Precision RF Power Probe

is a very high performance monitor of the RF level. It can be compared to top class laboratory instruments, but in a very small package at very competitive cost. Very high measurement precision and very wide dynamic range make this probe the best choice for transmission systems measurements both at the transmission and at the reception end. ANT131 is designed for precision measurement of analog as well as digitally modulated signals. The dynamic range is more than 50dB (±1db) and it’s bandwidth is extremely high: using the fixed pads (3dB or 20dB) its measurement range can be shifted, so that both high power and low power can be correctly detected.
Furthermore the measurement range can be compressed, in order to have a better reading; this is very useful when used at the reception end. ANT131 probe is manufactured in two frequency ranges: 10MHz to 1GHz, 500MHz to 2.5GHz. Instant power can be read directly from the 7 segment displays on the front panel, and the unit can be programmed using a front panel pushbutton, and browsing into
it’s menus. High precision reading is obtained using a 10bit A/D converter.
The probe can be used as a stand alone alarm device thanks to an on board alarm feature that can be programmed via the front panel pushbutton: an open collector contact closure will trigger at a settable alarm point, and will reopen at a programmed threshold.

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Power requirement

  • 12VDC @ 160mA max

I/O Range

  • Power Range -50 ÷ +33 dBm (2W max) ± 0.5dB
  • Input type digital or analog signals (crest factor correction)
  • Frequency Range ANT 131-L from 10 MHz to 1 GHz
  • ANT 131-H from 500 MHz to 2.5 GHz
  • Pads 0db, 3dB or 20dB selectable

I/O Connectors

  • RF input BNC for ANT131 w/ low frequency range (ANT131-L)
  • SMA for ANT131 w/ high frequency range (ANT131-H)
  • Output 9-Pole Male for real-time RS485 readings, alarm and
  • 0-5v linear output


  • Length 107mm 4.21”
  • Width 50mm 1.96”
  • Height 26mm 1.02”
  • Weight 149gr


  • Protocol ANTLAN® protocol or RPTC protocol
  • Option SNMP
  • Alarm Local open collector closure, level and threshold software
  • Programmable via menu on the probe
  • Display 7 segment digits on the probe (to read Power, program the probe, …)
  • Readings dBm, W or kW, software selectable
Functionality can be achieved with a minimum effort: this is the secret of modern technology.
And this is also the result of uninterrupted development, where research and design push the competitive edge of technology.
ANT's remote control system is the result of this philosophy: "Garda System" embeds in a single product state-of-the-art technology, advanced features and easy of use”

Diego Maioli

ANT Group Srl

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