USER MANUAL
DEU (Data Extending Unit) User Manual December 99
Table of Contents Introduction................................................................................ 4 Physical Appearance ................................................................. 5 Recommendations for optimum performance ......................... 6 Extra coverage ........................................................................... 7 Mounting two DEU s................................................................ 8 Mounting Surfaces ...............................................
1. Introduction The DEU (Data Extending Unit) is a versatile combination of both a transmitter and receiver that is designed to extend the range of the GMU (Group Monitoring Unit). The DEU’s unique design assists in eliminating blind spots (areas where the GMU cannot receive a transmission) between the Tx (transmitter) and the GMU. The DEU’s effectiveness is its ability to receive weak transmissions that would not otherwise reach the GMU because of poor site locations e.g.
2. Physical Appearance • A 110V AC / 7.5V DC external power source powers the unit. • An internal battery offers 4 hours of operation life in the event that external power is removed. The faceplate of the DEU comprises of 4 Leds (light emitting diodes), 2 antennae’s for optimum reception and an on/off key switch.
• On-Off Key: The DEU is switched on and off by turning the On-Off key to the appropriate position, upward for off and sideways for on. 3. Recommendations for optimum performance The most important consideration of the DEU is its placement. It should be mounted in an area, in which the transmission signal is still prominent in order to receive and boost the signal effectively onwards towards the GMU.
4. Extra coverage The DEU assists the GMU in its ability to receive transmissions that the GMU may not have received due to site hazards (pillars, toilets etc), thereby providing an extra receptive coverage range for the GMU.
5. Mounting two DEU’s (One) In the event where one DEU does not provide sufficient coverage, a second DEU may be mounted. (Two) Attempt to mount the DEU’s in line of sight with each other, with the GMU appearing in between them. (Three) Try to ensure that each DEU’s transmission range is not received by the other DEU. Two DEU’s receive transmissions from Tx’s out of the GMU’s reception range and transmits them inwards towards the GMU.
6. Mounting Surfaces Preferably a wall or flat surface with a power outlet within reach (non-metallic surface). 7. Mounting Procedure The mounting procedure of the DEU is very simple. It dismisses the need for screws, mounting tools etc as well as the responsibility of having to fix the DEU in one fixed spot. The mounting procedure offers portability if need be. There are 3 variables to mounting the DEU namely mounting brackets, a black ‘velcro’ grip and a transparent ‘velcro’ grip.
Moving the DEU to another location By relieving the grip between the bristles of both ‘velcro’s, the DEU can now be freed to be mounted somewhere else. Turn the DEU onto its faceplate with the brackets facing upwards. Using a spare transparent ‘velcro’ firmly press the bristles of the two ‘velcro’s’ together. By peeling off the sticky end of the transparent ‘velcro’, the DEU may be mounted else-where.
FCC Notice This equipment has been tested and found to comply with the limits of a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy and, if installed and used in accordance with the instruction, may cause harmful interference to radio communications.