Section 3. ET Instrumentation Installation

3.3.2.2 External Installation

The following cellular kit components are used to make the external connections:

(1) Cellular Antenna

(1)9 foot Coaxial Antenna Cable

(1)Antenna Mounting Bracket

FIGURE 3.3-3. Cellular Phone Antenna Mounting

1)Mount the antenna to the ET Tower as shown in Figure 3.3-3.

2)Connect the antenna to the external coaxial bulkhead connector with the 9-foot antenna cable.

3.3.3Short-Haul Modem

Short-haul modems enable communication between a datalogger and computer over two twisted pairs of wires. The maximum distance between modems is determined by baud rate and wire gauge. At 9600 baud, the approximate range is 4.0 miles. DCE / DTE switches on the modems are set to DCE.

QC

5 05 1 E

/N S

-

32 9 C S

FIGURE 3.3-4. Short-Haul Modem Mounting and Connection

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