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Werlatone’s digital in-line power meters combine the company’s heritage in directional couplers with an RMS power meter, integrated in a compact package for cost-effective monitoring of forward and reverse power. The three models in the family cover 2 to 32 MHz, 20 to 200 MHz and 80 to 1000 MHz,  eliminating the need for dedicated and costly test equipment to monitor high-power transmitters.

Welatone’s digital power measurement and interface enables instantaneous and simultaneous local and remote monitoring. Alarms for VSWR and temperature extremes can be set by the user, triggering notifications and relays when exceeded. Two temperature sensors are provided, one within the power meter, the second an external sensor placed by the user. Multiple in-line power meters can be networked and monitored via the TCP/IP SNMP, RS232 or RS485 interfaces and using the digital dashboard spreadsheet and Windows graphical interface software. An Android app is available to monitor and remotely control system operation.

The WPM11199 model measures up to 10 kW CW from 2 to 32 MHz and is integrated with a 6 in. line section and 1 5/8 in. EIA connectors. The WPM10800 measures up to 10 kW from 20 to 200 MHz and is packaged in a 6 in. x 3 in. x 2.24 in. housing with LC high voltage connectors. The WPM11235 measures up to 1 kW and is packaged in a 3 in. x 3 in. x 1.59 in. housing with 7/16 connectors. The power meter has 40 dB dynamic range and will indicate the forward power in either W or dBm and reverse power in W. The reflected power measurement can be provided as W, return loss or reflection coefficient. After the initial calibration by Werlatone, which is traceable to the National Institute of Standards and Technology (NIST), subsequent calibration is not required.

The in-line power meters can be powered with an AC power adapter, power over Ethernet (PoE) or through the RS485 serial interface. An optional rack-mounted, 8-channel monitor with graphical interface is available.

Patterson, N.Y.