Electro-Metrics SHL-30 User manual

INSTRUCTION MANUAL
LOOP ANTENNA
MODEL SHL-30
20 Hz –30 MHz

INSTRUCTION MANUAL
THIS INSTRUCTION MANUAL AND ITS
ASSOCIATED INFORMATION IS
PROPRIETARY. UNAUTHORIZED
REPRODUCTION IS FORBIDDEN.

1995ELECTRO-METRICS CORP.
LOP ANTENNA
20 Hz –30 MHz
ELECTRO-METRICS
MODEL ALP-70
SERIAL NO: N/A
ELECTRO-METRICS CORPORATION
231 Enterprise Road, Johnstown, New York 12095
Phone: [phone] Fax: [phone]
EMAIL: [email protected] WEB: http://www.electro-metrics.com
MANUAL REV. NO: ALP70-0995 ISSUE DATE: SEPTEMBER 01 1995

WARRANTY
This Model ALP-70 Loop Antenna is warranted for a period of 12
months (USA only) from date of shipment against defective
materials and workmanship. This warranty is limited to the repair
of or replacement of defective parts and is void if unauthorized
repair or modification is attempted. Repairs for damage due to
misuse or abnormal operating conditions will be performed at the
factory and will be billed at our commercial hourly rates. Our
estimate will be provided before the work is started.

ELECTRO-METRICS ALP-70
(ALP70-1)
DESCRIPTION AND USE ELECTRO-METRICS
ALP-70 LOOP ANTENNA
1.0 Description
The ALP-70 Loop Antenna is designed to obtain magnetic field measurements from 10
kHz to 30 MHz. The antenna is suited for use in compliance testing to MIL-STD-461A/B/C,
CISPR standards, plus other government and federal standards.
The antenna can be used with any 50

instrument being designed and calibrated for use
in a 50

system. The antenna incorporates a balanced faraday shield that reduces its response to
electric fields to a vanishingly small amount allowing it to obtain practically pure magnetic field
measurements.
The antenna is designed to work into a 50

system and the calibration chart is based on
this use. The calibration chart gives values of antenna factor for finding magnetic field strength
H.
To find the field strength H in dB(µA/m), add the factor in dB(S/m) to the measured two-
terminal input voltage on the 50

analyzer/receiver in dB(µV).
To find the flux density B in dB(pT), add 2 dB to the field strength H reading.
The ALP-70 Loop Antenna is, electrically, a magnetic dipole and thus having a dipole
pattern must be oriented for best sensitivity.
The base plate has a 5/8-11 threaded receptacle for mounting to the Model TRI-136
Tripod. This allows the loop antenna to be mounted either vertically or horizontally with respect
to a horizontal plane.

ELECTRO-METRICS ALP-70
(ALP70-2)
2.0 Specifications
2.1 Electrical
Frequency Range (calibrated): 10 kHz-30 MHz.
Refer to Figure 1 for the Antenna Factor Chart)
Impedance: Calibrated for use into 50

.
Signal Output Connector: BNC, female.
Signal Injection Connector: BNC, female.
2.2 Mechanical
Outside Diameter: 635 mm (25").
Height: 686 mm (27").
Weight: 0.5 kg (1.1 lbs).

ELECTRO-METRICS ALP-70
(ALP70-3)
FIGURE 1
ALP-70 ANTENNA FACTOR CHART
PAGE 3A