Moseley MRC2 User manual

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•
•
ISO
W//11
Technical Manual
MRC2
MICROPROCESSOR
REMOTE CONTROL SYSTEM
VOLUME
ONE
Revised
August
1994
7A0260 Rev.
F
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Copyright© 1994 by Moseley Associates, Inc.
All tights reserved
MRC 2 Volume One
Revision Configuration: Manual Doc. #7A0260 Rev. F
Section DWG
REV
Table of Contents
7A0260 E
1 7A0260 E
2 7A0260-2 F
3 7A0260 E
4 7A0260-4 F
5 7A0260-5 F
6 7A0260 E
7 7A0260 E
8 7A0260 E
Appendix 7A0260 E
REVISED/RELEASED
AUG90
AU G90
AUG94
AUG90
AUG94
AUG94
AUG90
AUG 90
AUG 90 •
AUG90
•

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•
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WARRt\NTY
All equip ment dcsigr.eda nd manufactured by M os eley Ass ocia 1es. Inc. LS warramed agamsr defeccs
in workmanship and rnaten.J tha: develop under nom1al u se w11h1n ;:i period of ( ::! ) years fr om the date of
or
iginal shipmen:. and 1s also warranted to meet any spec1ficadons represenred in w ri 11n g by Moseley
Associates. Inc..
so long as the purchaser i~not in default und er his contract of purchase and subJect lO the
fo
ll owing add 11 1o na l co ml1t1ons and lim1ta t1 ons:
I.
The so le re spo nsibili ty of M oseley Ass oc iates. [nc. for any c:qu1pment not c onforming to this
Warr:mty sna ll be. at it5 opt;on:
'\ 10 rc:patr or re pi ace such equ ip ment or otherwise c ause" to meet the represenccdspecifications
e1:he~at the purcha
se r' ~ insta ll ation or upon the rerurn thereof f.o .b . S.inca Barbara. California. ::.s
directed by Mose ley Ass oc iates. lnc .: or
B. to a
ccep rthe return thereof f.o. b. Sant.a Barbara. C al ifo rni a. credit the p ur chaser 's accoun t for
the unpaid pL'rnon. if
an~ . of the pu rchase price. and refund to the purchase r. without : mere st, an;
ponilln of the pur chase pr ice th crewfo re paid: or
C co demonstrate that tne equipment has no def ec t in workmanship or m:uenal and tna, a meets
ihe rcprt s emed specification. in which event all expenses re:isonably inc urre d by Moseley Associ-
ates. in c.. in so 1. i:!m onstra ting. inciuding but n o1 limi1ed to coses of t ra vel to :mcl from the purc:i aser ·$
inst3.l!au
on . :rnd subsis ten c e: . s ha ll oe pall.I by purcha~er to Mo sele:, Assoc :ate s. lnc.
~ In c ase of any equ ipme nt thought to be defective. the purchaser sha ll promptly notify Mos eley
Assoc1:ues. Inc.. in
writing. givi ng full pa rtic ular s as co th e dcf ec.:tS Upon re ceipt oi such notice. Mo~eley
Associate:..
ln c. will give instruc tions respecting the shipment of t he equipment. or ;u ch oth<!r rnanne~ as i1
el<!c ts tO service th is \Varr:m ty as above providec!.
3 Thi s Warramy extends only ,o theoriginai purc h aser a nd 1s nm assignable or tran sferable. du<!S
not ext en d to an y shi pmen t which ha s be en subjected 10 abuse. misuse. physica l d a.r.Jl!g:: . alter:itioi~. oper:1tion
un de r imp r oper conditions or improper 111scaJlation. use ur mainten ance . and doe s noc ex tend to equipment or
pares nm man ufactured by Mose l ey Associa te ~. Inc. and such equ i pm1;:nc anc! pans an: subject to on ly
adjustment s as are available from the manufacturer thereof.
J NO OTHER WARRANTI ES. EXPRESS OR IMPLLED, SHALL BE APPUCABLE TO ,<\NY
EQUJ PME~T SOLD BY MOSELEY ASSOC IATES. IN C. AND NO REPRESENTATlVE OR OTHER
PERSON IS AUTHORIZED BY MOSELEY ASSOClATES. IN C. TO ASSGME FOR LT ANY LIABILITY
OR OBLIGATI ON WITH RESPECT TO THE COND ITION OR PERFORMAN CE OF A:-,./Y EQUIPM ENT
SOLD BY IT. EXCEPT AS PROV IDED lN THIS WARRANTY. THIS \Y.A.RRA~TY PROVIDES FOR THE
SOLE RIGHT AN D REMEDY OF THE PURC HASER AND MOSELEY ASSOC IA TES, IN C. SHALL IN
NO EVE NT HAVEAt,;'Y LlAB[LlTY FOR CONSEQUE NTIAL DAMAGES OR FOR LOSS. DAMAGE OR
EXPENSE DIRECTLY OR lNDIRECTLY ARISING FROM THE USE OF EQC I PMENT PURCHASED
FROM MOSELEY ASSOCIATES INC.
MRC-2 Vol. i
7A0260 Rev.E
+0,87
Pnnted 1n \J..S;:.

