gulfport
2
North Carolina Columbia 2
Neah Bay 1
Hattiesburg 3
AsheYile
2 Cross
3
~
3
lnvemess 1 C8pe
Hatteras 3 Florence 1
Seattle 1
Jackson 2
Charlotte 3
Greenville 1
Spokane 2
Meridian 1
Fayetteville 3 M'jrtleBeach 2
Wenatchee
3
Oxford 2
New Bern 2 Sumter(R) 3
Yakima 1
Missouri
Raleigh/Durham 1
South Dakota
West Virginia
Columbia 2
Rocky Mount
3
Aberdeen
3
Beckley 6
Camdenton
1 WIimington 1
Huron 1
Charleston
2
Hannibal 3 Wl!ISton-Salem 2
Pierre 2
Clar11sburg 1
Hermitage 5
North Dakota Rapid city 1
Gilbert 7
Joplin/Carthage 1
Bismalt:k 2 Sioux Falls 2
Hinton 4
Kansas City
1
Dickinson 2
Moorefield
7
St Joseph 2
Fargo 2
Tennessee
Spencer
6
St Louis 1
Bristol 1
Sutton 5
Jamestown 2
Chattanooga 1
Sikeston 2 2
Springfield 2
Minot
Cookeville 2
Wisconsin
Petersburg 2
Jac:lcson
1
La Crosse (P) 1
Montana Wilism
2
Knaxvile 3
Green Bay 1
~
1
Ohio Memphis 3
Madison 1
Butte
1
Akron 2 Nashville 1
Menomonie 2
Glasgow
1
Cambridge 3 Shelbyvile 3
Milwaukee 2
Great Falls
1
Cleveland 1
WfM!ft'/
2 •
Parlt Falls
6
Havre (P ) 2
Columbus 1 Texas
Wausau
3
Helena 2
Dayton
3 Abilene 2 Wyom i ng
Kaispell 1
Lina
2 Amarilo 1 Casper
1
Mies City 2
Sandusl(y 2 Austin 2 Cheyenne 3
Missoula 2
Toledo 1
Beaumont 3
Lander
3
Nebraska
Oklahoma
Big Spring 3
Sheridan (P) 3
Bassett 3
Clinton
3
Brownsvie 1
Grand island
2
Enid
3
Bryan
1
Notes :
Holdrege 3
Lawton 1
COfPUS Christi 1
Lincoln
3
McAlester 3
Dallas 2 I.
S-~~an~ n .-elunoed
Merrinan 2
Oklahoma City
2
Del Rio (P) 2
p,.,. i- groups.
Norfolk 1
Tulsa 1
EIPaso 3
North Platte
1
Oregon
Forth Worth 1
2. Stllions mated• n loW powtfed e,q,erimentll
Omaha 2
Galveston 1
..-saa1ons ~ averyimadkal area.
Scottsbluff 1
Ast>ria 2
Houston 2
~
1
Laredo 3
3. Slalions mat:ed (P) oper.- less than 24 holnlday
Nevada
Coos Bay 2
Lubbock 2
Ek>
1
Eugene 2
r- ,hclnnellllndld""9npcl$sillle
e, 2
Lufkin 1 dlling se-e,e
...- .
Klamath Fals 1
Midland 2
Las Vegas 1
Medford 2
PMS 1
Reno 1
Newport 1 4
Oc:calicNly the~ d., uislng o, pla,ned
Winnemucca 2
Pharr 2
mtiorllTIISlbedlar,gedbecaused~
Pendleton 2
San Angelo 1
mo lrequency inlelferlftCII willl ~ NOAA
New Hampshire Portland
1
San Antonio
1
w- Radio S1lb'4 and/or wiUl olller
Concord 2 Roseburg 1
Sherman
3 gooie,m,enlOf
corrmen:ial q,era:n ~ 11,t
New Nmey
Salem 3
Tyler
3
area .
