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Appendix
Operating Instructions SCALANCE W78x
C79000-G8976-C184-07
262
Power Specifications
Specifying Power in dBm
A commonly used reference variable in wireless technology is a power of 1 mW.
Power can then be specified in the decibel milliwatt unit (dBm). The following
formula is used:
P [dBm] = 10 * log (P [mW] / 1 mW)
This results in the following power specifications in dBm:
0.5 mW ≈ -3 dBm
1 mW = 0 dBm
2 mW ≈ 3 dBm
4 mW ≈ 6 dBm
10 mW ≈ 10 dBm
100 mW ≈ 20 dBm
200 mW ≈ 23 dBm
1 W ≈ 30 dBm
Using power specifications, it is simple to calculate gain and attenuation. To
calculate an entire system, the individual values for gain and attenuation must
simply be added.
Transmit Power dBm
The information in the following tables applies to the following SIMATIC NET
products:
● Access point SCALANCE W788-1PRO, W788-2PRO, W788-1RR, W788-2RR
● Client module SCALANCE W744-1PRO, W746-1PRO, W747-1RR
● IWLAN/PB Link
Transmit Power in IEEE 802.11b Mode (2.4 GHz)
Data rate [Mb/s] P
0
[dBm]
1
18
2
18
5.5
18
11
18
- Trademarks 3
- Prior to Startup 4
- Preface 5
- Biological Compatibility 8
- Contents 9
- C79000-G8976-C184-07 10
- Communication 13
- Wireless Access to a Wired E 15
- Multichannel Configuration 16
- Figu x 18
- LAN Communication 19
- 1.2.2 IP-based Communication 20
- Componen o 21
- NCE W78x 22
- P of the 23
- LED Display 25
- Replacing the C-PLUG 28
- 3.1 Ligh 31
- Grounding 32
- Power over Ethernet 32
- 3.2 Assembly and Connectors 33
- ANCE W78x 34
- 3.3.1 General Notes 35
- • 30 mm for the data leads 40
- It Works 44
- Creating a 44
- Using the vice 46
- Changing a used PRESET PLUG 46
- Primary S 47
- DLC Protocol 48
- Professional 49
- Professional SP2 50
- 4.5 Working with the Prim 52
- Removing a Module 55
- Principle of We 57
- 5.2 Starting Web Bas 59
- 5.2.1 Co 60
- 5.3 Selecting the W 61
- 5.4 Basic Wizard 63
- Subnet Mask input box 64
- 5.4.2 System name 65
- 5.4.3 Country Co 66
- Description 67
- SSID text box 67
- Wireless Mode list box 67
- 5.4.6 Adopt MAC Ad 69
- MAC mode list box 70
- Adopt MAC text box 71
- 5.4.7 Channel Settings (on 72
- Radio Channel list box 73
- 5.4.8 Finish 74
- 5.5 Security Wizard 75
- .5.1 Security Settings 76
- Protocols for 77
- SNMP Read Only Check Box 78
- Network-Specific Security 79
- Settings 79
- Inter SSID Com 81
- Predefined Security Levels 83
- Authentication 84
- Encryption key source 86
- Encryption 86
- Default Key list box 87
- Key text box 87
- Length list box 87
- RADIUS Se 88
- Dot1x user name text box 89
- Dot1x user password text box 89
- Pass phrase text box 90
- Highest 91
- 5.5.12 Finish 92
- .6 iPCF Wizard 93
- Transmit power list box 94
- Antenna Mode list box 94
- Security Settings with iPCF 96
- Security le 96
- Specifying 97
- the Key 97
- 5.6.4 Fi 98
- Interface 99
- 6.1.2 Th 100
- 6.1.4 Co m 102
- Cross-menu Commands 103
- CLI\ ... > 103
- .2 The System Menu 104
- Reading out the Country Lis 105
- The HiPath Access Point Mo 106
- Exiting the HiPath Mode 109
- CLI\SYSTE 110
- 6.2.2 IP 112
- Settings Menu Command 112
- Syntax of the Command Line 113
- Interface 113
- M\IP> 113
- 6.2.3 Services Menu Command 114
- CLI\SYSTEM\SERVICES> 115
- 6.2.4 Restart Menu Command 116
- M\RESTARTS> 117
- System Ev 118
- Reaction to System Events 119