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WARNING
This equipment generates, uses and can radiate radio frequency energy and if not
insralled and used in accordance with the insouction manual, may cause interlerence to
radio communications.
It has been rested andfound to comply with the limits of FCC
rules which are designed to provide reasonable protection against such interference when
operated in a commercial environment. Operation
of this equipment in a residential area
is likely to ca.use interference in which case theuser at his own expense will be required
to take whatever measures
may be required to correct the interference.
Note: Allperipherals connected to this equipment, for example VDTs. printers, etc.,
must be connected with shieldedcables tomaintain this compliance.
MRC-2 Vol. 1
7A0260 Rev.E ii
•
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~
Section
Volume One
Table of Contents
Warranty and Claims
FCC Part 15 Warning
Table of
Contents
List of Illustrations
List
of Tables
Glossary
Manual Introduction
1 SYSTEM CHARACTERISTICS
1.1 Introduction
1.2 System Overview
1.3 system Specifications
1.
3.1 MRC-2 Specifications
1.3.2 Analog Input
Ill Module
1.3.3 Status Input,
TT L II Module
1.3.4 Status Input, Opto II Module
1.3.5 Open Collector,
Command Output Module
1.3.6 Command Output. Optically Isolated Module
1.3.7 CPU Interface Module
1
.3.8 Options
1.4 Hardware Overview
1.4.1 Bus Architecture
1.5 Software Overview
1.5.1 Remote Terminal
1.5.2
Data Acquisition and Control Units
1.5.3 Control Terminals
2 INSTALLATION
2.1 Introduction
2.2
Unpacking
2.3 Preinstaflation
Checkout
2.4
Preinstallation System Checkout
2.4.1 Modem -
Telco lnteriace
2.4.2
Subcarrier Interface
2.4.3 Telco/S ubcarrier Interface
2.5 Site Selection
2.5.1 Dial- up lnit ializaion Options
MRC·2 Vol. 1
7A0260 Rev.E iii
Page
ii
iii
ix
xiii
xiv
xv
1-1
1-1
1-4
1-4
1-7
1-7
1-7
1-8
1-8
1-8
i-8
i - 10
1 -14
1-17
i-i?
1-17
1-18
2-1
2-1
2-3
2-4
2-4
2-5
2-7
2-7
2-9

