Tait TM9100 Installation Manual - 3.10
22
Installing the Radio
TM9100 110W Mobile Radio Installation Guide
© Tait LimitedOctober 2012
3.10
Checking the Installation
Warning
Danger of fire. The radio’s protection mechanisms
rely on the correct fuses on both the negative and positive power
supply leads being present. Failure to fit the correct fuses may
result in fire or damage to the radio.
Make sure that you use 30A fuses. For part numbers, refer to
“Checking the Equipment for Completeness” on page 10
.
1.
Insert the fuses into the power leads.
2.
Turn the ignition on. If necessary, switch on the radio at the control
head.
3.
Confirm that it is operational, but do not transmit.
4.
Connect an in-line power meter between the radio and the antenna.
Caution
DO NOT allow the antenna to touch or come very close to
any part of your body while the radio is transmitting.
5.
Transmit and measure the forward and reflected power levels.
The antenna system should achieve a VSWR of better than 2:1.
If VSWR is poor (3:1 or worse), the External RF Amplifier will
reduce its RF power output.
6.
If the VSWR is not better than 2:1, check the installation.
If necessary, start reducing the length of the antenna in steps of
0.1 inches to 0.2 inches (2 to 5mm). Measure the power levels at
each step. For wide-band use, tune for best performance at the top of
the band.
Notice
Some antennas are pre-tuned and must not be cut. Check with
the manufacturers’ instructions.
7.
Once the VSWR is within tolerance, make a call to another party on
the radio.