PTEK April 2016
Fuses
Only fuses with the same required current, voltage rating, and specified type (normal
blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuse
holders. To do so could cause a shock or fire hazard.
Output Connector
Warning: The type-N output connector carries dangerously high RF
voltages that present shock and burn hazards. Never operate the exciter
without properly terminating the output connector in either an adequately
rated load or antenna.
Electrostatic Discharge (ESD)
A sudden discharge of electrostatic electricity can destroy static-sensitive devices or
micro-circuitry. Proper packaging and grounding techniques are necessary precautions to
prevent damage. Always take industry-standard precautions.
Grounding Methods
The single point or star grounding system is recommended. There is one common or star point
where all grounds join together at a single point. This point is often a selected point along a
ground system that encircles the building using copper strap and multiple ground rods not closer
than ten feet. Usually four ground rods connected with four inch copper strap spaced around the
tower will be required. Wide flat copper strap should be used to reduce the ground conductor
inductance.
The interior of the building should have a common ground system made up of 2 or 4 inch copper
ground strap, which should be tied to the outside star point. The AC mains ground should also be
connected to the star point. All coaxial cables should enter and exit the building at a single entry
point and their shield(s) should be connected to the ground plate.
A single connection point to the station reference ground should be established, preferably where
the AC power wiring and the RF feed coaxial cable enter the transmitter building. The purpose
of this ground is to prevent ground loops and to ensure unwanted currents do not flow into the
transmitter cabinet. The shield of the RF feed cable, the AC power, the ground return for the AC
suppression system and the transmitter’s reference ground point should all be individually
connected to this point by insulated, low inductance, low impedance ground straps.
