MDS MDS 4710 Series Dokumentacja Strona 11
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Oceniono. / 5. Na podstawie oceny klientów
MDS 05-3438A01, Rev. E MDS 4790/9790 Series I/O Guide 3
a transceiver board will cause the boards to communicate briefly with
each other to establish which board will operate as the active board and
which operates as the stand-by. For more information, see “Transceiver
Board and Power Supply Assemblies” on Page 82.
2.3 Applications
The MDS 4790/9790 Series is designed for point-to-multipoint data
transmission in oil and gas pipeline communications, transactional sys-
tems and telecommunications systems. An MAS network provides com-
munications between a central host computer and remote terminal units
(RTUs) or other data collection devices. The operation of the radio
system is transparent to the computer equipment.
Basic MAS Master Station Operation
Figure 2 shows a typical point-to-multipoint system using an
MDS 4790/9790 Series master station. This is a basic system consisting
of a central master station and several associated remote units.
Figure 2. Typical MAS Network
Repeater and Polling Remote Operation
An MAS system using repeater and polling-remote radios is shown in
Figure 3. Notice that the polling remote radio is operating in half-duplex
mode and the repeater is operating in full-duplex mode. Configuring the
radio for repeater operation can be as simple as typing
REPEATER ON
with a PC connected to the rear panel diagnostic port. (See “DIAGNOS-
TICS AND CONTROL” on Page 28 for details.)
–
IDIAG
13.
8
VDC
P
WR
+ –
HOST SYSTEM
REMOTE RADIO
SWC OFF
RTU
RTU
RTU
RTU
–
IDIAG
13
.
8
V
DC
PWR
+
–
–
IDIAG
1
3.8
V
D
C
PWR
+
–
–
IDIAG
13.
8 V
D
C
PWR
+ –
–
IDIAG
13
.8 V
D
C
PWR
+
–
RTU
MDS MASTER
STA TION
CONTINUOUSLY
KEYED
REMOTE RADIO
SWC OFF
REMOTE RADIO
SWC OFF
REMOTE RADIO
SWC OFF
REMOTE RADIO
SWC OFF
- MDS 4790/9790 Series 1
- QUICK START GUIDE 2
- TABLE OF CONTENTS 3
- Copyright Notice 6
- Operational Safety Notices 6
- ESD Notice 8
- Environmental Information 8
- 1.0 INTRODUCTION 9
- 2.0 PRODUCT DESCRIPTION 9
- 2.1 Network-Wide Diagnostics 10
- 2.3 Applications 11
- 2.4 Features 12
- 2.5 Accessories 13
- 3.0 INSTALLATION PLANNING 14
- (Shown mounted to mast) 17
- 4.0 INSTALLATION PROCEDURES 18
- 4.2 Mounting the Radio 19
- Figure 7. Mounting Dimensions 20
- 4.3 Primary Power 21
- ON/OFF SWITCH 22
- DC POWER INPUT 22
- 4.4 Backup Battery 23
- Battery Reset Switch 24
- (See Text) 24
- Duplexer 24
- ANT connector 26
- (Most common arrangement) 26
- TX and RX ports are the only 26
- DATA PORT to prevent damage 28
- Data Interface Connector—J3 30
- Invisible place holder 30
- 5.0 START-UP AND OPERATION 32
- 5.2 Front Panel Indicators 33
- Figure 24. LED Indicators 34
- 6.0 DIAGNOSTICS AND CONTROL 36
- MDS P/N 97-1971A04 37
- 6.2 PC Command Summaries 38
- For example: REPEATER 39
- For example: REPEATER ON 39
- PC COMMAND 42
- FRONT PANEL 42
- MENU DESCRIPTION 42
- STAT (described on Page 52) 43
- Major Alarm Event 45
- Assignments 45
- Alarm Sense ASENSE [HI/LO] 46
- Battery Backup 46
- Monitoring & Alarm 46
- Data Interface Baud 46
- Data Interface 47
- Buffering 47
- Event Log Date 49
- Dekey Transmitter DKEY 49
- Emphasis screen, Page 66 50
- Hardware Revision 51
- Initialize to Factory 51
- Defaults 51
- Manual Key screen, Page 68 52
- Clear Logs screen, Page 75 52
- 4-WIRE AUDIO INTERFACE 53
- Modem screen, Page 65 53
- Alarm Masks screen, Page 71 53
- Options Installed OPT 54
- Owner’s Message OWM [xxxxx] 54
- Owner’s Name OWN [xxxxx] 54
- Received Signal 56
- Strength Indicator 56
- Remote Terminal 56
- Receive Frequency RX [xxx] 57
- Received Data Audio 57
- Receive Pad screen, Page 71 58
- Transmit Timeout screen 58
- Serial Number screen, Page 74 58
- Show Selected 59
- Parameters 59
- Signal-to-Noise 59
- Unit’s Internal 61
- Temperature 61
- Transmit Timeout 62
- Transmit Data Audio 62
- Front Panel 64
- This graphic points you 68
- Table 17. dBm Vs. Watts 73
- Clear-to-Send 74
- Standby 77
- Equipment 77
- Transmit Level 78
- [–20 to +3, AUTO] 78
- Set Owner 80
- 7.0 LOCAL & NETWORK-WIDE 83
- PROBLEM SOLVING 83
- 7.1 Local Problem-Solving 84
- DTYPE ROOT command (Page 42) 88
- DIAGNOSTICS port, an 89
- 8.0 REPLACING ASSEMBLIES 90
- POWER SUPPLY 91
- MAIN TRANSCEIVER 91
- (P/N 28-1575Axx) 92
- Backup Battery 92
- POSSIBLE 94
- EQUIPMENT 94
- 9.0 RADIO SOFTWARE UPGRADES 99
- COOLING FAN 99
- (Keep clear of dust) 99
- AIR FLOW 99
- 9.2 Preparing for Download 100
- 10.0 TECHNICAL REFERENCE 101
- ±1.5 ppm 102
- 10.2 RF Propagation Planning 103
- FProb a b 6.0 10 107
- GLOSSARY 109
- IN CASE OF DIFFICULTY 119
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