- Syntax of the Command Line I 119
- CLI\SYSTEM\EVENT> 119
- 6.2.6 E-mail Config Menu Com 121
- Configurati 122
- Trap Submenu 122
- Groups Submenu 122
- Users Submenu 123
- CLI\SYSTEM\SNMP> 124
- CLI\SYSTEM\SNMP\GROUP> 125
- M\SNMP\USER> 126
- CLI\SYSTEM\SNMP\TRAP> 126
- 6.2.8 Sy 127
- S box: 128
- CLI\SYSTEM\SYSLOG> 129
- Time-of-Day for Sy 130
- CLI\SYSTEM\SNT 130
- Information on E 131
- CLI\SYSTEM\FAUL 131
- 6.2.11 Lo 132
- Configuration Package 134
- CLI\SYSTEM\LOADSAVE> 134
- 6.2.12 C-PLUG Menu Command 136
- C-PLUG Error Message 139
- CLI\SYSTEM\CPLUG> 140
- 6.3 Interfaces Menu 141
- Syntax of the Co 142
- CLI\INTERFACES\ETHERNET> 142
- 6.3.2 W 143
- LAN Menu Command 143
- Channel S 144
- Set values 146
- CLI\INTERFACES\WLAN1> 147
- C S\WLAN2> 147
- LI\INTERFACE 147
- 6.3.3 Advanced Submenu 149
- Antennas 151
- 6.3.4 SS mode only) 156
- ID List Submenu (client 156
- 6.3.5 Adva 157
- Handling 802.11b Clients 158
- 802.11g Expan 158
- Variable S 160
- CLI\INTERF \D 161
- ACES\WLAN1 ata Rates> 161
- 6.3.7 VA mand 162
- P Submenu Com 162
- 6.4 The nu 163
- Security Me 163
- CLI\SEC C\WLAN1> 169
- URITY\BASI 169
- CLI\SECURITY\BASIC\WLAN2> 169
- 6.4.2 Keys Menu Command 173
- .4.3 ACL Menu Command 174
- New Entry in the ACL 175
- RADIUS Server Menu Command 178
- Menu Command 179
- 6.4.5 Access 179
- 6.5 The Bridge Menu 180
- 6.5.1 WDS Menu Command 181
- CLI\BRIDGE\WDS\WLAN1> 182
- CLI\BRIDGE\WDS\WLAN2> 182
- 6.5.2 VLAN Menu Command 183
- VLAN ID Settings 185
- VLAN Setti 188
- User priori 189
- Port VLAN ID (o 190
- W788xRR) 190
- CLI\BRIDG 191
- EVLAN\VLAN_ID> 191
- C ORTS> 191
- LI\BRIDGE\VLAN\P 191
- A edundant 192
- Rapid Spanning Tree 193
- CLI\BRIDGE\SPANNING> 195
- Spanning T e 196
- Configurat id) Spanning Tree 199
- C PANNING\PORT 200
- LI\BRIDGE\S S> 200
- CLI\BRIDG THR> 202
- 6.5.7 NAT Menu Command 203
- Devices 205
- Configurat 205
- • SCALANCE W747-1R 208
- WLAN Access by Several Devi 208
- MAC Mode 208
- 6.6 The Filters Menu 210
- S and Line I 211
- Addresses 211
- CLI\FILTERS\MAC2FLT> 211
- 6.7 The I-Features Menu 213
- CLI\IFEATURES\IQOS\WLAN1> 214
- 6.7.2 iPCF Menu Command 215
- How iPCF Works 216
- When should iPCF be used? 216
- Configuration 217
- PNIO upda 217
- CLI\IFEATURES\IPCF\WLAN1> 218
- CLI\IFEATU 218
- RES\IPCF\WLAN2> 218
- Functional Description 219
- CLI\IFEATURES\LINKCHECK> 221
- 6.7.5 Redundancy Menu Comma 222
- CLI\IFEATURES\REDUNDANCY> 223
- 6.7.6 IP-Alive 224
- RES\IP_ALIVE> 225
- Information Menu 226
- Logging System Events 227
- CLI\INFORM\LOG> 227
- 6.8.2 Auth Log Menu Comma 228
- 6.8.3 Ve 229
- Logged on 230
- Clients 230
- CLI\INFORM\WLAN1> 231
- CLI\INFORM\WLAN2> 231
- 6.8.5 Ethernet Menu Command 232
- WLAN Menu Command 232
- Receive Errors: 234
- Transmit Errors 235
- Overlap AP 236
- \INFORM\WLAN2> 237
- 6.8.7 iQoS Menu Command 238
- 6.8.8 Spanning T 240
- Syntax of t 241
- 6.8.9 IP 242
- CLI\INF SIGNAL 247
- ORM\ > 247
- SCALANCE W78x 67 years 249
- Mechanical Properties 250
- Electrical P 250
- Dimension 251
- Drawing 251
- Approvals 252
- FCC App va 256
- Appendix 257
- Variables 258
- Example of RCoax 261
- Power Specifications 262
- Specifying Power in dBi 263
- Losses due to Coupling Loss 264
- UDistanceU UCoupling lossU 265
- Procedure 267
- Glossary 269
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