A.H. Systems AK-40G User manual

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
1
AK-40G
Antenna Kit
Operation Manual

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
2
TABLE OF CONTENTS
INTRODUCTION
3
SAFETY INSTRUCTIONS
4
SPECIFICATIONS
5
ASSEMBLY AND MOUNTING INSTRUCTIONS
8
TYPICAL DATA
11
ANTENNA FORMULAS AND CALCULATIONS
17
MAINTENANCE
19
WARRANTY INFORMATION
20

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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INTRODUCTION
Included equipment:
Model
Number
Description
Frequency
Range
Correction
Factor
TSC-542
Transit Storage Case
SAS-510-2
Log Periodic Antenna
290 MHz –2000 MHz
14 to 32
SAS-542
Biconical Antenna
20 MHz –330 MHz
9 to 23
SAS-550-1B
Active Monopole Antenna
9 KHz –60 MHz
-1 to 3
SAS-560
Passive Loop Antenna
20 Hz –2 MHz
18 to 15
SAS-571
Double Ridge Guide Horn Antenna
700 MHz –18 GHz
22 to 45
SAS-574
Double Ridge Guide Horn Antenna
18 GHz –40 GHz
40 to 41.5
BCP-610
Current Probe
20 Hz –20 MHz
-65 to –28
BCP-611
Current Probe
10 KHz –150 MHz
-25 to 5
SAC-18G-3
3 Meter N/N Cable, Low Loss
Up to 18 GHz
3.5 dB @ 18 GHz
SAC-40G-1.5
1.5 Meter 2.9mm/2.9mm Cable, Low loss
Up to 40 GHz
10.5 dB @ 40 GHz
ADP-202
N(f) to BNC(m) Adapter
ADP-203
N(f) to SMA(m) Adapter
ATU-510
Wood Tripod
AEH-510
Azimuth and Elevation Head
TCC-511
Tripod Carrying Case
OPTIONAL EQUIPMENT
PAM-0118P
Preamplifier
20 MHz –18 GHz
37 dB Gain
SAC-18G-0.5
0.5 Meter N/N Cable, Low Loss
Up to 18 GHz
1.5 dB @ 18 GHz
PAM-1840
Preamplifier
18 GHz –40 GHz
20 dB Gain
SAC-40G-0.5
0.5 Meter 2.9mm/2.9mm Cable, Low loss
Up to 40 GHz
4.5 dB @ 40 GHz

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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SAFETY PRECAUTIONS
This equipment is intended for general laboratory use in a wide variety of industrial and
scientific applications and designed to be used in the process of generating, controlling
and measuring high levels of electromagnetic Radio Frequency (RF) energy. It is the
responsibility of the user to assure that the device is operated in a location which will
control the radiated energy such that it will not cause injury and will not violate regulatory
levels of electromagnetic interference. To reduce the risk of fire, electric shock and/or
injury to persons, basic safety precautions should always be followed when using
electrical devices, including the following:
1. READ ALL INSTRUCTIONS BEFORE OPERATING THE ACTIVE MONOPOLE
ANTENNA.
2. Use the antenna only as specified.
3. Please dispose of batteries responsibly and in accordance 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 to rest on or near hot surfaces such as a hot
gas or electric burner or a heated oven.
8. Disconnect the charger from the active monopole when not in use and before user
servicing and cleaning.
9. Do not use this product for anything other than its intended use.
RANGE OF ENVIRONMENTAL CONDITIONS
This equipment is designed to be safe under the following environmental conditions:
Indoor use
Altitude: up to 2 km
Temperature: 5C to 40C
Maximum relative humidity: 80% for temperatures up to 31C.
Decreasing linearly to 50% at 40C
Pollution degree 2: Normally non-conductive with occasional
condensation.
While the equipment will not cause hazardous condition over this environmental range,
performance may vary.

