General Battery Installation Recommendations; General Electrostatic Discharge Recommendations; Fcc Requirements; Table 33: Heavy Gauge Wire Resistance Examples - Motorola ASTRO 25 GTR 8000 Manual

3.3.8.3

General Battery Installation Recommendations

Position the batteries and charger as closely as possible to the rectifier system using the cables. Use a
heavy gauge stranded cable to minimize voltage drop. Examples of the resistance of some heavy
gauge wire are:

Table 33: Heavy Gauge Wire Resistance Examples

Gauge
#6 gauge
#4 gauge
#2 gauge
The maximum voltage drop can be calculated by knowing the peak current the radio system draws.
Use the following formula:
Total Voltage drop = [Ώ/1000 ft] x [total loop length (ft)] x [Ipeak (A)] + [connector(s) voltage drop(s)]
See DC Power Connection Wire Gauge Calculations for Integrated Voice and Data on page 101
DC Power Connection Wire Gauge Calculations for HPD on page 102
cable sizing.
3.3.9

General Electrostatic Discharge Recommendations

Electronic components, such as circuit boards and memory modules, can be sensitive to Electrostatic
Discharge (ESD). Use an antistatic wrist strap and a conductive foam pad when installing or upgrading
the system.
If an ESD station is not available, wear an antistatic wrist strap. Wrap the strap around the wrist and
attach the ground end (usually a piece of copper foil or an alligator clip) to an electrical ground. An
electrical ground can be a piece of metal that literally runs into the ground (such as an unpainted metal
pipe), or the metal part of a grounded electrical appliance. An appliance is grounded if it has a three-
prong plug and is plugged into a three-prong grounded outlet.
NOTICE: Do not use a computer as a ground, because it is not plugged in during installation.
3.3.10

FCC Requirements

Radio frequency (RF) transmitters installed at sites within the US must be in compliance with the
following FCC regulations:
• The station licensee is responsible for the proper operation of the station at all times and is
expected to provide observations, servicing, and maintenance as often as may be necessary to
ensure proper operation.
• The transmitter ERP must not exceed the maximum power specified on the current station
authorization.
• The frequency of the transmitter must be checked during initial installation of the transmitter, when
replacing modules, or when making adjustments that affect the carrier frequency or modulation
characteristics.
Chapter 3: GTR 8000 Base Radio Installation
Resistance
0.3951 /1000 ft
0.2485 /1000 ft
0.1563 /1000 ft
for additional guidelines on the
MN003286A01-E
and
91