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Section
2.6
Physical Installation
2.7 Interconnections
2.7.1
Phone Line Connection, 4-Wire
2.7
.2 Phone Line Connection, 2-Wire
2.7.3
FM
Subcarrier Interconnect
2.7.4
Mixed Communications
2.7.5 System Adjustment
2.7.6 Audible Alarm
2.8
Control Failsafe
2.9 Telemetry Failsafe
2.10
Maintenance Override
2.11 lnpuVOutput Connector
2.12
Installation Completion
3 OPERATION
3.1
3.2
3.3
3.4
3.5
3.6
MRC-2
Vol. 1
7A0260
Rev.E
Introduction
3.1.1 Front Panel
OPERATIONS Mode
3.2.1 Power-Up Display
3.2.2 OPERATION Mode Function Keys
3.2.3 OtherKeys
3.2.4 LEDs
SETUP Mode
3.3.1 SETUP Mode Function Keys
Command Set-Up
Telemetry (Analog)
Set
-Up
3.5.1 Calibration
3.5,2 Limit
Reset
Band
3.5.3 Red and Yellow Limits
3.5.4 Alarms. Events
and
Muting
3.5
.5 Telemetry Commands
Status Set-Up
3.6.1 Status Attributes
3.6.2 Status Alarms and Events
3.6.3 Status Muting
3.6.4 Status Commands
iv
Page
2-10
2-10
2-10
2-10
2-
10
2-10
2-10
2-11
2-11
2-
12
2-12
2-13
2-14
3-1
3-1
3-4
3-4
3-4
3-5
3-5
3-6
3-6
3-6
3-8
3-8
3-16
3-17
3-18
3-19
3-21
,
, 3-21
3-22
3-22
3-23

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Section
3.7 Remote Terminal Site
Se t-Up
3.7.1 Control Failsafe.
and Security Code
3.7.2 Dial-Up
Modem Telephone Numbers
3.7.3
Communica tion Link
3.7.4
Telemetry Failsafe
3.7.5
System Configuration
3.7.6 MSD-1
Option Set-Up
3.7.7
MDC-2 Option Set-Up
3.7.8
RT Dial-Up Workshi?i?t HA" Instructions
3.8 Additional Operations
3.8.1
Sta tus Clear
3.8.2 Limits Enable
3,8.3
Acknowledge Alarms
3.8.4 Alarm Search
3.8.5 Maintenance
Override
3.8.6
RAISE/ON and LOWER/OFF
3.8.7
Telemetry Display
3.8.8 Status Display
3.8.9
Command Display
3.8. 10
Channel Zero For Remo te Terminal
3.8.11 Erasing File
Memory
3.8.12 Full Fiie
Memory
3.8.13 Expanding File
Memory
3.9 Failsafe Conditions
3.10
Control Terminal Versus Remote Termina l
3.10.1 Introducti
on
3.10.2
OPERATIONS Mode
3.10.3
SETUP Mode
3.10.4
Telemetry Set-Up
3.10.5 Site Se t- Up
3.10.6 System Set-Up
3.10.7 Additional Operations
3.10.8 Failsafe Conditions
3,10.9 Multi-Control
Terminal Operations
4 MODULE
CHARACTERISTICS
4.1
4.2
4.3
4.4
4.5
4.6
MRC-2 Vol. 1
7A0260 Rev.E
Introduction
Main
Front Panel
6809 CPU Module
CPU Interface
96K ROM Board
32K RAM Board
V
Page
3-23
3-23
3-24
3-24
3- 25
3- 26
3- 27
3-28
3-29
3- 30
3-30
3-30
3-30
3-31
3-31
3-32
3-32
3.33
3-34
3-34
3-36
3-36
3-36
3-37
3-37
3-37
3-37
3-39
3-39
3-39
3-43
3-45
3-47
3-47
4 -1
4-1
4.3
4-5
4-8
4-9