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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SPECIFICATIONS
GENERAL DESCRIPTION
The A.H. Systems AK-40G antenna kit series consist of five E-field antennas,
one magnetic loop antenna, and two current probes. Each of the antennas and
probes are provided with calibrations when connected to a 50-ohm input
receiver or spectrum analyzer.
Each of the E-field antennas mount directly to the tripod azimuth and elevation
head. The azimuth and elevation head allows the operator to vary the antenna
azimuth (direction) and to change the antenna polarity (vertical or horizontal).
Cables and an adapter are provided to connect each antenna and probe to
either a BNC or N type connector on the receiver. Cable calibrations are
supplied.
To obtain the field strength of the signal being measured, the operator must add
the receiver reading in dBuV, the antenna factor in dB, and the cable
attenuation in dB. This yields the field strength in dBuV/m. Calibrations for the
E-field antennas are supplied at appropriate spacings (1, 3, and 10 meter) to
comply with various specification requirements.
ANTENNA SPECIFICATIONS
SAS-510-2 Log Periodic Antenna specifications:
Frequency Range ........................................................................... 290 MHz –2 GHz
Antenna Factor .......................................................................................14 to 32 dB/m
Antenna Gain.....................................................................................................6.5 dBi
Maximum Continuous Power......................................................................1000 Watts
Average Beamwidth.................................................................................................45°
Average Beamwidth (H-Field)................................................................................100°
Impedance (nominal)............................................................................................. 50
Average VSWR........................................................................... 1.45:1 typ. 2.2:1 max
Maximum Radiated Field.................................................................................200 V/m
Connector ........................................................................................... N-Type (female)
Mounting ...............................................................................................1/4-20 (female)
Weight .................................................................................................1.4 lbs. (0.64 kg)
Size (L x W x H).......................................22.5" x 20.1" x 2.5” (57.2 cm x 51cm x 6.3cm)
SAS-542 Biconical Antenna specifications:
Frequency Range .........................................................................20 MHz –330 MHz
Antenna Factor ......................................................................................8.5 to 21 dB/m
Antenna Gain...........................................................................................-22 to 2.8 dBi
Impedance (nominal)............................................................................................. 50
Average VSWR.............................................................................................. 2.0:1 typ.
Maximum Continuous Power............................................................................1 Watts
Connector ........................................................................................... N-Type (female)
Mounting ...............................................................................................1/4-20 (female)
Weight .................................................................................................4.3 lbs. (1.95 kg)
Size (W x H)....................................................................52.75" x 29" (134cm x 73.7cm)

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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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
Size (W x H x D) .......................................18" x 18" x 41" (46 cm x 46 cm x 104 cm)
SAS-560 Passive Loop Antenna specifications:
Frequency Range ..............................................................................20 Hz –2 MHz
Turns .....................................................................................................36 (7-41 Litz)
Resistance ........................................................................................... 10 , nominal
Inductance ......................................................................................................410 H
Shielding ................................................................................................Electrostatic
Connector Type ...............................................................................................BNC(f)
Weight ..........................................................................................0.2 lbs. (90 grams)
Loop Diameter .....................................................................................5.25" (13.3cm)
SAS-571 Double Ridge Guide HornAntenna specifications:
Frequency Range ........................................................................700 MHz - 18 GHz
Antenna Factor .................................................................................... 22 to 44 dB/m
Average Gain ...................................................................................................12 dBi
Maximum Continuos Power........................................................................300 Watts
Peak Power.................................................................................................500 Watts
Average Beamwidth (E-Field)............................................................................... 48
Average Beamwidth (H-Field) .............................................................................. 30
Impedance (nominal)..........................................................................................50 
Average VSWR...................................................................................................1.5:1
Maximum Radiated Field: ............................................................................ 200 V/m
Connector: ........................................................................................N-type (female)
Mounting ........................................................................................... 1/4-20 (female)
Weight ..............................................................................................3.5 lbs. (1.59 Kg)
Size (W x H x D) ..........................................11" x 5.6" x 9.6" (28cm x 14.cm x 24.4cm)
SAS-574 Double Ridge Guide Horn Antenna specifications:
Frequency Range .................................................................................. 18 - 40 GHz
Antenna Factor .................................................................................... 40 to 41 dB/m
Average Gain ..........................................................................................15 to 21 dBi
Maximum Continuos Power..........................................................................10 Watts
Maximum Radiated Field: ............................................................................ 150 V/m
Impedance (nominal)..........................................................................................50 
Average VSWR...................................................................................................1.2:1
Connector: ........................................................................................2.9mm (female)
Mounting ........................................................................................... 1/4-20 (female)
Weight ............................................................................................0.2 lbs. (90 grams)
Size (W x H x D) ............................................ 1.2" x 1.6" x 3.5" (3cm x 4.1cm x 9.8cm)
BCP-610 RF Current Probe specifications:
Frequency Range ............................................................................20 Hz –20 MHz

