ADS Environmental Services Spider QR 775010 A0 - Manual (Page 22)

ADS Environmental Services ADS Spider User Manual
Page 20
Spider. If a non-ADS antenna is installed, it must be suitable for use
with, at a minimum, the dual band (850/1900 MHz) U.S. frequencies.
It also must have a VSWR (Voltage Standing Wave Ratio) of less
than or equal to 2:1 and be fitted with a female FME-type connector.
Gain cannot exceed 3db.
Two types of quad-band antennas are available from ADS for use
with the Spider: a magnetic mount whip and a low profile
“
wing
”
.
Extension cables are also offered in 10-, 25-, and 50- foot lengths.
Always use the minimum cable length to prevent signal loss.
The following image displays the two kinds of direct burial antennas
(P/N 507385) that support the Spider: the wing (top) and the slim
(bottom). The slim antenna is interchangeable with the wing (top)
antenna. The only difference between them exists in the location at
which the cable exits the element. Both antennas can be embedded
directly into road surfaces (and sealed with asphalt) or buried in soil
or most other landscaping materials. They also can be mounted
covertly onto trees, posts, or other structures that provide the most
security and maximum height to ensure the best reception.