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~
~- -·
Section
4.7
4.8
4.9
4.10
4.11
4.t2
4. 13
4. 14
4.15
4.16
4.17
4.18
4.19
4.20
4.21
4.22
4.23
4.24
4.25
4.26
4.27
4.28
4.29
4.30
4.31
4.32
MRC-2 Vol. 1
7A0260 Rev.E
Page
File MemoryController
4-10
File Memory Extension
4-12
GPIB-488 Module 4-13
GPIB-488 Interface
4-15
Modem II Module
4-15
Modem-Telco Interface
4-16
Telco ln/Subcarrier Out
4-17
Telco Out/Subcarrier In 4-17
Subcarrler Interface
4-18
Serial 1/0 Module
4-18
Serial Interface Module
4- 19
Ana log Input flI
4-20
Status Input, TTL II
4-2i
Status Input, OPTO II 4-21
Open Collector Command Output 4-22
Optically Isolated Command Output
4-22
Parallel Input Module
4- 23
Delay Control 4-
26
Diode-Filtered Interface H 4-
27
Filtered Interface 4- 28
DC Power Supply
4- 28
Extender Board
4- 28
4 RU Mother Board
4-29
Cable Assemblies 4-29
Quad Serial 1/0 Module 4-30
Quad RS-232 Interface Module 4-31
vi

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Section
5
ALIGNMENT
PROCEDURES
5.1 Introduction
5.2
Handling
CMOS
Devices
5.3
Module
Address and
Opt
i
on
Switches
5.4
Fault Isolation -Level 1
5.5
Fault
Iso
la
tion -Level 2
5.6 Suggested Test
Equipment
5.7
Module Adjustments
and
Troubleshooting Information
5.7.1 Main
Front
Panel
5.7
.2 6809
CPU
Module
5.7.3
CPU
Interface
5.7.4
96K
ROM
Board
5.7
.5
32K
RAM
Board
5.7.6 Fi
le
Memory
Controller
5.7.7 File Memory Extension
5.7.8
GPIB-488
Modul
e
5.7.9
GPIB-488
Interface
5.7.10
Modem
II
Module
5.7
.
11
Modem
-
Telco
Interface
5.7.12
Telco
ln/Subcarrier
Out
5.7.13
Telco
Out/Subcarrier
In
5.7
.
14
Subcarrier Interface
5.7.15
Serial 1/0
Module
5.7.16
Serial Interface
Module
5.7
.1
7
Analog
Input
Ill
5.7.18
Status Input,
TTL
ll
5.7.19
Status Input,
OPTO
I!
5.
7.20
Open
Collector
Command
Output
5.7.21 Optically I
solated
Command
Output
5.7
.
22
Parallel Input
Module
5.7.23
Delay
Con
trol
5.7.24
Diode-Filtered Interface
ll
5.725
Filtered Interface
5.
7.
26
DC
Power
Supp
ly
5.7.27
Exte
nd
er
Board
5.7.28
4 RU
Mother
Board
5.7.29
Quad
Serial 1/0
Module
5.7.30
Quad
RS-232
Interface
Module
6
CUSTOMER
SERVICE
INFORMAT
I
ON
7
RECOMMENDED
SPARES
MRC-2 Vol. 1
7A0260 Rev.E
vii
Page
5-1
5-1
5-1
5
-3
5-4
5-10
5
-10
5-10
5-13
5-14
5-15
5-16
5-17
5-19
5-20
5-21
5-22
5-28
5-28
5-29
5-30
5-31
5-32
5-33
5-34
5-34
5
-35
5-36
5-37
5-37
5-38
5-39
5-39
5-
40
5-40
·5-40
5-41

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,----..._,
Section
8 PARTS LIST
Main Front Panel (2002804)
6809 CPU (20D2793)
CPU Interface (20C2781)
. 96K ROM (20D2929)
32K RAM (20D29~0)
File
Memory Controller (20D2789)
File Memory Extension (20D2790)
GPIB-488 (20D2791)
GPIB-488 Interface (20D2792)
Modem fl (2002787)
Modem-Telco Interface (20D2716)
Telco ln/Subc arrier Out (20A2737)
Telco Out/Subcarrier In (2082736-1)
Subcarrier Interface (20D2719-1)
Serial 1/0 (20D2800-1)
Serial In terface (20C2803)
Analog Input Ill (20D2897)
Status Input, TTL (20D2798)
Opto Status 11 , Opto II (.2002795)
Command Output, Open Collector {20D2755)
Command Output. Optically Isolated (20D2705)
Parallel Input (20028 22)
Delay Control (20D2801)
Filtered Interface (2082718)
DC Power Supply (21 D2655)
Mother Board (20D2706)
Quad Serial 1/0
Quad RS-232 In terface
APPENDIX
MRC-2 Vol. 1
7A0260 Rev.E
(See List of Illustrations)
viii
Page
8-2
8-4
8-6
8-9
8-10
8- 11
8-14
8-16
8-17
8-18
8-22
8-24
8-26
8-30
8-34
8-35
8-37
8-39
8-40
8-41
8-42
8-44
8-45
8-47
8- 48
8-50