Atlantic City 2
Pennsylvania Vldoria 2
Allentown 2 Waco 3
Clearfield 1 WIChita Falls 3
3-4

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Chapter 4 - Installation and Operation
4. 1 Introduction
This chapter describes EAS 930A Multi-Module Receiver system installation procedures to be
performed after theunitpasses the pre-installation checkout described in Chapter 3.
4.2 Model EAS 930A System Installation
The EAS 930A Receiver requires connections to antennas as shown in Figure 4-1. The 930A also
requires connection to prime power. The receiver audio outputs are typically connected to the
TFf
Model 9 11 Emergency Alert System Decoder 's audio inputs.
If the receivers are to be used in a hot standby configuration, the AUTO SWITCH strap on the receiver
must
be placed in the ON position. Remove the top cover of the EAS 930A to gain access to this strap
on the module. On the rear panel
of the EAS 930A, connect the AUDIO BACKUP OUTPUT of the
backup receiver to the AUDIO BACKUP INPUT
of the primary receiver. If the primary receiverloses
RF or modulation, the backup receiver will be switch ed to the output of th e primary receiver. The
ALARM RELAYoutput provides a set
of closed co ntacts if the receiverloses RF or audio, and can be
used for alarm monitoring purposes.
CA:Bl.E A$.'.s£ " 3t. v, R'GS'!.' w'!7J-I • TC ' •~PE
~EC-rDF:: ((750-~8!
:-~ •~ -\i/0-\.IA~ ANi£~'\IA SF._:- - ~
< :sc,a-oo:s,
Figure 4-1. EAS 930A RF Input Connections
4-1

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4. 3 FM and NOAA Weather Radio Antenna Installation
The fM and NOAA Receivers can typically share an outdoor VHF antenna. The antenna output is
applied
to an FM/fV 2-way signal sp litter whi ch is supplied with the EAS 930A. The type of VHF
antenna can be a Radio Shack VHF/FM Stereo antenna, Part No . 15-2158 or Part No. 15 -2 164 for
shorter receivingdistances.
The splitteroutputs are fed to the EAS 930A FM and NOAA Receiver inputs. If an additional FM or
NOAAReceiver module is installed in theReceiver, a second signal splitter may be inserted in one leg
of the first sp litter output to provide three RF connections to the Receiver.
4.4 AM Antenna Installation
In high or moderate signal strength areas, the AM Receiver may operate satisfactorily using the indoor
loop antennasupplied with the EAS 930A.
In weaker signal strength areas, an outdoor antenna may
be required. An end-fed long-wire antenna (approximately 250 ft.) can be used with good re sults.
One end of the long wire should be connected atthe rear panel AM Receiver module's RF INPUT.
4. 5 Received Signal Strength Indication (RSSI)
Test Point TPl locat ed next to the frequency selection switches on each receiver module is the RSSI
voltage
of the receiver. The characteristics of the RSSI vs. the RF signal level at the input of the
receiver is s
hown in Figures 4-2 , 4-3 , and 4-4 for the FM , NOAA Weather , and AM Re ceiver,
respectively.
40V
.....
..,,.
...., ...,,
..., , ...
,o_v IOlfV 100pY 200.,rt' 2.,V
101,N IOIN 10011" 2001,N 10t,aV ZOpV 1GID., V
RF INPIIT AT Jl
RF INPIIT AT J1 RF INPUT AT Jl
Figure 4-2 Figure 4-3 Figure 4-4
FM Receiver RSSI vs. RF Input NOAA Recei ve r RSSI vs. RF Input AM Receiver RSSI vs. RF Input
For reliable reception, the signal le ve l from the antenna feed line must be high enough to provide an
RSSI voltage greater than the values given below.
FM Receiver
NOAA Receiver
AM Receiver
> 1.9 voe
>6.1 voe
>2.I voe
The LOCAUDIST ANT switch s hould be set to the DX (Distant) position unless the RSSI exceeds the
values given below:
4-2
FM Receiver
NOAA Receiver
AMReceiver
>3.8 VDe
>6.4 voe
>3.2 voe