• Rf link repeater

    Rf link repeater

    In order to increase network coverage and reach the last mile. RF repeaters provide cost-effective improvement in-building and outdoor coverage in places such as tunnels, buildings, basements, car parks, airports, rural areas, highways, railway stations, dense areas.

    This solution not only provides good coverage and capacity inside the building but also reduces the load on the outdoor cell site. Home RF Repeaters. Multiple types with composite output power from 20dBm to 40dBm.

    Automatic Level Control for tuning-free setup. Local or Remote management for Configurable and alarms. Designed specifically to answer the needs of MHz cellular systems. Inquire Online. Fully comply with LTE standard.

    Multiple types with composite output power from 20dBm to37dBm. Multiple types with composite output power from 16dBm up to 37dBm. Designed specifically to answer the needs of Japan and MHz cellular systems. Multiple types with composite output power from 20dBm to 43dBm. Local or Remote management for configuration and alarms.

    Designed specifically to answer the needs of Cellular MHz systems. Multiple types with composite output power from 16dBm to 37dBm. Selectable bandwidth by the GUI to support any partial or full band applications. Multiple types with composite Output power from 16dBm to 40dBm. Efficient thermal characteristics, careful component selection and robust design result in high system reliability.

    Selectable bandwidth by the GUI to support any band configuration. Designed specifically to answer the needs of the MHz systems. Multiple types with composite output power from 20dBm to 37dBm Smart Automatic Level Control ALC ensures stable and adjustable continuouslyoutput level Efficient thermal characteristics, careful component selection and robust design result in high system reliability Local or Remote management for configuration and alarms Designed specifically to answer the needs of the Japan MHz systems.

    Which radio module? NRF24, LoRa, CC1101, HC12, 433MHz, HC05

    Multiple types with composite output power from 20 up to 37dBm. Selectable bandwidth by the GUI to support to support any band configuration. Selectable bandwidth by the GUI to support any block configuration. Multiple types with composite output power from 20dBm up to 37dBm.

    rf link repeater

    Multiple types with composite Output power from 21dBm to37dBm. Smart Automatic Level Control ALC ensures stable and adjustable continuously output level Efficient thermal characteristics and robust design result in high system reliability. Adjustable band with High selectivity for excellent out of band signal rejection. Multiple types with composite output power from 21dBm to 35dBm. Selectable frequency band to support multi block configuration.

    Local or Remote management through wireless modem. Smart Automatic Level Control ALC ensures stable and adjustable continuously output level Selectable frequency band to support multi- block configuration. Very high out of band rejection to avoid cross bands interferences. Supports full or partial bandwidth. Multiple types with composite Output power from 24dBm to 30dBm per band. Smart Automatic Level Control ALC ensures stable and adjustable continuously output level Adjustable band with High selectivity for excellent out of band signal rejection.Within a local or regional area, many ham radio repeater systems may use remote receivers that relay weak signals from outlying areas back to the main repeater transmitter.

    The relayed signal is transmitted over a control link, which is a dedicated transmitter and receiver operating on a VHF or UHF band. To link repeaters over wide areas and long distances, however, it is common for repeater systems to use the Internet. D-STAR uses its own set of protocols to link individual and multiple repeaters through gateways.

    All three systems are active, and more repeaters are linked to the systems every day. The IRLP system includes about 3, stations around the world. EchoLink currently lists more than 2, repeaters and more than conference servers.

    rf link repeater

    The links between repeaters and individual stations in the IRLP and EchoLink systems are controlled manually by the system users. The code identifies the repeater system you want to use; then the system sets up the connection and routes the audio for you.

    When you finish, another code or a disconnect message ends the sharing. This overview is very simplified, of course, and both systems offer useful features beyond simple voice links. D-STAR is not only a type of repeater system, but also a complete set of digital communication protocols for individual radios.

    Then the system directs each repeater to make the connection and share the voice data. When the node-to-node connection is made, the audio on the two repeaters is exchanged, just as though both users were talking on the same repeater.