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F
igure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
3-1
3-2
3-3
3-4
3-5
3-6
3-7
List
of
Illustrations
Typical Single Control Terminal
System
Interconnect
Typical Multiple Control Terminal
System
Interconnect
Functions
of
the
Three
Primary
Units
of
a
MRC-2
System
Control Terminal
Block
Diagram
Remote Terminal
Block
Diagram
DACU
Block
Diagram
MRC-2
Terminal Construction
Module
Positions
2-Wire
Telephone
Line Interconnections
Between
Modem-Telco
Interface
Modules
4-Wire
Telephone
Line Interconnections
Between
Modem-Telco
Interface
Module
Interconnections
Between
Subcarrier
Interface
Modules
Interconnections Between Multiple
Subcarrier
Interface Modules
Telco/Subcarrier Interconnections
Configuration Switches
Audible
Alarm
Connections
Typical Failsafe
Output
Typical
Maintenance
Override
Connection
MRC-2
Control
Termina
l
MRC-2
Remote
Term
ina
l
Examples
of
Interconnections
Between
Control
Terminals
and
Remote
Terminals
Summary
of
SETUP
Modes
for
the
Remote
Terminal
Summary
of
SETUP
Modes
for
the
Control Terminal
RT
Dial-Up
Worksheet
"A"
CT
Dial-Up
Worksheet
"A"
MRC-2
Vol.
1
7A0260 Rev.E
ix
Page
1-2
1-2
1-3
1-11
1-12
1
-13
1-14
2-2
2-4
2-5
2-5
2-6
2-7
2-8
2-11
2-12
2-13
3-2
3-3
3-48
3-52
3-53
3-54
3-55

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,,,..---.....,;
Figure
3-8
CT Dial-Up Worksheet "B"
4-1 Digital Circuit Interface
4-2
RF Filter Circuit
4-3
2-Wire Interconnections for Modem-Telco Interface Modules
4-4
4-Wire Interconnections for Modem-Telco Interface Modules
4-5
Timing for Signal Unes C1 and C2
5-1
Simulated 30 dB Phone line
5-2
Two-Wire Test Interconnect
5-3
Four-Wire Test Interconnect
5-4
Mixed Subcarrier and Telco
5-5
Subcarrier Interconnect
5-6
Location of Modem ll Controls and Test Points
5-7
Standard Subcarrier Pattern
A-1
Front Panel Schematic
A-2
Front Pane l Assembly
A-3
6809 CPU Module Schematic
A-4
6809 CPU Module Assembly
A-5
CPU Interface Schematic
A-6
CPU Interface Assembly
A-7
96K ROM Board Schematic
A-8
96K ROM Board Assembly
A-9
32K RAM Board Schematic
A-10
32K RAM Board Assembly
A-11 File
Memory Controller Schematic
A-12 File Memory Controller Assembly
A-13 File Memory Extension Schematic
MRC-2Vol. 1
7A0260 Rev.E X
Page
3-56
4-7
4-8
4-16
4-16
4-24
5-23
5-23
5-23
5-24
5-24
5-27
5-27
A-2
A-3
A-4
A-5
A-6
A-7
A-8
A-9
A-10
A-11
A-12
A-13
A-14

