Microwave Data Systems MDS entraNET 2400 Especificaciones Pagina 173
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05-4055A01, Rev. D GE MDS entraNET Reference Manual 163
6. View the Radio Retries and No Ack counts at the point of maximum
RSSI level. They should be the same or lower than the previous
reading.
(Main Menu > Performance Information > Packet Statistics > Wireless Packet
Statistics)
If the RSSI peak results in an increase in the Radio Retries and No Ack
counts, the antenna may be aimed at an undesired signal source. Try
a different antenna orientation.
6.5.3 Tips for Improving Data Throughput
Some suggestions are offered below for maximizing the throughput of
the radio system. It is important to realize that an exact formula for every
radio system cannot be given. Much depends on the number of radios
contained in the radio system, the size of data strings being sent, the type
of data being sent, zone quality (interference potential) and data speed.
You should find several items here, however, that can be applied to your
radio system.
To Maximize Throughput of Data and Reduce Latency Time
• (AP only) Increment the Hop Time to the maximum of 28 msec.
This lowers the overhead, since it stays longer on a channel. The
drawback is that if a particular channel becomes blocked, it will
take longer to hop to another channel.
(Main Menu>Radio Configuration>hop Time)
• Match the buffer sizes and hop times to accommodate the
majority of message sizes. For example, a 7 msec hop time is
best suited to short data bursts, such as in telemetry applications.
A 28 msec hop time is better suited to large data strings, such as
sending Web pages over the radio link.
The following table offers suggested settings for four different message
sizes.
Table 6-7. Hop Time Setting versus Message Size
Hop Time
(msec)
FEC Status* Bytes per
Packet
28 OFF 325
ON 151
14 OFF 139
ON 59
7OFF45
ON 11
* FEC ON is generally not recommended if optimal
throughput is desired. The transceiver Repeat-Retry
function is a more efficient means of ensuring message
delivery.
- MDS entraNET 1
- Quick Start Instructions 2
- TABLE OF CONTENTS 3
- RF Exposure 9
- INTRODUCING THE 11
- GE MDS entraNET SYSTEM 11
- 1.1 ABOUT THIS MANUAL 13
- 1.2 PRODUCT DESCRIPTION 13
- 1.3 APPLICATIONS 16
- Serial Interfaces 19
- Configuration 19
- 1.4 GE MDS SECURITY SUITE 20
- 1.5 ACCESSORIES 22
- Table 1-3. Accessories 23
- TABLETOP SETUP AND 25
- EVALUATION 25
- 2.1 INTRODUCTION 27
- 2.2 CONNECTOR OVERVIEW 27
- 2.3 TEST SETUP 28
- Main Menu > 29
- POSSIBLE 30
- EQUIPMENT 30
- COM1 port on the radio 31
- Telnet Connection 32
- Using the AP LAN 32
- Port (a valid IP 32
- PC Running Terminal Session 34
- (19,200 bps, 8N1) 34
- ETH=ON command to enable the 35
- Figure 2-7. PING Test Setup 36
- Serial Connections 37
- AP MANAGEMENT 39
- 3.1 INTRODUCTION 41
- 3.1.2 Menu Structure 42
- Invisible place holder 43
- (a Telnet session is similar) 45
- 3.2.1 Methods of Control 46
- To COM1 or LAN Port 47
- (See Text) 47
- Serial or Ethernet 47
- Crossover Cable 47
- Starting a Telnet 48
- COM 1 port and viewing the 49
- Starting a Web 50
- Browser Session 50
- 3.2.3 Navigating the Menus 52
- 3.3 BASIC DEVICE INFORMATION 53
- 3.3.2 Main Menu 54
- 3.4 CONFIGURING NETWORK 55
- PARAMETERS 55
- 3.4.2 IP Configuration Menu 56
- 3.5 CONFIGURING RADIO 62
- Figure 3-20. Skip Zones Menu 63
- 3.6 CONFIGURING THE SERIAL 64
- INTERFACES 64
- Commit Changes option to 66
- (Host Connection screen) 68
- SHIFT ENTER 69
- COM1 or COM2). [COM1 70
- COM port in 70
- (IP-to-Remote Serial) 72
- 3.7 SECURITY CONFIGURATION 74
- OFF prior to upgrading 75
- 3.8 WIRELESS NETWORK MENU 79
- 3.8.1 Remote Management Menu 80
- Broadcast 83
- [0-15; 0] 85
- 3.9 STATISTICS AND EVENT LOG 87
- COM1 and COM2 ports 88
- 3.9.5 Event Log Menu 92
- 3.10 DEVICE INFORMATION MENU 94
- 3.11 MAINTENANCE AND TOOLS 95
- 3.11.1 Reprogramming Menu 96
- PING Utility Menu 100
- 3.11.5 Transmitter Test Menu 102
- 3.12 REDUNDANCY MENU 103
- 3.13 DNP3 ROUTING MENU 107
- REMOTE RADIO 109
- MANAGEMENT 109
- 4.1 INTRODUCTION 111
- 4.2 Programming Methods 111
- 4.3 Log-in Procedure 111
- 4.4 Commands 112
- SPACE ENTER 112
- COM1 port buffer size 114
- COM1 port default mode on 114
- COM2 port data characters 117
- COM port 125
- COM1 packet statistics 126
- COM2 packet statistics 126
- 4.6 UPGRADING REMOTE FIRMWARE 127
- CONFIGURATIONS 129
- 5.1 INTRODUCTION 131
- Access Point 132
- Application Example 133
- G to display the Main Menu 134
- Figure 5-5. Main Menu 135
- A to select “Serial” 136
- A to select “One Remote” 137
- N to continue 137
- Figure 5-14. Enable Port 140
- X to commit the 141
- Figure 5-18. Main Menu 143
- Then press D to continue 144
- (broadcast) 145
- Figure 5-26. Enable Port 148
- N as many times 149
- 5.6.1 Operation and Data Flow 150
- Remote 1 151
- Remote 2 151
- Remote 3 151
- Remote 4 151
- 2. Select A to choose TCP 152
- Figure 5-33. IP Port Settings 153
- Figure 5-35. Group ID 1 154
- Figure 5-37. Confirm Changes 155
- INSTALLATION 157
- LOW-LOSS FEEDLINE 159
- COM1 port. See “Aiming 160
- DIN Rail Mounting 162
- (mounted to mast) 164
- High-gain Type 164
- Unity-gain Type 164
- (RG-214 coaxial cable) 165
- BE USED? 166
- (Antenna Gain in dBi* 167
- (in dBm) 167
- (in dBi) 169
- 6.5 OPTIMIZING PERFORMANCE 170
- LINK LED 172
- TROUBLESHOOTING 175
- AND RADIO TESTS 175
- 7.1 TROUBLESHOOTING 177
- Management System 178
- TECHNICAL REFERENCE 187
- 8.1 UPGRADING AP FIRMWARE 189
- & TELNET 190
- COM1 and COM2 192
- 8.3 DATA INTERFACE CONNECTORS 197
- 8.3.2 COM1 Port 198
- 8.4 TECHNICAL SPECIFICATIONS 199
- RADIO CHARACTERISTICS 200
- PHYSICAL INTERFACE 200
- DATA CHARACTERISTICS 200
- TRANSCEIVER MANAGEMENT 201
- ENVIRONMENTAL 201
- MECHANICAL 202
- AGENCY APPROVALS 202
- TERMS AND 205
- ABBREVIATIONS 205
- IN CASE OF DIFFICULTY 219
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