In this link some frequently questions are placed. If this information doesn't help you, contact us at support@retemsa.com or in +34 914282547.

What kind of repeater is the most appropriate?

It depends on the area you want to cover, the received levels, the traffic it will support, etc. Our commercial department can guide you to choose the most efficiently solution according to your needs.

Do these repeaters need to be configured?

All of them except the pico-repeaters must be configured. This configuration can be carried out by means of the PCRepeater application (supplied with the equipment) and a PC with Windows OS. Its configuration is quite simple and it's explained in the manual located in the CD-ROM supplied with the repeater.

The pico-repeaters are practically plug and play. The only action you must do is to choose the gain with a switch.

A pico-repeater is already installed but there isn't coverage and the feedback LED is on.

The repeater has feedback between antennas (it has more gain than isolation). In order to solve this situation you can take three actions: 1.- increase the distance between antennas. 2.- move several degrees the antennas to increase the isolation. 3.- reduce the gain of the repeater.

I have installed a repeater but there is no coverage

If it isn't a pico-repeater, you must configure the gains using a PC. This connection is carried out with PCRepeater application and the serial connection cable (both supplied with the equipment). The gains must be 10 or 15 dB under the isolation (to know the isolation value, see below this page). If that doesn't solve your problem, contact with support department.

When I try to connect with the repeater in local mode a message “ Error Opening Serial Port ” appears.

The COM port configured is mistaken. Launch the PortConfig application and select the correct serial port where you have connected the repeater cable. This application is installed automatically with the repeater software and you can find it in StartUp->Programs->Retemsa. If you use an USB-serial adapter, you can know the serial port assigned in StartUp->Configuration->Control Panel->System->Device Manager.

When I try to connect with the repeater in local mode a message “Error Modem Configuration” appears.

The transmission is configured to be carried out by a modem. Launch the PortConfig application and unmark the “Use Modem”checkbox. This application is automatically installed with the repeater software and is located in StartUp->Programs->Retemsa.

When I try to connect with a repeater in remote mode (using a modem) a message “Error Modem Configuration” appears.

The configured COM port is mistaken and the PC can't configure the calling modem. Launch the PortConfig application and select the PC serial port where you have connected the modem cable. This application is automatically installed with the repeater software and is located in StartUp->Programs->Retemsa. If you use an USB-serial adapter, you can know the serial port assigned in StartUp->Configuration->Control Panel->System->Device Manager.

When I try to connect with a repeater a message “Error Incorrect PIN” appears.

The Personal Identification Number (PIN) is not correct. Retemsa provides a key with each repeater that the user can change once equipment is installed. The handling and custodian of this key is responsibility of each user.

When I try to connect with a repeater the application demands a router and port number that I don't know.

These textboxes are active when you select the v11 communications protocol in the PortConfig application. This protocol is used in double channel selective repeaters, dual repeaters and switched with two channels ones (you can identify them by their serial number, finished in AB or by the models, finished in xxx-C2T, xxx-C2S or xxx-SSR). In this case by default the number of router is 0 and the port 1 or 2 depending on the block you want to connect to. If the repeater you want to connect to is not one of the previous models, launch the PortConfig application (StartUp->Programs->Retemsa) and select the “Protocol Version” v10.

How can I measure the isolation between antennas with a spectrum analyzer?

For that you need a spectrum analyzer with tracking generation. Start facing the donor antenna to the base station and the coverage antenna/s to the desired zone. Connect the signal output of the spectrum analyzer to the donor antenna and the input to the coverage antenna. Select in the analyzer the frequency range of the UPLINK to amplify with the repeater (if you don't know what this range is, you can consult it in this web, in the menu of the repeater that you are installing). Select a RBW of 300KHz and select a power of 0dBm for the output. The measure that appears in the screen is the isolation value. Take the worst one. Now to configure gains of the repeater you must program 10 dB under isolation value if the repeater is GSM 900 and 15 dB under if the repeater is GSM 1800, 1900 or UMTS. In switched repeaters you can program a gain of 15dB over Isolation value if it is a channel selective switched repeater or up to 50dB over Isolation if it is a SolBoost repeater.

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*Switched technology is property of RETEMSA.