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Preliminary Release

Paragraph Contents Page

Introduction.........................................................................................................................................6

1.1 General Description.........................................................................................................................6
1.2 Applications.....................................................................................................................................6
1.3 Technical Specifications...................................................................................................................7
1.4 Warranty..........................................................................................................................................9
1.5 Claims for damage in shipment.......................................................................................................9
1.6 Information to user, as required by FCC section 15.21..................................................................10
1.7 RF exposure information................................................................................................................10

2.0 Radio Configuration and Operational Check........................................................................................11

2.1 General Discussion.........................................................................................................................11
2.2 Operational Bench Test..................................................................................................................11

2.2.1 Antenna Connector...................................................................................................................11
2.2.2 Power Connector....................................................................................................................12
2.2.3 Initial Checkout.......................................................................................................................12

3.0 Field Configuration and Verification....................................................................................................16

3.1 Field Configuration Bench Test........................................................................................................16

4.0 Front Panel Indicators..........................................................................................................................18
5.0 User Configuration and Diagnostic Menu............................................................................................19

5.1 Transmitter Frequency...................................................................................................................19
5.2 Receiver Frequency........................................................................................................................19
5.3 Frequency Calibration....................................................................................................................19
5.4 Transmit Power..............................................................................................................................20
5.5 Operational Mode..........................................................................................................................20
5.6 Group Code....................................................................................................................................20
5.7 IP Address......................................................................................................................................20
5.8 Telnet Port.....................................................................................................................................21
5.9 Gateway Address...........................................................................................................................21
5.10 Subnet Mask..................................................................................................................................21
5.11 RS-232 Data Rate...........................................................................................................................21
5.12 Anti-streaming Timer.....................................................................................................................21
5.13 Telnet Session Activity Timer.........................................................................................................22

Alligator Communications Model 2288 Technical Manual REV3.0 Copyright © 2018

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Содержание 2288

Страница 1: ...Preliminary Release Model 2288 MAS Ethernet RS 232 UHF Radio Transceiver Technical Manual Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 1 ...

Страница 2: ...Preliminary Release REVISION HISTORY REV DESCRIPTION DATE 1 Initial Release 06 11 2018 Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 2 ...

Страница 3: ... 2 2 2 Power Connector 12 2 2 3 Initial Checkout 12 3 0 Field Configuration and Verification 16 3 1 Field Configuration Bench Test 16 4 0 Front Panel Indicators 18 5 0 User Configuration and Diagnostic Menu 19 5 1 Transmitter Frequency 19 5 2 Receiver Frequency 19 5 3 Frequency Calibration 19 5 4 Transmit Power 20 5 5 Operational Mode 20 5 6 Group Code 20 5 7 IP Address 20 5 8 Telnet Port 21 5 9 G...

Страница 4: ...ost MAC Address Table 24 5 28 High QOS Quality Of Service IP Address Table 25 5 29 Loopback Remote MAC Address 25 5 30 Diagnostic Tests 25 5 31 Display Status Screen 26 5 32 Display RTU Table 26 5 33 Display Host Table 26 5 34 Display QIP Table 26 6 0 Theory of Operation 27 6 1 RS 232 Communications 27 6 2 Ethernet Communications 27 6 2 1 Packet Forwarding 27 6 2 2 Telnet Radio Configuration and D...

Страница 5: ...and programmable to individual transmitter and receiver frequencies in the 217 220 MHz frequency band The transceiver is a fxed channel half duplex radio available with a channel bandwidth of 12 5 kHz It interfaces with both Ethernet and RS 232 1 2 Applications The 2288 data radio is designed for point to multipoint or point to point licensed operations in the 220 MHz band Some of the most common ...

Страница 6: ...80 mA Receive Mode 100 mA Transmit Mode 2 Wats 1 2 A Data Rate 9600 bps Connectors Antenna Type N female Power 2 pin Captive Rectangular Data RS 232 DB9F Environment Temperature 30 C to 60 C Humidity 95 at 40 C Dimensions 6 75 x 1 5 x 5 75 Weight 2 pounds Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 6 ...