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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Transfer Impedance ....................................................................-63 to -28 dB ohms
Max Primary Current (DC –60 Hz) ............................................................800 Amps
Max Primary Current (400 Hz) ...................................................................400 Amps
Max Primary Current (CW) ........................................................................220 Amps
Max Primary Current (Peak) ...................................................................5,000 Amps
Output Connector Type ...............................................................................N-Type(f)
Weight .............................................................................................1.4 lbs. (0.65 kg)
Aperture ............................................................................................... 1.25" (3.2cm)
BCP-611 RF Current Probe specifications:
Frequency Range ........................................................................10 kHz –150 MHz
Transfer Impedance ..................................................................... -20 to +5 dB ohms
Max Primary Current (DC –60 Hz) ............................................................800 Amps
Max Primary Current (400 Hz) ...................................................................450 Amps
Max Primary Current (CW) ............................................................................4 Amps
Max Primary Current (Peak) ......................................................................100 Amps
Output Connector Type ...................................................................................BNC(f)
Weight .............................................................................................1.4 lbs. (0.65 kg)
Aperture ............................................................................................... 1.25" (3.2cm)
SAC-18G-3 Low-Loss 3 Meter N/N Cable specifications:
Frequency Range ................................................................................ DC –18 GHz
Impedance ....................................................................................................50 ohms
Capacitance.................................................................................................24 pF / ft.
Time Delay................................................................................................. 1.2 nS / ft.
Velocity.................................................................................................................84%
RF Leakage .................................................................................................. > 100dB
Typical VSWR.....................................................................................................1.4:1
Connector Type...................................................................................Precision N(m)
Cable Size (O.D.)..............................................................................0.310”(7.87 mm)
Weight..........................................................................12.5 lbs. / 100 ft (5.6 Kg / 30m)
Minimum Bend Radius.................................................................................. 2" (5 cm)
SAC-40G-1.5 Low-Loss 1.5 Meter N/N Cable specifications:
Frequency Range ................................................................................ DC –43 GHz
Impedance ....................................................................................................50 ohms
Capacitance.................................................................................................24 pF / ft.
Time Delay................................................................................................. 1.2 nS / ft.
Velocity.................................................................................................................84%
RF Leakage ............................................................................> 100dB up to 18 GHz
.......................................................................................................> 80dB to 40 GHz
Typical VSWR................................................................................ < 1.4:1 to 18 GHz
....................................................................................................... < 1.5:1 to 40 GHz
Connector Type......................................................................................... 2.9mm (m)
Cable Size (O.D.)..............................................................................0.145”(3.68 mm)
Weight...............................................................................3 lbs. / 100 ft (1.3 Kg / 30m)
Minimum Bend Radius...........................................................................0.5" (1.27 cm)
ATU-510 Wooden Tripod specifications:
Max Height ..............................................................................................64”(163 cm)
Min Height...............................................................................................12”(30.5 cm)
Max Load...........................................................................................60 lbs. (27.2 Kg)
Folded Dimensions......................................................40”x 6”x 6”(101 x 15 x 15 cm)
Weight...............................................................................................11.3 lbs. (5.1 Kg)