www.SteamPoweredRadio.Com
Figure
A-14
File Memory Extension Assembly
A- 15
GP!B-488 Module Schematic
A- 16
GPIB-488 Module Assembly
A- i7
GPIB - 488 Interface Schematic
A-18
GPIB - 488 Interface Assembly
A-19
Modem II Module Schematic
A-20
Modem II Module Assembly
A-21
Modem Telco Interface Schematic
A-22
Modem Telco Interface Assembly
A-23
Telco Jn /Subcarrier Out Schematic
A-24
Telco !n/Subcarrier Out Assembly
A-25
Telco Out/Subcarrier In- Schematic
A-26
Telco Out/Subcarrier In Assembly
A-27
Subcarrier Interface Schematic
A-28
Subcarrier Interface Assembly
A-29
Serial l/0 Schematic
A-30
Serial 1/0 Assembly
A-31 Serial Interface Module
Schematic
A-32
Serial Interface Module Assembly
A-33
Ana l og Input 111 Schematic
A-34
Ana log Input Iii Assembly
A-35
Status Input, TTL II Schematic
A-36
Status Input, TTL II Assembly
A-37 Status Input,
OPTO ll Schematic
A- 38
Status lnput;OPTO II Assembly
A- 39 Open Collector Command Output Schematic
A-40
Open Collector Command Output Assembly
MRC-2 Vol. 1
7A0260 Rev.E
xi
Page
A-15
A-16
A-17
A-18
A-1.9
A- 20
A-21
A-22
A-23
A-24
A-25
A- 26
A- 27
A-28
A-'29
A-30
A-31
A-32
A-33
A-34
A-35
A-36
A-37
A-38
A-39
A-40
A-41

www.SteamPoweredRadio.Com
Figure
A-41 Optically Isolated Command Output Schematic
A-42
Optically Isolated Command Output Assembly
A-43
Parallel InputModule Schematic
A-44
Parallel InputModule Assembly
A-45
Delay
Con
trol Schematic
A-46
Delay Control Assembly
A-47 Diode-Filtered Interface
II
Schematic
A-48
Diode-Filtered Interface
II
Assembly
A-49 Filtered Interface Schematic
A-50
Filtered Interface Assembly
A-51 DC
Power
SupplySchematic
A-52
DC
Power
SupplyAssembly
A-53
Extender Board Assembly
A-
54
4 RU MotherBoard Schematic
A-55
4 RU Mother Board Assembly
A-56
Quad
Serial 1/0Schematic
A-57
Quad
Serial 1/0 Assembly
A-58
Quad
RS-232 Interface Schematic
A-59
Quad
RS-
232
Interface Assembly
A-60
25M-25M
Null Modem Cable Assembly
A-61
25M-25F
Null Modem Cable Assembly
A-62
25M-25M ModemCable Norm Assembly
A-63
25M-25M
Modem Cable 4x20 Assembly
A-
64
9F
-
25M
Modem Cable Norm Assembly
A-65
9F-25M Modem Cable 4x20 Assembly
A-66 9F-25M Null Modem Cable Assembly
A-67
9F-25F Null Modem Cable Assembly
A-
68
9F-9F Null Modem Cable Assembly
MRC-2
Vol.
1
7A0260 Rev.E xii
Page
A-42
A-43
A-44
A-45
A-46
A-47
A-48
A-49
A-
50
A-51
A-52
A-53
A-54
A-55
A-56
A-57
A-58
A-59
A-60
A-61
A-62
A-63
A-64
A-65
A-66
A-67
A-68
A-69

www.SteamPoweredRadio.Com
, ,,............,
L ist of Tables
Table
1-1
MRC-2 Bus Architecture
2-1
Remote Terminal Site Selection Switches
2-2
T enninal Configuration Switches
2-3 Command Worksheet
, 2-4 Status
Worksheet
2-5 Telemetry Worksheet
2-6 Input and Output -Connections
3-1 Telemetry Unit Selection
3-2 Remote Tennina~Serial Board Assignment
3-3 Control Terminal
Data Link Assignment
4-1 · 96K ROM Board Address Range
4-2 IC Address Range
4-23 Parallel Input Cables
4-3 Diode-Filtered Interface Pin
Connections
4-4
Pins U1-U3 'Triggered Relays
4~5
Pins U1-_U3Outputs
4-6 Cable Assemblies
5-1 HEX and DIP Swi tch Settings
5-2
MRC-2 Module Configuration
5-3 Power Supply PIN Connections
5-4
Telemetry Channer ~B" Inputs and "OK Outputs
MRC-2 Vol. 1
7A0260 Rev.E xiii
Page
1-15
2-8
2-8
2-14
2-15
2-16
2-17
3-10
3-25
3-49
4-9
4-9
4-25
4-26
4-27
4-27
4-30
5-2
5-5
5-32
5-38