Страница 7: ... or 50 kHz RECEIVER Input Sensitivity 117 dBm at 10 6 BER Impedance 50 Ohms Frequency Range 217 to 220 MHz Frequency Step Size 1 Hz Frequency Stability 1 ppm Selectivity 100 dB Desensitization 60 dB Intermodulation 75 dB EIA Spurious Image Rejection 80 dB Bandwidth 12 5 25 or 50 kHz Other frequency bands available on special order Other bandwidths available on special order by changing symbol rate...

Страница 8: ...e authorized by the SELLER prior to such returns Upon examination by the factory if any instrument is found to be defective the unit will be repaired and returned to the BUYER with transportation charges prepaid by the SELLER This warranty does not apply to equipment which in the opinion of the SELLER has been altered or misused NO OTHER WARRANTY IS EXPRESSED OR IMPLIED ALLIGATOR COMMUNICATIONS IS...

Страница 9: ...ved by the party responsible for compliance could void the user s authority to operate the equipment 1 7 RF exposure information FCC Rule Section 1 11307 and Industry Canada RSS 102 regulations contain limits on human RF exposure from transmitters To meet these requirements during operation the antenna of this device must be kept at a minimum distance of 112 cm from all persons Alligator Communica...

Страница 10: ...ng tests be performed in sequence Please refer to 2 2 3 Initial Checkout 2 2 1 Antenna Connector The 2288 radio antenna port RF Connector is a coaxial female Type N connector This connector mates with a male cable connector Type N such as Amphenol 3900 Andrew L44N or MIL Type UG 21 Under most circumstances bench tests are conducted with a service monitor manufactured by IFR Inc Marconi Instruments...

Страница 11: ...he antenna Type N connector The dummy load must have a power ratng of at least 2 Wats Always insure that a load or antenna is connected to the Type N connector before DC power is applied 2 Connect a spectrum analyzer to the dummy load through a power attenuator 30 dB recommended 3 Connect a computer to the 2288 using a CAT5 Ethernet cable between Ethernet connectors Alternatively you may use two C...

Страница 12: ...ical puTTY configuration for communicating with the 2288 on IP default address 192 168 1 128 port 23 Be sure to have your computer IP address set in the subnet range puTTY should have Terminal set for local echo on For example below the computer has an IP address of 192 168 1 2 and communicates via Telnet to the 2288 on the default IP address 192 168 1 128 port 23 Alligator Communications Model 22...

Страница 13: ...ld get a menu showing the current 2288 status and configuration Fig 2 You may end a Telnet session at any time by entering q The menu can be re displayed by either entering CR or ESCAPE Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 13 ...

Страница 14: ...and coaxial cable Configure one radio to be a master om 1 CR to send test packets dt 3 and the other to be a remote om 0 to receive test packets dt 4 CR The receiver will monitor the number of good and bad test packets received in this one way test c Connect two 2288 radios together using suitable attenuators and coaxial cable Configure one radio to be a master om 1 CR to send a round trip test pa...

Страница 15: ...u change the Telnet port you lose the session and must reconnect on the newly assigned port number with puTTY 6 Assign a group code if desired to identify a unique group of radios This blocks accidental communications with other 2288 radios For example gc 3 CR 7 Decide if the 2288 is a master or remote There is only one master 2288 radio in a point to point or point to multipoint radio network For...

Страница 16: ...ng the following command rtu abc CR where abc is a lower case hexadecimal number from 000 to 1ff 0 to 511 decimal Enter rtutable CR to display the RTU table on a 2288 radio configured as a master om 1 12 When using remote RTU forwarding fm 0 or fm 2 the remote 2288 radio om 0 contains a list of up to 2 RTU MAC addresses These addresses correspond to the RTUs connected to that particular remote 228...

Страница 17: ...se is converted into a 256 bit key using the SHA256 secure hashing algorithm This key is used by the AES256 encryption and decryption algorithms 15 Should it be necessary the transmitter can be disabled with the command et 0 CR To re enable the transmitter et 1 CR 4 0 Front Panel Indicators The six front panel LEDS are defined in Table 1 LED Description PWR On when 12 Vdc power is applied RXD1 On ...

Страница 18: ...ency is set in MHz with up to 9 significant figures The allowed frequency range is from 217 to 220 MHz The full format is tf CR The decimal point is optional Trailing zeros are optional Examples 217 CR 217 0 CR 217 1 CR 217 12 CR 217123456 CR 5 2 Receiver Frequency The receiver frequency is set in MHz with up to 9 significant figures The allowed frequency range is from 217 to 220 MHz The full form...

