Digital Watchdog D2365T Instrukcja Instalacji Pobierz pdf (Strona 5)

Duet2 D2600 / Duet3 D2650 Installation Manual – EU-D2600-D2650-INST/A10/v1 - 5

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3. Site Survey

It is strongly recommended that a site survey is conducted prior to the installation of a

Duet to confirm that adequate GPRS signal strength is available at the site.

If there is no GPRS radio coverage at the proposed site, the Duet radio alarm reporting path will not

operate.

You can use a Duet, aerial and fully charged battery to survey the proposed site for the point of

strongest signal. See Aerial Siting on Page 13 for more information. Make a note of this point and use

it when installing the Duet aerial.

The preferred method of determining whether the site has an acceptable signal is to use the Dycon

D2366 Test Meter, which will show signal strength, Bit Error Rate and other relevant parameters.

You can also use a mobile GSM telephone to show GSM signal strength. It MUST use the same

GSM network as the Duet’s SIM Card uses. A portable GPRS telephone that uses a different

network will not show the correct signal strength.

Fig 2

Fig 3 - PSTN Connections Fig 4 - Using the D2355 Wired LAN Card

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Eject Button

SIM Card Carrier

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Aerial Converter

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Digital Watchdog D2365T Instrukcja Instalacji Strona 5