    You can also connect several nodes by using an IRLP reflector.

    Crossbanding/ RF Linking

    The reflector exchanges digitized audio data from any node with several other nodes in real time. All users who create radio transmissions have to be licensed, however. Using the IRLP system is very much like using an autopatch system. The access code sets up the repeater to accept an IRLP on-code.

    This process is just like activating autopatch. When the repeater indicates that the IRLP system is ready, enter the tones that send the on-code of the repeater that you want to connect to. Entering the tone is just like entering a telephone number into an autopatch system.

    You can find a list of available IRLP nodes and their on-codes on their website. Any transmissions that you make are retransmitted on the remote node, and you also hear all the audio from the other node. If the other node is busy with another IRLP connection, you hear a message to that effect. Try another node, or come back later.Emergency Communications.

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    Class Details. Online Resources. Wilderness Protocol. Field Day. Holiday Banquet.The following Rep eaters are linked into the SkyHub on a permanent basis with exception to certain events. If you would like to add your repeater to the full-time link list, please head over to the contact section. Squaw Mountain provides wide area coverage: west to the Continental Divide, south to Colorado Springs, east to Limon, and north to Cheyenne.

    Please see the RMRL repeater page for more information. The SkyHub is accessed by this repeater through the BrandMeister network. Touse this repeater, you need a DMR radio.

    To program this in your radio, typically you will need to create a new contact withand then program a new channel to use that contact as a group call on the repeater frequency. This offers excellent mobile and HT coverage in the Denver area, and coverage back up into the canyons in the mountains where some of the mountaintop repeaters are shadowed.

    This machine is located on Lookout Mountain just west of Golden, and provides Wires-X capability as well.

    WIFI Adapter

    The Wires-X is steerable, and and room can be joined. Put your radio in Wires-X mode to see what room the repeater is on. Making contacts is great, listening for awhile to see who is on is fine, making contacts is encouraged but just using for personal background monitoring is not. N3ZF Bernie has worked more than 80 countries and many states on The world is online for your choice to make contacts with! This repeater offers coverage from Warren Mountain in the southwestern and western corridor along C, plus full metro coverage east and north of I It is provided by the Denver Radio League.

    It is Wires-X capable and steerable to different Wires-X rooms. This repeater offers coverage on the 33cm band in Denver and is located on Lookout Mountain. This repeater is built by W0SKY, and has a sector antenna giving degree coverage in the front range. Excellent HT coverage is offered in downtown Denver. This is currently one of the only Analog repeaters on MHz in the front range, and will hopefully encourage more hams to experiment with the band.

    The split is The reason for the odd split is to deal with interference problems on the mountaintop. This is permanently linked to the Montrose and Gunnison repeaters through an RF link.

    This repeater is also provided by Keri, and offers wide-area coverage in the montrose area from Waterdog peak. This repeater is also provided by Keri, and offers wide-area coverage in the Gunnison area from W mountain or Tenderfoot peak. Coverage is provided into the Gunnison valley and East and west along Highway Output is 45 watts.Internet Repeater Linking.

    This page has received hits since February 10 This page describes Internet repeater linking and explains how it works. This page will concentrate more on the concepts of repeater linking and the technical issues involved. What is Internet Repeater Linking? Internet repeater linking is simply the process of using the Internet to act as a voice connection between two or more repeaters.

    In essence, the Internet is used instead of more traditional media such as leased lines or UHF radio links. Using the Internet in this way allows links to be made economically between repeaters hundreds or thousands of km apart, even on opposite sides of the world, something which would be prohibitively expensive by any other method.

    Another side effect of some linking systems is that individual amateurs with a soundcard, headset and a microphone can work distant repeaters WITHOUT a radio! This can be of benefit to those in isolated areas, or who are unable to erect suitable antennas.

