The installation location must also provide a suitable ground system both for RF and the
AC power supply, (if used). This is very important safety requirement for any radio trans-
mission equipment but as power increases becomes increasingly important. A good RF
ground will also help to prevent any returned RF from causing problems with the equip-
ment. Usually erratic operation of equipment when in transmission may be attributed to
RF being present or poor RF grounding. Installations where a good RF ground is not pos-
sible like operation above the ground floor may require alternative solutions such as arti-
ficial earths or the connection of 1/4 wave counterpoises to the operating equipment. Cor-
rect RF earthing techniques are however beyond the scope of this manual.
Mobile use should ensure that the ground connections are well bonded to the vehicle
chassis ground for best operation.
Operation:
Before using the amplifier the user must be familiar with all of the controls and be sure
that it has been connected correctly. Refer to Page 3 of this instruction manual.
Important!!
Before the amplifier is switched on, (switch
]
), the power output of the drive radio should
be adjusted correctly if it is capable of outputting a power greater than 6W. This may be
done with the amplifier connected but switched off. 6W is the maximum permissible in-
put power to the amplifier, but approximately 4-5W input should be sufficient to realise
full output, and an input power of 1-5W is OK as it is not necessary to run the amplifier
at full output if not required.
When the amplifier is switched on LED
`
is illuminated.
The amplifier does not have protection against excessive input power and as such the
responsibility will be with the user not to overdrive it. Maximum input should not exceed
6W. The best performance of the amplifier will be obtained if the amplifier is operated at
just less than full output which should be achieved with about 4-5W input.
If the drive radio cannot be reduced below 6W then the input attenuator should not be
used to lower the input to the amplifier. The input attenuator can , and should only be
used, to reduce the output of the amplifier if required. There are 6 levels of attenuation.
Damage will occur if the amplifier is operated above 10W input power.
When the amplifier is in transmission LED
^
is illuminated. When it is OFF the amplifier
