Instruction manual

APPENDIX A
Procedure for Mobile Field Strength Measurements
1. Assemble your measurement system:
a. Programmable field strength
meter with fresh battery
i. Block converter for
AM Broadcast band
ii. 30 dB 50 ohm pad
for strong signals
iii. Laptop
PC/software/GPS
receiver or pad/pen
to record readings
b. Calibrated Measurement
Antenna and cable:
i. Active monopole
antenna for mobile
coverage
measurements
ii. Antenna Factor table
2. Mount measurement system in/on vehicle:
a. Confirm that the measurement antenna can be mounted safely; clear of
mechanical interference and well clear of power lines.
b. Attach antenna on magnetic mount to roof of vehicle
i. Antenna location is not critical, but care should be taken to use a
good mechanical attachment, with antenna element clear of other
obstructions.
c. Route cable to block converter/meter input
i. Avoid pinch damage to the calibrated cable.
ii. Keep cable clear of vehicle operating controls.
d. Connect meter to DC power or operate from internal battery
i. Attach block converter and connect block converter power cable to
accessory DC output of meter.
ii. To minimize electrical noise interference from the vehicle, connect
the grounding terminal on the block converter to a good vehicle
ground.
e. If operating from an external switching power supply or AC/DC inverter,
confirm that power supply radiation does not interfere with measurement
accuracy. This is easily checked by switching to battery power and turning
off any external supply.
3. Enter the following information into Field Strength Meter or PC application if the
meter is connected to your laptop:
a. If making manual measurements from the FSM front panel: