Preliminary Release Model 2188 MAS Ethernet/RS-232 UHF Radio Transceiver Technical Manual Alligator Communications Model 2188 Technical Manual REV3.
Preliminary Release REVISION HISTORY REV 2.0 DESCRIPTION Initial Release Alligator Communications Model 2188 Technical Manual REV3.
Preliminary Release Paragraph 1. Contents Page Introduction.........................................................................................................................................6 1.1 General Description.........................................................................................................................6 1.2 Applications.....................................................................................................................................6 1.
Preliminary Release 5.13 Telnet Session Activity Timer.........................................................................................................22 5.14 Log-in Session Activity Timer.........................................................................................................22 5.15 Enable Transmitter........................................................................................................................22 5.16 Enable Encryption.......................................
Preliminary Release Introduction Thank you for purchasing the Alligator Model 2188 UHF Radio Transceiver. We are here to assist you personally should any questions arise in the installation or operation of this product. Please feel free to call us. We look forward to your feedback and will strive to make our product as compliant with your specific needs as possible. 1.
Preliminary Release 1.3 Technical Specifications GENERAL Frequency 150-174 MHz Input Voltage 12-24 Vdc Current Consumption (at 13.8 Vdc) <80 mA Receive Mode 100 mA Transmit Mode (3 Watts) < 1.2 A Data Rate 9600 bps Connectors Antenna Type N female Power 2-pin Captive, Rectangular Data (RS-232) DB9F FCC Certified FCC ID JIL2188 Environment Temperature -30°C to +60°C Humidity 95% at 40°C Dimensions 6.75” x 1.5” x 5.
Preliminary Release TRANSMITTER RF Power 3 W (max.) Impedance 50 Ohms Frequency Range 150 MHz-174* MHz Frequency Step Size 1 Hz Frequency Stability ±1 ppm Modulation 4GFSK Symbol Rate 4800 Hz** Data Rate 9600 bps Maximum Frequency Deviation 2400 Hz** Attack Time <1 msec Release Time <0.5 msec Bandwidth 6.25 or 12.
Preliminary Release 1.4 Warranty Alligator Communications, Inc., warrants each of the instruments of its manufacture to meet the specifications when delivered to the BUYER; and to be free from defects in material and workmanship. Alligator Communications will repair or replace, at its expense, for a period of one year from the date of delivery of equipment, any parts that are defective from faulty material or poor workmanship.
Preliminary Release 1.6 Information to user, as required by FCC section 15.21 Changes or modifications not expressly approved in writing by Alligator Communications, Inc. may void the user’s authority to operate this equipment. In accordance with FCC Rules Section 15.21, the user of this equipment is advised that changes or modifications not expressly approved 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.
Preliminary Release 2.0 Radio Configuration and Operational Check 2.1 General Discussion Prior to customer installation and electrical connection of the customer’s terminal equipment to the 2188 radio, it is recommended that the installing technician conduct a brief operational checkout of the 2188 radio and confirm that all operating parameters are set as desired.
Preliminary Release 2.2.2 Power Connector The DC power input connector to the 2188 radio is a rectangular two-pin locking connector. The radio unit is normally powered upon connection to a DC power source of +12 to +24 Vdc, +13.8 Vdc (nominal). The red conductor is positive; the black conductor is negative and is internally grounded to the chassis. 2.2.
Preliminary Release 6. Download a Telnet client program for use on your lap-top such as puTTY. Configure puTTY to communicate to the 2188 on its IP address. The normal default IP address and port for the 2188 is 192.168.1.128 port 23. Below shows a typical puTTY configuration for communicating with the 2188 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.
Preliminary Release 7. Open a Telnet session with the 2188. You should get a menu showing the current 2188 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 or . Alligator Communications Model 2188 Technical Manual REV3.
Preliminary Release 8. Set the desired transmitter frequency. For example, tf=152.0950.0. 9. Set the desired receiver frequency. For example, rf=150.0950.0. 10. Set the desired transmit power. For example, tp=1. 11. Use the dt=1 command to activate the transmitter carrier in CW mode to confirm frequency and RF level on a spectrum analyzer. You will have 120 seconds before the anti-streaming timer expires and deactivates the CW carrier.
Preliminary Release 3.0 Field Configuration and Verification Prior to field installation of the 2188, it is crucial that that bench configuration and testing be done using cables and RF attenuators to duplicate the deployed system or subsystem. This adds confidence that the configuration has been done properly and stream-lines field installation. Each remote configured 2188 must be tested with a master configured 2188 to verify proper operation.
Preliminary Release mode forwards all packets (known as promiscuous packet forwarding mode). This mode is only recommended for small systems and testing. The recommended mode is fm=1 (host mode forwarding). In this mode a master radio will only forward packets with a tabulated host source MAC address. A remote radio in host forwarding mode only forwards packets with a tabulated host destination MAC address. Up to 16 addresses can be stored in the 2188 remote or master radio.