    Types of Internet Repeater Links. Internet repeater links can be made with a variety of software and hardware. However, most fall into two broad categories, based on the technology used to make the link:. VOX based linking uses commonly available Internet telephony software running on a computer. PTT on the link radio is driven by a VOX which uses the computer's audio output to decide when to key the transmitter. Similarly, the software's own "VOX" determines when received audio will be transmitted to the Internet.

    rf link repeater

    VOX based systems are cheaper and simpler to setup initially, but unless properly setup, can be prone to "tail chasing loops" and spurious triggering. With suitable attention paid to the linking hardware, reasonable performance can be obtained, as was demonstrated in the Australia Day linkup on January 26, VOX based repeater linking can be used to link two sites in a point to point configuration, or multiple sites via a conference server.

    VOX based repeater linking is most suitable for temporary and ad hoc links, as it requires little or no modification to repeaters, radios or computers, and requires minimal outlay. Hardware based systems may also have other features such as DTMF remote control of the link.

    Typically, hardware based Internet linking is more reliable around as reliable as other methods, such as RF linking than VOX linking, due to the unambiguous control signals passed between the computer and the link radio sand is very well suited to permanent unattended links between distant repeaters. Software used for hardware based linking is typically customised for the purpose, as most off the shelf software does not provide the necessary control signals to drive the link interface.

    Again, point to point links and conference rooms are possible.The 'best way' to link repeater sites is really dependent on the situation and personal preference, so instead of giving you the 'best' way, I'll give you a few examples of how it can be done and you can decide what it the best for your situation. This article assumes you will be linking amateur repeaters, but the procedures could be followed to link commercial sites as well; assuming you are within the rules of the particular commercial service.

    The "Remote Base" type link system is the most common because of its simplicity and low cost. Basically a simplex radio old hand held or mobile rig is connected to a repeater that you want linked to another. This "link" radio need not be duplex because of the way the link and repeaters are configured.

    The link remote base radio will need to be on the same Band, Frequency, Split, and PL as the repeater you are linking to. Remote Base operations can be carried out on any amateur voice band, even HF! Links below should be used on a part time basis because the FCC says that 'linking' must be done above The Hub is the main repeater in the system. You can remote base, or "link", as many "outboard" repeaters into the hub as you wish, providing you have a good RF path to the hub from the outboard repeater site s.

    All ID's from the hub are heard through the entire system, so if you like voice ID's, they need only exist on the hub. Since you can disconnect or "un-link" any repeater from the system, all outboard repeaters should have their own controller with ID. This controller needs to have 2 ports, one for the repeater and one for the remote base radio.

    The NHRC controller company and several others make a few models of controllers that have remote base link capability. How a Remote Base works Audio from the repeater receiver is transferred into the repeater transmitter, and the user is heard on the repeaters output frequency. When the user unkeys, the controller usually puts some 'hang time' on the repeater transmitter; during this time is when the courtesy tone is heard and the repeater transmitter drops after this time usually 1 to 5 seconds has expired.

    When a remote base is connected and enabled on this repeater, the user keys into the repeater on the input frequency, the controller recognizes the user and keys the repeater transmitter, at this same instant the controller also keys the remote base radio, the user speaks and their voice is heard and not only transmitted over the repeater, but also the remote base transmitter frequency.

    If the remote base is dialed on a repeater frequency, the users voice is heard on the linked repeater also. When the user unkeys, the repeater transmitter continues to transmit during the 'hang time', however, at this instant the remote base radio unkeys and starts receiving. With this type of link, the remote base transmitter is only 'on the air' when the user is transmitting; thus the link transmitter follows the activity of the local user, i.

    Activity heard on the remote base receiver makes the controller key the repeater transmitter and this audio is heard over the local repeater transmitter. So, immediately after the user unkeys the audio from the linked repeater is transmitted over the local repeater and you hear its courtesy tone and hang time. Since the remote base transmitter is keyed off and on, its duty cycle is really no more than the user so you don't have to be overly concerned about it burning up because of not being rated for continuous duty.

