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A.H. Systems Model Active Monopole Antennas 

 

 

 

 

©

 A.H. Systems inc

 

REV E 

11

 

 

MAINTENANCE 

 

To ensure reliable and repeatable long-term performance, annual re-
calibration of your active monopole preamplifier by A.H. Systems’ 
experienced technicians is recommended. Our staff can recalibrate almost 
any type or brand of antenna. For more information about our calibration 
services or to place an order for antenna calibration, visit our website at 
www.AHSystems.com or call (818) 998-0223.

 

 

CLEANING

 

 

Turn off and unplug the unit before cleaning. 
 

1. 

The outside of the Active monopole antenna can be cleaned with a soft, 
damp cloth.

 

2. 

The ground plane can be removed and washed in warm soapy water 
(not dishwasher safe). Do not use abrasive cleaners as they may 
damage the surface. Dry before replacing in the unit.

 

3. 

The BNC connectors can be cleaned of dust with a small soft brush.

 

 

REPLACING THE BATTERY ASSEMBLY

 

 

Turn off and unplug the unit before changing the battery pack assembly. 
 

1. 

Remove the four 6-32 flat head screws from the bottom of the ground 
plane. 

2. 

Disconnect the battery lead from the PC card. 

3. 

Re-connect the lead from the new battery pack to the PC card. 

4. 

Snug the four 6-32 flat head screws. 

5. 

Ensure that the orientation of the amplifier box is that the input rod 
connector is facing toward the center of the ground plane. 

 
Safety: Please dispose of batteries responsibly; never dispose of batteries in a fire, 
batteries may explode or leak. 

 

Never dispose of used batteries or rechargeable batteries in 
household waste. As consumers, users are legally required to 
take used batteries to appropriate collection sites, the retail store 
where the batteries were purchased, or wherever batteries are 
sold. 

 
Disposal

: Do not dispose of this instrument in common waste. 

The user is obligated to take end-of-life devices to a designated 
collection point for the disposal of electrical and electronic 
equipment.

 

Summary of Contents for 2380

Page 1: ...A H Systems Model Active Monopole Antennas A H Systems inc REV E 1 Active Monopole Antennas User Manual ...

Page 2: ... Monopole Antennas A H Systems inc REV E 2 TABLE of CONTENTS Introduction 3 Safety Instructions 4 Specifications 5 Operating instructions 6 Calibration 8 Accessories 10 Maintenance 11 Troubleshooting 13 Warranty Information 14 ...

Page 3: ...er Description SAS 550 1B 9 kHz 60 MHz 2380 Active Monopole Antenna Battery Powered SAS 550 2B 100 Hz 60 MHz 2381 Active Monopole Antenna Battery Powered Included parts Antenna Base with ground plane Telescoping Antenna Element Battery Charger Antenna Calibration Manual Calibration data and certificate included ...

Page 4: ...ccordance with all applicable laws and regulations 4 To protect against electric shock do not immerse the power cord power plug or Antenna in water or in any other liquid 5 Do not operate the product with a damaged charger cord or charger plug or after the antenna malfunctions or has been damaged in any manner 6 This is not intended for permanent outdoor use 7 Do not allow the cord or the antenna ...

Page 5: ...s compatible with the receiver impedance ANTENNA SPECIFICATIONS SAS 550 1B Active Monopole Antenna specifications Frequency Range 9 kHz 60 MHz Antenna Factor 0 dB m Flatness 0 5 dB from 20 kHz 30 MHz 5 dB whole range Sensitivity 5 dB V m 10 kHz 20 dB V m 1 MHz Dynamic Range 96 dB 10 kHz 122 dB 1 MHz Saturation 87 dBuV m Output Connector Type BNC f Input Power 12 Vdc Battery Weight 4 7 lbs 2 1 kg S...

Page 6: ...s will not damage the battery Using the battery charger to operate the amplifier directly is not recommended Longest life and best performance can be obtained if the battery is charged when the air temperature is between 65 F and 75 F 18 24 C DO NOT charge the battery in an air temperature below 40 F 4 5 C or above 105 F 40 5 C SETUP INSTRUCTIONS The active monopole and ground plane can be mounted...

Page 7: ...ides 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 V plus the antenna factor refer to the antenna factor calibration tables plus any cable loss ANTENNA FORMULAS AND CALCULATIONS A specific antenna factor is associated with each frequency This number ...

Page 8: ...he monopole element adjusted to 1 04m m a average radius of the antenna element 6 17mm m λ wavelength in meters Ca capacitance of the dummy load NOTE Other fixtures with different capacitance are available as an option Effective Height Calculation The correction factor for the calibration is dependent on the height of the monopole The effective height is calculation is he λ 2π tan 2 π h λ Eq 2 whe...

Page 9: ...gnal voltage VD in dB V at the T connector A Also referred to as a Dummy Antenna Figure 2 2 Leaving the RF output of the signal generator unchanged transfer the 50 termination to the T connector A and transfer the receiver input cable to the signal output port B Measure the output signal voltage VL in dB V 3 The antenna factor in dB is calculated by the following equation AF dB VD VL 20 Log he Eq ...

Page 10: ...cable assembly providing repeatable reliable performance for use in a variety of commercial and industrial applications SAC 461F Cable kit for MIL STD 461 An optional cable kit is available to comply with MIL STD 461F G which includes an appropriate length cable ferrite bead and a right angle bracket to mount to the floor of the chamber ATU 510 Antenna Tripod wooden The ATU 510 wooded Tripod comes...

Page 11: ...all soft brush REPLACING THE BATTERY ASSEMBLY Turn off and unplug the unit before changing the battery pack assembly 1 Remove the four 6 32 flat head screws from the bottom of the ground plane 2 Disconnect the battery lead from the PC card 3 Re connect the lead from the new battery pack to the PC card 4 Snug the four 6 32 flat head screws 5 Ensure that the orientation of the amplifier box is that ...

Page 12: ... 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 Ye...

Page 13: ...ttery pack will not charge Bad battery pack Replace battery pack assembly Charger has no output Re connect charger Charger not plugged in Replace battery pack assembly Low response No gain Front end damage possible ESD Contact A H Systems inc SERVICE INFORMATION If you have any questions or comments regarding this unit s operation or you need technical advice repair or genuine factory replacement ...

Page 14: ...n the warranty period commencing with the delivery of the product by A H Systems The remedy set forth herein shall be the only remedy available to the buyer and in no event shall A H Systems be liable for direct indirect incidental or consequential damages This warranty shall not apply to any part of the product which without fault of A H Systems has been subject to alteration failure caused by a ...

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