A.H. Systems Model Active Monopole Antennas
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A.H. Systems inc
REV E
12
FAQ’s
Q: Is your output connector bonded to the network case per MIL-STD 461F/G?
A: The signal output connector is bonded to the antenna matching network case.
Q: The product page states that the antenna includes an 18” ground plane but the
standard I’m testing to requires at least a 60cm ground plane?
A: Our standard monopole antennas comes with an 18” ground plane. A 24” ground
plane is also available and typically in stock.
Q: What is the ECSM calibration?
A: ECSM stands for equivalent capacitance substitution method and it’s a calibration
method that measures the insertion loss of the matching unit with an equivalent
antenna fixture (our model ECF-12K).
Q: Can the active monopole antennas be used for transmitting applications?
A: No, the active monopole antennas are a receive only antenna. Any attempt to
transmit power with damage the antenna.
Q: My telescoping rod has a BNC connector; do you still carry this part?
A: Yes, the telescoping rod with a BNC connector (P/N 2337-1) is for our older active
monopole antennas. All new active monopole antennas have been re-designed to
accept a telescoping rod with a 1/4-20 thread instead of a BNC connector. This new
connection makes for a better electrical performance as well as an improved rugged
design.
Q: Can I use a different element length?
A: Yes, however calibration results were based on a 41” (1.04 Meter) element length
and they will not be valid for different lengths. Please contact our calibration
department for a custom calibration of the active monopole with a different element
length.
Q: What type of battery is included with the active monopole antennas?
A: The active monopole antenna has a 12VDC NiMH 2000mAh battery assembly (P/N
2351-3).
Q: How long does it take to charge the batteries?
A: Every hour of charge will result in two hours of operation for up to 10 hours of
charging. Charging for up to 24 hours will not damage the battery.
Q: What is the lifetime of the battery pack?
A: That will depend on the amount of usage (charge/discharge cycles). A typical
battery pack will last 3 to 5 years