    Many times a handheld radio like the Icom ICAT on low power is plenty good enough to link to another repeater. Remember you are linking one repeater site to another and many times this path is "line of sight".

    rf link repeater

    Remote base antennas can range from a simple rubber duck when linking to another local repeater to a tower mounted beam or corner reflector for more distant sites. Remember the FCC says linking antennas need to be directional. Some link systems are frequency and band agile, meaning you can select a particular band, frequency, split, PL frequency and even power remotely.

    Some even have remotely controllable beam antennas i. Hopefully by now you see that this type of link system is just like operating a handie or mobile rig while sitting at the repeater site.With the "hard-wired" approach, the PC on which EchoLink runs is co-located with the repeater controller, and interfaced directly to it, with no additional RF hardware.

    This allows positive carrier and PTT control between the repeater controller and EchoLink, and eliminates extra "hops" in the audio chain. It also eliminates the need to ID a link transmitter. One disadvantage of this technique, however, is that it requires reliable Internet access at the repeater site, which may be in a remote location. With the "remote-link" approach, an FM transceiver is connected to the EchoLink PC at a convenient location in range of the repeater, and tuned to the frequency pair of the repeater.

    In this configuration, the transceiver behaves very much like an ordinary local repeater user, transmitting on the repeater's input frequency on behalf of EchoLink users and receiving on the repeater's output frequency.

    Although this allows the EchoLink equipment to be placed in a more convenient location, it presents some challenges with respect to RX control. With either approach, EchoLink should be configured with a callsign with a -R suffix, to indicate that the node is a gateway to a repeater, rather than a simplex frequency.

    If a remote link is being used, the software should be configured to identify itself on the air with the host station's callsign, which is not necessarily the same as the EchoLink callsign or the callsign of the repeater.

    One of the most important considerations for an EchoLink repeater node is the method of detecting the presence of a local RF signal. Several techniques are described below.

    COS from Repeater Receiver: If the node is hard-wired to the repeater controller, the best source of carrier detect is the COS output from the repeater receiver itself -- or an equivalent signal from the repeater controller. This ensures that EchoLink transmits to the Internet only when a signal is being received on the input. Also, the audio connection to the sound card should come from the receiver's audio output, rather than the repeater transmitter's audio path.

    COS from Link Transceiver: If the node is remotely located, it may be desirable to use the COS signal from the link transceiver -- but only if the repeater's "tail" is extremely short. Otherwise, EchoLink will keep transmitting to the Internet 5 to 10 seconds after the local user finishes a transmission, severely interrupting the flow of a QSO. Some repeater-node operators have successfully incorporated DTMF tones in their custom Connect and Disconnect announcements to automatically shorten the repeater's "tail" while an EchoLink station is connected, on repeaters which support this type of remote command.

    When properly adjusted, EchoLink will detect voice signals coming through the repeater, but ignore other incidentals such as the "tail", the courtesy tone, and the squelch crash at the end. This is very important when two repeaters are linked to each other, to prevent endless ping-ponging of one repeater bringing up the other. Here are some tips for adjusting the VOX for use with a repeater:. After hearing the initial welcome message from the test server, the repeater should drop normally and then remain idle.

    If the repeater continues to be keyed up by responses from the test server, re-check the above settings. When the settings are correct at both ends of a repeater-to-repeater link, both repeaters should remain idle except during an actual QSO, or while either repeater sends its ID.

    CTCSS Control: If the node is remotely located, this may be the best technique of all -- but it requires cooperation from the repeater. PL tone only while its receiver's COS is active; that is, only while a station is transmitting.

    The EchoLink transceiver is configured to open up only when this tone is received. The advantage of this system is that EchoLink triggers only on a true signal, and ignores incidentals such as courtesy tones and CW IDs.

    The disadvantage is that most PL-guarded repeaters transmit a continuous tone, even when no signal is present on the input, so it may require configuration changes to the repeater itself.

    Note that this technique can be used whether or a not a PL is required to activate the repeater.


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