Multitech GFU19 User's Guide download pdf (Page 12)

INSTALLING AND USING THE DEVICE

5. To have the device enter sleep mode, set DTR to inactive (off) on the RS-232 interface. The clear to send

(CTS) signal is off when the device is in sleep mode.

USB Cable Recommendations

If your device has a USB connector, to avoid enumeration or power issues:

■ Use a high speed USB cable that is as short as possible.

■ Use a well shielded cable with at least 24 AWG wire pair for power/ground and 28 AWG wire pair for data

lines.

■ If possible, use a USB port that connects directly to the motherboard rather than a USB port with added

cabling inside the computer chassis.

■ Use USB 3.0 ports if available. These ports are typically rated for more current.

■ You can re-order the USB cable through Multi-Tech. The part number is CA-USB-A-MINI-B-3

Mounting Device to Flat Surface

1. Locate the groove on the bottom of the device.

2. Slide the mounting rod through the groove.

3. To secure the rod to the desired surface, place and tighten two screws in the holes on either end of the

mounting rod. The dimensions illustration in this guide shows the mounting rod, as well as the

dimensions for placement of the screws.

Using Diversity

Some devices support antenna diversity. Antenna diversity uses two receive antennas to improve the downlink

connection (cell tower to mobile). It has no effect on the uplink (mobile to cell tower). Antenna diversity is useful

in environments where the signal arrives at the device after bouncing off or around buildings or other objects.

When antenna diversity is on and a like or similar antenna is installed on both radio connectors, the radio

automatically chooses the antenna with the best reception. To use this feature:

1. Connect both antennas to your device, using both antenna connectors.

2. To enable diversity, issue the AT#RXDIV=1 AT command.

12 MultiConnect

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Multitech GFU19 User's Guide Page 12