Wattmeter™ Series 2017-12-13T01:20:13+00:00

Wattmeter™ Series

Sonic Concepts develops electronics to support transducer control and hydrophone communication systems. From an underwater telemetry system used to track salmon, to a doctor friendly image-guided HIFU control system for non-invasive treatment, Sonic Concepts has the in-house expertise in providing state-of-the-art electronic design and manufacturing.

Wattmeter™ Series

Sonic Concepts develops a series of Wattmeters™ used as a calibration instrument to accurately monitor net electrical power from an RF amplifier into a source transducer.

Features:
– Hand held and compact
– Average and peak envelope power
– 20 – 200 Watts or 200 – 2,000 Watts power range
– 100 kHz to 10 MHz frequency range
– Includes calibration traceable through NIST

Wattmeter Datasheet

Description

The Watt Meter will operate over a 100 kHz to 10 MHz frequency range and up to 2,000 Watts full scale.  Each Watt meter is enclosed in a small plastic enclosure with RF input and output connectors, a DC power connector, and two output connectors for the average and peak power signals.  One output signal provides a calibrated DC voltage proportional to the average power level.  The other signal provides a calibrated voltage that follows the envelope and represents the peak envelope power.

Watt Meter Selection Table

Model Display Save as
Log File
Power Scale
( Watts )
Resolution
( Watts )
Calibration Point
( Watts )
21A 4.5 digit LCD 0-200 0.025 10
22A 4.5 digit LCD 0-2,000 0.25 100
23A Desktop GUI via USB 0-200 0.025 10
24A Desktop GUI via USB 0-2,000 0.25 100

Universal Technical Specifications

Output data

Average power and peak envelope power

Sample rate

10 Samples/second (up to 48K Samples/second with custom software)

Signal scaling

0.001 Volt per Watt (0.200 V at 200 W) on 200 W range 0.0001 V/Watt (0.200 V at 2000 W) on 2000 W range

Frequency range

100 kHz to 10 MHz (min.)

Loss thru meter

<0.5%

Filter corner frequency

Switch-selectable, 3.2, 10.6 or 32.7 kHz, for peak envelope power output

Calibration point

100 Watts into 50 Ohms at 850 kHz, on 2000 W range

RF connectors

BNC female in and out

Load impedance

50 Ohms (nom.), 10 – 250 Ohms OK

Power supply

Desktop-style modular AC adapter, 100-240 VAC 50-60 Hz input, 6VDC output (Supplied with meter)

Optional Detailed Calibration

Optional Watt meter calibration is performed using an absorbing-type RF Wattmeter as a reference standard. An included test report will include plots of the Watt Meter’s frequency response and linearity.

Output data

Agilent/HP EPM-441A RF Power Meter
Agilent/HP 8482H RF Power Sensor, calibrated 0.1 MHz – 4.2 GHz, 3.5 Watts maximum input power
Bird model 8322 RF attenuator 200 Watts continuous, 30 dB, 50 Ohms

Calibration Test Points
*All performed at 0.5, 1,0 and 1.5 MHz

Model Test Power Level
High Resolution
( Watts )
Test Power Level
High Power
( Watts )
21A 2.5, 5.0, 10.0, 15.0 20, 50, 100, 150
22A 25, 50, 75, 100, 150 50, 100, 150, 250
23A 2.5, 5.0, 10.0, 15.0 20, 50, 100, 150
24A 25, 50, 75, 100, 150 50, 100, 150, 250

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