Страница 19: ... 0 to 15 The default group code is 0 gc CR Examples gc 0 CR gc 1 CR gc 15 CR 5 7 IP Address Each 2288 radio must be assigned a unique IP address within its LAN subnet group This permits both local and remote access of radio configuration and status information The default IP address is 192 168 1 128 It must be changed prior to field deployment The IP address assigned to the radio is for diagnostic...

Страница 20: ...200 bps 2400 bps 4800 bps 9600 bps default and 19200 bps dr CR Examples dr 1200 CR dr 2400 CR dr 4800 CR dr 9600 CR dr 19200 CR 5 12 Anti streaming Timer The transmitter key on time is timed to prevent disrupting the channel The maximum on time is the anti streaming time defined in seconds The default is 120 seconds This is most often invoked when performing testing with a CW carrier that is activ...

Страница 21: ...le AES256 encryption Examples ee 0 CR ee 1 CR 5 17 Enable Password Entry The 2288 can restrict access by forcing an id and password before access is granted ep CR 0 disable password entry 1 enable password entry Examples ep 0 CR ep 1 CR 5 18 ID Identification Number When password entry is enabled ep 1 this ID must match to gain access to the 2288 The ID is case sensitive and can be any set of up t...

Страница 22: ...void RF network flooding There are four forwarding modes 1 RTU and Host qualified RTU and Host source destination MAC address 2 Host qualified host source destination MAC address 3 RTU qualified RTU source destination MAC address 4 All No filtering all packets forwarded fm CR The factory default is fm 3 but it is highly recommended that it be changed to fm 1 host forwarding to prevent flooding Hos...

Страница 23: ...arding operation by the master radio when fm 0 or fm 2 rtu CR Example rtu 000 01 23 45 ab cd ef CR rtu 1ff 01 23 de ad be ef CR 5 27 Host MAC Address Table This is the command format for entering host hexadecimal addresses in the 2288 host table It is used when either the master or remote radio is in forwarding mode 0 or 1 Up to 16 host MAC addresses may be saved in the host address table Both hos...

Страница 24: ...e remote radio hexadecimal MAC address placed in the master radio when performing the loopback diagnostic test dt 5 Note that Alligator 2288 radios are currently assigned to MAC addresses starting with 70 b3 d5 9c e lb CR Example lb 70 b3 d5 9c e0 00 5 30 Diagnostic Tests There are several different diagnostic tests that can be performed using the dt command 1 TX CW 2 RX CW 3 TX 1 Way 4 RX 1 Way 5...

Страница 25: ...of the carriage return ENTER key 5 32 Display RTU Table The entire 512 entry RTU table is displayed rtutable CR 5 33 Display Host Table The entire 16 entry host table is displayed hosttable CR 5 34 Display QIP Table The entire 16 entry QIP table is displayed qiptable CR Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 25 ...

Страница 26: ...eening is done to minimize data traffic not intended for the radio network that could otherwise flood the system The 2288 has four programmable forwarding modes 1 No Screening 2 Host Screening 3 RTU Screening 4 RTU and Host Screening The simplest forwarding mode does not screen any packets This is referred to as the IP promiscuous mode and is only used in small systems where flooding by unwanted p...

Страница 27: ...rate client host for radio configuration and diagnostics Users of RS 232 interfaces also use the Ethernet interface with a Telnet client program The Telnet communications over the RF link shares the bandwidth of the system transparently 6 2 3 Graphics Heavy Communications The use of communications carrying a large amount of graphics data is discouraged Please be aware that at 9600 bps the transmis...

Страница 28: ...m 1 Diagnostic Computer Ethernet LAN 2888E Remote Radio om 0 RTU 2 RTU 1 Ethernet LAN Internet 2888E Remote Radio om 0 RTU 4 RTU 3 Ethernet LAN Figure 1 Typical System Block Diagram Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 28 ...

Страница 29: ...Preliminary Release Figure 2 2288 User Line Commands Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 29 ...

Страница 30: ...Preliminary Release Model 2288 Internal Reset Push Button Location Alligator Communications Model 2288 Technical Manual REV3 0 Copyright 2018 Page 30 ...

Страница 31: ...l interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television ...

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