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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ASSEMBLYAND MOUNTING INSTRUCTIONS
E-FIELD ANTENNAS
SAS-510-2 Log Periodic Antenna 290 MHz - 2000 MHz
The log periodic antenna comes assembled and ready to use.
Mounting: Attach the antenna to the tripod azimuth and elevation head
through the screw hole in the antenna base. Connect a cable between the
antenna connector and the receiver. The log periodic beamwidth is 65
degrees and it should be pointed or aimed in the direction that the received
signal is coming from.
SAS-542 Biconical Antenna 20 MHz - 330 MHz
The biconical antenna consists of the SAS-542 balun assembly, two folding
biconical elements and a balun clamp.
Mounting: Attach the antenna balun clamp (ABC-B) to the top of the tripod
with the ¼-20 thread. Insert the antenna balun into the clamp and secure.
Screw the two biconical elements into the 'tee' end of the balun assembly.
Open the antenna elements completely and secure in open position by
tightening the knurled knobs in the element caps. Connect a cable between
the antenna connector and the receiver. The biconical beampattern is similar
to a dipole response.
SAS-550-1B Active Monopole Antenna 10kHz - 60 MHz
The active monopole antenna consists of a ground plane upon which are
mounted a preamplifier with internal rechargeable battery pack for battery
operation, and a telescoping rod antenna.
Mounting: Mount the antenna on the tripod. Connect an external ground to
the ground plane if called out in test specification. Attach the telescoping rod
to the connector on the amplifier top and extend to desired length (typically
41”or 1 meter depending on test specification). Connect the output on
amplifier side to the receiver using a cable. Apply power to the antenna by
switching activating the power switch. If the Red LED does not illuminate then
the antenna will require charging. The active monopole antenna is omni-
directional.
SAS-571 Double Ridge Guide HornAntenna 700MHz - 18 GHz
SAS-574 Double Ridge Guide Horn Antennas 18 GHz –40 GHz
The SAS-574 horn antenna comes assembled and ready to use. The SAS-
571 antenna mounting bracket is attached to the antenna backwards to
protect the RF connector and fit in the carrying case. The bracket must be
removed from the antenna, turned over (so that the bracket leg faces away
from the antenna), and re-attached to the antenna. (The bracket is not
needed for mounting if the tripod being used has an Azimuth/Elevation Head.)
Mounting: Attach the antenna to the tripod azimuth and elevation head
through the hole on the antenna bottom or the hole in the mounting bracket.
The ridge guides determine the antenna polarity: for horizontal polarity they
should be parallel to the ground, for vertical polarity they should be

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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perpendicular to the ground. Connect a cable between the antenna
connector and the receiver. NOTE: BE SURE TO USE A CABLE RATED
FOR HIGH FREQUENCY WHEN OPERATING ABOVE 5 GHz (for example,
the SAC-18G-3 or SAC-40G-1.5).
MAGNETIC LOOPANTENNA
SAS-560 Magnetic LoopAntenna 20 Hz - 2 MHz
The loop antenna does not require any assembly.
Operation: The loop antenna is designed to be held by hand and moved
around each surface if the EUT to measure magnetic radiation. Connect the
antenna via a cable to a receiver with either a 50-ohm input or high
impedance (10 K ohm or greater) input. Calibrations for both inputs are
provided.
CURRENT PROBES
BCP-610 LF Current Probe 20 Hz - 20 MHz
BCP-611 HF/VHF Current Probe 10 kHz - 150 MHz
The current probes come ready for use.
Operation: The two current probes measure conducted emissions when
clamped around a single conductor, cable or a bundle of conductors.
Disconnect the probe latch Position the probe around the conductor and
close the probe. Reconnect the probe latch to ensure that the probe is tightly
closed. Connect the probe connector to the receiver with a cable. The probe
calibrations supplied are into a 50-ohm receiver.
TRIPOD AND MOUNTING ADPTERS
ATU-510 Tripod
AEH-510 Azimuth and Elevation Head
The azimuth and elevation head (AEH-510) mounts to the tripod (ATU-510)
top and allows the antennas to be rotated 360 degrees and tilted between
horizontal and vertical polarization. The tripod and azimuth and elevation
head come in their own carrying case. Each tripod leg is independently
adjustable in angle and length to facilitate antenna height setting. The tripod
legs have a rubber tip on one end for indoor or hard surface use, and a metal
spike on the other end for outdoor soft surface (such as dirt) use.
TRANSIT STORAGE CASES
TCC-511 Tripod Carrying Case
TSC-542 Transit Storage Case
The antenna carrying case (TSC-542) prevents damage and loss of
antennas when storing or transporting the antenna kit. The case is
constructed of lightweight and durable polyethylene. Two case keys are
provided with the case.

