Bogen CPT-1A - Manual (Page 3)

IM
C O M M U N I C A T I O N S , I N C .
AUTO-REVERSE
TAPE PLAYER
AND FM-STEREO/FM/AM CASSETTE
TUNER CPT-1A
IMPORTANT ANTENNA INFORMATION
Articles 810 and 820 of the National Electric Code,
ANSI/NFPA No. 70-1978 provides information regarding
antenna grounding. The CPT-IA is designed for connection
to various antenna systems as illustrated in Figures 1 through
3.
CAUnON
Use No. 8 AWG aluminum wire, or larger, as
ground wires for both mast and lead-in and
secure to building structure with insulators
spaced from 4 to 6 feet (1.22m. to 1.83m.)
apart. Mount antenna discharge unit as closely
as possible to where the lead-in enters the
building structure.
'— FM LINE ANTENNA. The CPT-1A line cord may be used as an
internal FM Line Anterma for receiving FM broadcasts (see
Figure 1). For improved reception, particularly in weak
signal areas or for tuners mounted in consoles or racks,
installation of an outdoor FM or 'T" anterma is necessary.
HI-2 AM ANTENNA WIRE
t
ANTENNA
DISCHARGE'
UNIT
INSULATOR I
INSULATED
lead - in
GROUND
CLAMP
y'
GROUNDING ELECTRODE
DRIVEN
e‘ (2.44M)
INTO THE EARTH
Figure 1 - Connecting Outdoor AM Antenna and FM Line
Antenna
EXTERNAL FM ANTENNA. If you are installing a standard
300-ohm antenna system, connect the twin-lead transmission
line as shown in Figure 2. If conditions require use of a
coaxial transmission line, such as RG-H or RG-59, coimect
the cable as shown in Figure 3. Always disconnect the FM
line anterma when using an external FM antenna.
Figure 2 - Connecting Indoor FM Antenna, 300 Ohm System
GROUND
CLAMP
MAST
GNO-
WlflE
ANTENNA
discharge
UNIT
- 7 5 n FM
ANTENNA
DOWNLEAD OR
^ lead - in wire
SHIELD
RG ll/
OR RGSS
'X GROUND
CLAMPS
GROUNDING ELECTRODE
DRIVEN 8' (2.44M)
INTO THE EARTH.
DISCONNECT
line antenna
a7*-«jr-oi
Figure 3 - Connnecting Outdoor FM Antenna, 75 Ohm
System
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