Anritsu ML2400 Series Power Meters
2 models with full specifications from Anritsu.
The Anritsu ML2400 series, which includes the ML2437A and ML2438A, provides high-speed, accurate RF and microwave power measurements. Designed for benchtop and field testing, these instruments combine the measurement accuracy of thermal sensors with the speed of diode sensors. Both models feature a graphical display for peak power visualization and deliver a sampling rate exceeding 35,000 readings per second.
- Sampling Rate
- Over 35,000 readings/s
- Dynamic Range
- Up to 90 dB (sensor dependent)
- Reference Calibrator
- 50 MHz, 0.0 dBm (1.0 mW)
- Power Requirements
- 85 to 264 VAC, 47 to 440 Hz, 40 VA max
Models in this series
Single and Dual Channel Variations
The main distinction within this series is the number of inputs available for measurement. The Anritsu ML2437A is a single-channel instrument designed for basic power monitoring and testing. The Anritsu ML2438A is a dual-input variant, enabling simultaneous measurement of two separate points. The dual-channel system is ideal for determining gain, attenuation, or matching characteristics in transmission lines.
Compatible Sensors and Performance Profiles
Both the ML2437A and ML2438A support Anritsu's MA2400A/B Series, MA Series, and MP Series sensors. Depending on the selected sensor model, the system can measure frequencies from 100 kHz up to 65 GHz.
Dynamic ranges and capabilities vary by sensor class:
- MA2420A/B Thermal Sensors: 50 dB dynamic range for high-accuracy average measurements.
- MA2440A High Accuracy Sensors: 87 dB CW and >57 dB Peak dynamic range.
- MA2460A/B Fast Diode Sensors: 80 dB dynamic range optimized for rapid speed.
- MA2470A Power Sensors: 90 dB CW and >60 dB Peak dynamic range.
- MA2480A Universal Sensors: 80 dB dynamic range.
For power levels that exceed the native ratings of these sensors, external couplers or attenuators are required.
System Integration and Interfaces
The rear panel of these meters includes several essential BNC interfaces for automated testing environments. A scaled analog output provides measurements in analog form, while an external trigger input offers TTL-compatible synchronization. A V/GHz input is also available to support automated frequency correction.
An integrated 50 MHz calibrator with a Type N female connector on the front panel delivers a 0.0 dBm (1.0 mW) reference signal. The internal reference oscillator maintains an accuracy of ±1.2% per year. For field applications, the meters can be fitted with an optional high-capacity NiMH battery.
Frequently asked questions
- What is the primary difference between the ML2437A and ML2438A?
- The ML2437A is a single-input power meter, while the ML2438A is a dual-input power meter that allows for simultaneous two-channel measurements.
- What sensor families are supported by the ML2400 series meters?
- They support the MA2400A/B Series, MA Series, and MP Series power sensors.
- Can these power meters run on battery power?
- Yes, both models support an optional high-capacity NiMH battery for portable use.