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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OPTIONAL EQUIPMENT
The AK-40G case comes with three additional cutouts for optional
preamplifiers. In order to improve overall system sensitivity, the following
equipment will be required:
•PAM-0118P with an SAC-18G-0.5
•PAM-1840 with an SAC-40G-0.5
PAM-0118P Preamplifier 20 MHz –18 GHz
The preamplifier will increase the system sensitivity 37 dB and is recommend
for the SAS-510-2, SAS-530,542 and SAS-571. An optional short length
cable (SAC-18G-0.5), is required to connect the preamplifier to any 50-ohm
receiver or spectrum analyzer.
SAC-18G-0.5 Low-Loss Cable up to 18 GHz
The Low-Loss, High Frequency cable is recommended for connecting the
optional preamplifier to any 50-ohm receiver or spectrum analyzer. Our Low-
Loss High-Frequency flexible cables are the preferred choice over standard
cable types. With improved power handling, low VSWR, and high frequency
capabilities, the Low-Loss cables can be made to your specified length and
delivered in two days. The 0.5-meter SAC-18G-0.5 has a typical attenuation
of 1.0 dB at 18GHz.
PAM-1840 Preamplifier 18 GHz –40 GHz
The preamplifier will increase the system sensitivity 20 dB and is recommend
for the SAS-574. An optional short length cable (SAC-40G-0.5), is required
to interconnect the preamplifier to any 50-ohm receiver or spectrum analyzer.
SAC-40G-0.5 Low-Loss Cable up to 40 GHz
The Low-Loss, High Frequency cable is recommended for connecting the
optional preamplifier to any 50-ohm receiver or spectrum analyzer. Our Low-
Loss High-Frequency flexible cables are the preferred choice over standard
cable types. With improved power handling, low VSWR, and high frequency
capabilities, the Low-Loss cables can be made to your specified length and
delivered in two days. The 0.5-meter SAC-40G-0.5 has a typical attenuation
of 4.5 dB at 40GHz.

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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TYPICAL DATA

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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ANTENNA FORMULAS AND CALCULATIONS
E-FIELD ANTENNAS
Add antenna factor plus cable loss to receiver reading in dBuV to convert to field
strength in dBuV/meter.
Field Strength(dBuV/m) = SA(dBuV) + AF(dB/m) + cable loss (dB)
LOOP ANTENNA
dBpT = dBuV + dBpT/uV + Cable Loss
dBuV/m = dBpT + 49.5 dB
BROADBAND CURRENT PROBES
A specific Transfer Impedance Factor is associated with each frequency. This number is
to be subtracted from the receiver reading in order to convert to dBuA
dBA = dBV (from Receiver) - Transfer Impedance (dB) - cable Loss (dB)
EXAMPLE:
Assume that the frequency of interest is 80 KHz and we need to find the current at this
frequency. Connect the probe per figure 1
Frequency: 80 KHz
Transfer Impedance: -2.76 dB ohms
Cable Loss: 0.1dB
Receiver Reading: -33.0dBuV
dBA = dBV (from Receiver) - Transfer Impedance (dB) - cable Loss (dB)
dBA= -33.0 - (-2.76) - - 0.1
dBA= -30.14

