Atec AH-Systems-SAS-550-1B - Manual (Page 6)

A.H. Systems Model Active Monopole Antennas
OPERATING INSTRUCTIONS
ASSEMBLY INSTRUCTIONS
To prepare the antenna for operation, attach the telescoping rod antenna
element to the top of the high impedance preamplifier. Connect the rod antenna
by pushing straight down on the female connector on top of the amplifier. Do
not apply excessive sideways force, as this can cause the antenna center-pin to
break. Do not operate the Monopole antenna with the Battery Charger
connected.
SETUP INSTRUCTIONS
The amplifier and ground plane can be mounted to any tripod with a 1/4-20
attaching stud. Attach the rod antenna to the connector on the top of the
amplifier. Extend the rod antenna to 41" (104 cm) above the ground plane.
Connect the output BNC connector on the side of the amplifier to the input of a
50
Ω receiver or spectrum analyzer. Establish a ground connection to the
ground plane if required by the test specification.
NOTE: The on/off toggle switch is a locking type to prevent
accidental turn-on or turn-off. Pull out on the toggle handle
and push up to turn the amplifier power on. Pull out and
push down to turn it off.
The POWER indicator LED will illuminate and stay lit as long as the battery has
sufficient voltage to power the preamplifier. If the LED does not illuminate, do
not use the preamplifier until the battery has been recharged.
GENERAL USE INSTRUCTIONS
The calibration tables shown provide a listing of the frequency of operation and
its antenna factor in dB/m. The field strength is the receiver voltage in dB
µ V
plus the antenna factor (refer to the antenna factor calibration) plus any cable
loss. When making a measurement, mount the antenna on an appropriate mast
or tripod. Ensure that the active monopole antenna is turned on and use the
appropriate correction factors. The active monopole antenna is easy to set up
and provides good reception with a minimal need for space. Its flat 0 dB
antenna factor makes it a convenient choice when calculating the field intensity.
The signal field strength is the receiver voltage in dB
µ V plus the antenna factor
(refer to the antenna factor calibration tables) plus any cable loss.
 A.H. Systems inc. – January 2007
REV B
6