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A/DFC
ASCII
BCD
CMOS
CPU
CRT
DIA
DACU
EAROM
EPROM
FSK
GPIB
IC
LED
MAI
Modem
NC
NO
PROM
PSTN
RAM
ROM
RX
SCA
Telco
Telemetry
THO
TTL
TX
MRC-2 Vol. 1
7A0260 Rev.E
GLOSSARY
Analog to digital
American Standard
Code for Information Interchange
Binary-coded decimal
Complementary metal-oxide semiconductor
Central processing unit
Cathode ray tube
Digital to analog
Data Acquisition and Command Unit
Electrically alterable read-only memory
Erasable programmable read-only memory
Frequency shift keying
Genera! purpose interface
bus
Integrated circuit
Light~emitting diode
Moseley Associates Inc.
FSK MOdulator/DEModulator
Normally closed
Normally open
Programmable read
only memory
PublicSwitched Telephone Network
Random-only memory
Read-only memory
Receive or Receiver
Subsidiary communications.authority
Te!ephone Company
Refers either to metering samples and functions or to signals from
the Remote Terminal to the Control Terminal.
Total harmonic distortion
Transistor-transistor
log ic
Transmit
or Transmitter
xiv

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MANUAL
ORGANIZATION
The MRC-2 manufactured by Moseley Associates Inc.. is a modular microprocessor-
based system, which can monitor and control many types of equipment, including radio
and TV transmitters.
The MRC-2 manual is divided into two volumes. Volume 1 is a comprehensive guide
with information on installation. operation, theory
of
operation, alignment procedures for
customer troubleshooting and repairs, module descriptions, schematic and assembly
drawings, and part lists.
Volume 2 is installation and operating instructions for each MAC-2 option available.
If y
ou
are not familiar with the basic use of the instrument and want more detalled
information, please read Sections 1 through 3 before installing the MRC-2.
Section
1,
System
Characteristics, is -a brief overview of the MRC-
2.
It includes
specifications on the MRC-2 system; Analog Input module, Status Input
TTL
ti
module,
Status Input Opto
II
module, Command Output Open Collector module and Command
Output Optically Isolated module. It also describes the bus structure and provides a
software over-view.
Section
2,
Installation,
covers unpacking, preinstallation system checkout procedures
and install
at
ion.
Section
3, Operation, discusses the controls and adjustments tor the MRC-2 that the
user will encounter
in
normal operati
on
and initial set-up. Also included is front panel
set-up instructions for Dial-Up, MSD and MDC options. ·
Section
4,
Module
Characteristics, is a detailed analysis
on
the theory of operation for
each module component. Schematic, assembly and part lists for each module
description are located
in
the appendix.
Section
5,
Alignment
Procedures,
covers system performance checks and customer
adjustments
that
are used to service and maintain the MRC-2. This section also covers
recommended test equipment for each alignment procedure and troubleshootir:ig
gu
ide.
Section
6,
Customer
Service
Information,
describes general procedures for customer
assistance
by
telephone consultation, field repair
or
return
of
equipment.
Section
7,
Recommended
Spares, includes optional spare parts kits, and information
on complete module replacements.
Section
8,
Part
List, contains
part
intorma
tion
on
a
ll
MRC-2 modules.
Appendix
, contains schematic and assembly drawings refered to
in
Sections 4 and 5
of
Volume One.
MRC-2
Vol.
1
7A0260 Rev.E
xv

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1.1
Introduction
Section One
System Characteristics
The MRC-2 Remote Control System is a modular microprocessor-based system, which can
monitor
and
control many types of equipment, including radio and
TV
transmitters.
Te
lemetry
{analog) and status (on/off) information can
be
displayed and recorded
at
both the control
location and the remote location. The MRC-2 configuration can easily
be
modified
to
the user's
needs.
The MRC-2 consolidates, into one convenient package, all of the features
of
existing
moderately-priced remote Control systems
that
require numerous auxiliary devices
to
function
as a system, in addition to many features normally found in large-scale remote
co
ntrol systems.
The
many
fea
tures incorporated into the MRC-2 are
made
possible through the use
of
a
microprocessor as the main control and logic element of each Remote Terminal
and
Control
Terminal.
The flexibility
of
the microprocessor has also led to some changes in the terminology that is
used to describe the functions performed
by
the MRC-2 and the way
it
is connected as a
system. We highly recommend that personnel installing
an
MRC-2
for
the first time completely
read and understand the manual before attempting to connect the MRC-2 to the user's
equipment. This can best be accomplished
by
connecting
the
MRC-2 equipment "back-to-back"
on a test bench (see Section
2,
Preinstallation Checkout) and exercising the functions described
in the manual until familiarity with the system is achieved.
1.2 System
Overview
An MRC-2 system can consist of one or more Control Terminals, each communicating with one
or
more Remote Terminals over one or more communication circuits.
A communication circuit can be a two-wire or tour-wire, leased-line telephone circuit. a PSTN
(dial-up) circuit, an
RS-232
circuit, a microwave
or
STL subcarrier, an on-air subcarrier,
or
combinations thereof. There can only be one Control Terminal on
a
communication circuit;
there may be a number
of
Remote Terminals on the Circuit.
A
Control Terminal may access
up
to eightcommunication circuits, and a Remote Terminal
may
access to eightcircuits.
To
satisfy the FCC single-point control rules for broadcasters, one and only
one
Control
Terminal mayissue commands to a Remote Terminal
at
any
one time. A
feature
is
incorporated
to
allow
the
control point to
be
passed from Control Terminal to Control Terminal upon operation
requests under normal conditions. In the event of communication circuit failure to
the
Control
Terminal in "control", the Remote Terminal attempts to alert the alternate Control Terminals.
If
a
positive op
er
ator response is not received within a specified time period, the Remote Terminal
takes action to initiate a control failsafe
or
telemetry failsafe, depending upon the nature of the
communication circuitfailure, and if configured to do so, can attempt to dial a Control Terminal.
MRC-2
Vol.
1
7A0260 Rev.E
1-1

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Figure 1-1 illustrates a simple configuration with one Control Terminal ·and
two
Remote
Terminals.
Two
independent communication circuits are
shown
.
One
circuitwould
be
sufficient;
however,
two
circuits that are independent
and
not
subject
to
the
same
failure conditions
will
provide the user
with
more reliable
and
faster operation. For example.
if
Circu
it
A
fails,
communications will automatically continue
on
Circuit
B.
A
9
Figure
1-1
.~EMOTE
TERMINAL
REMOTE
TER
MINAL
A
Typical
Single
Control
Terminal
System
Interconnect
Figure
1-2
illustrates a typical multiple Control Terminal configuration with a circuit
interconnection that allows an alternate Control Terminal to assume
command
capability in
the
event a failure occurs
on
the primary communications
circuit
MRC-2 Vol. 1
7A0260 Rev.E
AM/FM
STUOIC
AM
TX
SiTE
FM
TX
SITE
✓
.:-:-::-:,:;•,:-
·
:.•
·-
:
-:::-:-:
?:
TV
STUDIO
Figure
1-2
A
Typical
Multip
le
Contro
l
Terminal
·
System
Interconnect
1-2
REMOTE
I}
TERMINAL
1
{
.
!i'