A.H. Systems active monopole series Manual de operação - Página 12
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A.H. Systems Model Active Monopole Antennas
Active Monopole Calibration
The antenna factor for the rod antenna shall be determined by measuring the signal transfer
characteristics of the matching device and assuming that the antenna is a short monopole with an
infinite ground plane. Set up the monopole to be calibrated and the test equipment per Figure 3.
Allow all equipment to warm up for 15 minutes.
NOTES
If VSWR of receiver or signal generator is low, pads may not be needed or reduced to 6dB or 3dB.
With the equipment connected as shown and a 50Ω t ermination on the T-connector (A), measure
the received signal voltage V
Leaving the RF output of the signal generator unchanged, transfer the 50Ω termination to the
signal output port (B) and transfer the receiver input cable to the T-connector (A). Measure the
drive signal voltage V
Subtract V
from V
L
Records providing evidence that the required final inspection and tests are carried out shall be
maintained and shall be available for review by Customer and third party inspectors. Such records
include signed off ITPs, Job cards, Nonconformance reports, Testing reports and Inspection
reports if any.
NOTE – The signal generator does not need to be calibrated, but it shall be stable. The 50Ω
termination shall have low VSWR. The spectrum analyzer shall be calibrated and have low VSWR
A.H. Systems inc. – October 2005
REV A
in dBµV at the signal output port (B).
L
in dBµV.
D
and add 6 dB to obtain the antenna factor (in dB) of the antenna.
D
* Also referred to as a Dummy Antenna.
Figure 3
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