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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TYPICAL CONVERSION FORMULAS
LOG -> LINEAR VOLTAGE
FIELD STRENGTH & POWER DENSITY
dBV to Volts
V = 10 ((dBV –120) / 20)
dBV/m to V/m
V/m = 10 (((dBV/m) -120) / 20)
Volts to dBV
dBV = 20 log(V) + 120
V/m to dBV/m
dBV/m = 20 log(V/m) + 120
dBV to Volts
V = 10 (dBV / 20)
dBV/m to dBmW/m2
dBmW/m2= dBV/m –115.8
Volts to dBV
dBV = 20log(V)
dBmW/m2to dBV/m
dBV/m = dBmW/m2+ 115.8
dBV to dBV
dBV = dBV +120
dBV/m to dBA/m
dBA/m = dBV/m –51.5
dBV to dBV
dBV = dBV - 120
dBA/m to dBV/m
dBV/m = dBA + 51.5
LOG -> LINEAR CURRENT
dBA/m to dBpT
DBpT = dBA/m + 2
dBA to uA
A = 10 (dBA / 20)
dBpT to dBA/m
dBA/m = dBpT –2
A to dBA
dBA = 20 log(A)
W/m2to V/m
V/m = SQRT(W/m2* 377)
dBA to A
A = 10 (dBA / 20)
V/m to W/m2
W/m2= (V/m)2/ 377
A to dBA
dBA = 20log(A)
T to A/m
A/m = T / 1.25
dBA to dBA
dBA = dBA + 120
A/m to T
T = 1.25 * A/m
dBA to dBA
dBA = dBA -120
E-FIELD ANTENNAS
LOG -> LINEAR POWER
Correction Factor
dBV/m = dBV + AF
dBm to Watts
W = 10((dBm –30)/10)
Field Strength
V/m = 30 * watts * Gain numeric
meters
Watts to dBm
dBm = 10log(W) + 30
Required Power
Watts = (V/m * meters)2
30 * Gain numeric
dBW to Watts
W = 10(dBW / 10)
LOOP ANTENNAS
Watts to dBW
dBW = 10log(W)
Correction Factors
dBA/m = dBV + AF
dBW to dBm
dBm = dBW + 30
Assumed E-field for
shielded loops
dBV/m = dBA/m + 51.5
dBm to dBW
dBW = dBm - 30
dBpT = dBV + dBpT/V
TERM CONVERSIONS
dBm to dBV
dBV = dBm + 107 (50)
dB  V = dBm + 10log(Z) + 90
CURRENT PROBES
dBV to dBm
dBm = dBV –107 (50)
dBm = dB  V –10log(Z) –90
Correction Factor
dBA = dBV –dB(ohm)
dBm to dBA
dBA = dBm –73 (50)
dB  A = dBm –10log(Z) + 90
Power needed for injection probe given voltage(V) into
50load and Probe Insertion Loss (IL)
dBA to dBm
dBm = dBA + 73 (50)
dBm = dB  A + 10log(Z) –90
Watts = 10 ((IL+ 10log(V2/50))/10)
dBA to dBV
dBV = dBA + 34 (50)
dB  V = dB  A + 20log(Z)
dBV to dBA
dBA = dBV –34 (50)
dB  A = dB  V –20log(Z)

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
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MAINTENANCE
MAINTENANCE PROCEDURES
Proper antenna maintenance should include:
Visual inspection of RF connectors
Check for loose or missing hardware
Check for corrosion near the joints
At least once a month it is a good idea to wipe down the antenna with a damp
rag.
ANNUAL CALIBRATION
To ensure reliable and repeatable long-term performance, annual re-calibration
of your antennas, preamplifiers and current probes by A.H. Systems
experienced technicians is recommended. Our staff can calibrate almost any
type or brand of antenna.
It is always up to the user to determine the appropriate interval for calibration
certification based on the requirements of the end user’s specific
test/application. The calibration of EMC antennas is important for those
conforming to compatibility standard. Radiated emissions testing for
electromagnetic compatibility (EMC) requires the measurement of electric field
(E-field) strength, which is compared with a limit level. The output voltage of an
antenna is converted to E-field strength via its antenna factor, the measurement
of which must include the uncertainty components related to that particular
antenna, taking into consideration the environment in which the antenna is to be
used for the testing. Most standards will specify the appropriate interval for re-
calibration of your EMC antenna.
In some cases, these antennas are used for a manufacturer’s pre-compliance
testing, field monitoring, surveillance and/or other applications where the exact
field intensity of the received signal is not of importance. For those customers a
yearly re-calibration is not necessary, however it is recommended that an
interval for maintenance be performed.
For more information about our calibration services or to place an order for
antenna calibration visit our website at http://www.AHSystems.com
or call 1(818) 998-0223.

A.H. Systems AK-40GAntenna Kit
©A.H. Systems inc. –REV C
20
WARRANTY INFORMATION
A.H. Systems Inc., warrants that our Antennas, Sensors and Probes will be free from
defects in materials and workmanship for a period of three (3) years. All other products
delivered under contract will be warranted for a period of two (2) years. Damage caused
by excessive signals at the product's input is not covered under the warranty. A.H.
Systems' obligation under this warranty shall be limited to repairing or replacing, F.O.B.
Chatsworth, California, each part of the product which is defective, provided that the
buyer gives A.H. Systems notice of such defect within 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 part not supplied by A.H.
Systems, accident, fire or other casualty, negligence, misuse or normal wear of
materials.
Except for the warranty set forth above, there are no other warranties, expressed or
implied, with respect to the condition of the product or it's suitability for the use intended
for them by the buyer.
For prompt service, please contact our service department for a Return Material
Authorization Number before shipping equipment back to us.