Hitachi ur 18dsl Technical Data And Service Manual page 6

Broadcast station
Distance from station
(km)
Output (kW)
UR 18DSL
Outdoor
M
UR 18DSL
Indoor
M
=>The reception sensitivity data indicates that the UR 18DSL has higher sensitivity than product M. The
evaluation results based on listening indicate that the UR 18DSL and product M provide equivalent
sensitivity when used outdoors to receive broadcasts from nearby stations, but for outdoor reception of
broadcasts from stations at a middle distance (of about 100 km), the UR 18DSL provides higher
sensitivity than product M.
Similarly for indoor reception, both radios provide equivalent sensitivity for reception from nearby
stations. The UR 18DSL, however, provides higher sensitivity than product M for reception from stations
at a middle distance (of about 100 km).
* Radio reception varies depending on time zone, weather, and other environmental conditions (including
the effects of electric appliances, fluorescent lamps, and personal computers).
About the reception sensitivity of the long rod FM antenna
Broadcast station
Outdoor radio waves
are very intense.
F
5.5
(short distance) (middle distance)
1
5
5
5
5
{5: Excellent, 4: Good, 3: Average, 2: Poor, 1: Unusable}
Intensity of radio wave becomes
lower as the wave travels farther.
away from the station
Use of a long antenna enables the
Short distance
reception of low-intensity radio.
wave better.
Urban center
G
94 108
(middle distance)
5
4
3
3
2
Long distance
.
Entering radio waves are fully
blocked or weakened by
buildings. walls.
Use of a long antenna enables the
reception of low-intensity radio.
wave better.
-3-
No. of receivable
H broadcasts
(at grade 3 or better)
-
10 -
2 8 stations
1 4 stations
2 5 stations
1 2 stations
Suburb
Reinforcing bars and
steel frames block
radio waves.