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REV 000
Made in U.S.A.
STOP:
Do not power up antenna system until tuned. (See below)
2.
Tuning:
This unit must be tuned prior to attaching to the mobile radio.
Stand antenna vertically,
as shown in Figure 2, when tuning. Tuning in the environment that the antenna will be used will
improve tuning accuracy. For example, when placing antenna in a cardboard medium the frequency will
shift down approximately 3 MHz. A significant increase in temperature will also shift the frequency down
and increase the total reflected power.
A network analyzer, site-master, or SWR meter is required so that the antenna is tuned to the correct
frequency using the match and tune adjustment until SWR is below 1.5:1 for the frequency(s) needed.
Warning: STI-CO is not responsible for damage to antenna if the antenna is not matched prior to
power being applied. STI-CO is also not responsible for damage to antenna or property if 10W
maximum input power is exceeded.
3.
Testing:
Only after being tuned
Installation testing, if required, must take place at the transmitter side of the feedline. This will ensure
that the cable connectors and cables have the proper continuity. Make sure all doors; hood, and trunk
are closed.
Note:
Some vehicles are sensitive to VHF frequencies. STI-CO suggests that you isolate feedline and
check for unwanted interference with the ignition switch on.
Reflective Power:
A measurement of reflective power using a wattmeter, you can expect up to 4%
reflected power. When results are greater than 4%, recheck tuning.
SWR:
A measurement of SWR (standing wave ratio) will yield better than 1.5:1. If greater than 1.5:1,
verify tuning.
SUGGESTED APPLICATIONS:
a. Behind sun visor with included mounting kit
b. Behind “For Sale” sign
c. Inside tissue box
d. Under ball cap
e. Countless other options