Preliminary Release 14. The 2188 can operate using the AES256 encryption standard with the following commands: ee=0 no encryption ee=1 AES256 encryption No encryption results in the least number of extra characters appended to a message. This minimizes transmission latency. Encryption will pad extra randomized characters to create standardized message segment lengths of 128 bits. The pad characters are removed at the receiver. The AES256 standard uses a 256-bit key.
Preliminary Release 5.0 User Configuration and Diagnostic Menu The 2188 uses a simple command line interface for configuring and monitoring key parameters and metrics. Access is via IP Telnet. The 2188 is set to a default IP address of 192.168.1.128 at time of shipment. The access is either local, using the Ethernet RJ-45 connector or remote through the radio system. The command line interface facilitates writing scripts for automated configuration.
Preliminary Release 5.4 Transmit Power The 2188 transmitter output power has three power settings: 1 Low (1 W) 2 Medium (2 W) 3 High (3W) tp=x Examples: tp=1 tp=2 tp=3 5.5 Operational Mode The 2188 has two operational modes: 0 Remote 1 Master Systems can be configured for single or dual frequency. No advantage in latency is gained by using two channel frequencies. Systems use 1 master (om=1) and up to 512 remotes (om=0). It requires that the master have line of sight to all remote radios.
Preliminary Release tnp=##### Examples: tnp=23 tnp=1000 tnp=65535 5.9 Gateway Address The 2188 must be given the gateway router IP address within its LAN subnet group. Normally it is the first IP subnet address ending in 1. gw=###.###.###.### Examples: gw=10.0.0.1 gw=172.16.10.1 gw=192.168.1.1 5.10 Subnet Mask The 2188 must be given a subnet mask. The default is 255.255.0.0 sm=###.###.###.### Examples: sm=255.255.0.0 sm=255.255.255.0 5.
Preliminary Release 5.14 Log-in Session Activity Timer The 2188 times activity when using password access (pw=1). If there is inactivity for more than the specified time duration in seconds, the log-in session is automatically terminated. The default log-in session activity timer default is 120 seconds. lgt=#### Examples: lgt=300 lgt=9999 5.15 Enable Transmitter The 2188 transmitter can be enabled for normal operation or forced to be disabled by this command.
Preliminary Release 5.20 ES Encryption Phrase When encryption is enabled (ee=1), a case sensitive phrase of up to 32 characters including letters, numbers, and punctuation marks is hashed to a 256-bit AES256 encryption key using the SHA256 secure hashing algorithm. This key is used encrypt and decrypt 128- bit message fragments used in the AES256 encryption standard. aesp=###. . .### Examples: aesp= aesp=mydoghasfleas 5.
Preliminary Release 5.24 Remote RTU0 MAC Address This is the RTU MAC hexadecimal address of the first RTU connected to a remote 2188. It is stored at the remote 2188 and is used when the remote radio is in forwarding mode 0 or 2. rtu0=##-##-##-##-##-## Example: rtu0=01-23-45-ab-cd-ef 5.25 Remote RTU1 MAC Address This is the RTU1 MAC hexadecimal address of the second RTU connected to a remote 2188. It is stored at the remote 2188 and is used when the remote radio is in forwarding mode 0 or 2.
Preliminary Release Up to 16 IP addresses may be saved in the QIP table. Host number (0 to f) is in hex and associated IP addresses are in standard dot notation. The table is initially cleared to all zeros. Normally the table is filled, starting at 0 and progressing to a maximum number of f. Note that RS-232 always has high priority since it is most commonly used for polled systems. host[#]=###.###.###.### Example: host[0]=192.168.1.2 host[1]=192.168.1.3 host[f]=10.0.0.10 5.
Preliminary Release 5.31 Display Status Screen The status screen is displayed by two methods: a single press of the escape key a double press of the carriage return (ENTER key) 5.32 Display RTU Table The entire 512-entry RTU table is displayed: rtutable 5.33 Display Host Table The entire 16-entry host table is displayed: hosttable 5.34 Display QIP Table The entire 16-entry QIP table is displayed: qiptable Alligator Communications Model 2188 Technical Manual REV3.
Preliminary Release 6.0 Theory of Operation The 2188 concurrently operates transparently using two communication interfaces: Ethernet and RS-232 (Fig. 1). The 2188 encapsulates any protocol in a proprietary Alligator format to encrypt and forward multiple packet fragments across a UHF radio link and reassemble them seamlessly. It is most easily understood as a wire transmission with added latency due to time taken for transmission over a 12.
Preliminary Release the user with a list of RTU MAC addresses. Only packets destined for authorized RTUs on the MAC table are forwarded. The remote radio can also be configured for RTU filtering. This causes the remote radio to forward only packets back over the RF link when they are sourced by an authorized source RTU MAC address. This also greatly reduces the probability of system flooding. The combined RTU and Host screening mode provides the greatest amount of filtering.
FCC Statement 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
