# XBP9B-DPST-021 RADIO RANGE

**URL:** <https://forums.digi.com/t/xbp9b-dpst-021-radio-range/15053>\
**Category:** XBee - 802.15.4\
**Tags:** xbeeproo900hp, transmit-power, radio-range\
**Created:** [July 1, 2015, 8:16am UTC](https://forums.digi.com/t/xbp9b-dpst-021-radio-range/15053 "2015-07-01T08:16:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![KJM](https://avatars.discourse-cdn.com/v4/letter/k/d26b3c/32.png) [@KJM](https://forums.digi.com/u/KJM)\
**Post date:** [July 1, 2015, 8:16am UTC](https://forums.digi.com/t/xbp9b-dpst-021-radio-range/15053/1 "2015-07-01T08:16:09Z")

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Can’t get more than 15km bwteen range between XBP9B-DPST-021 modules with 10dbi antennas each end. Checked the config that they are on max pwr (0.25w or 24dBm). When we put a spectrum analyser at 5m range from a module with a 0dBm antenna we read -70dBm. According to the Friss equn this corresponds to a module transmit power of -24dBm not +24dbm. The module averages about 125mA which seems more like a PL2 power level, low for a 250mW RF output? Does the module report RF power level during transmit that we could read somehow?

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [July 1, 2015, 10:00am UTC](https://forums.digi.com/t/xbp9b-dpst-021-radio-range/15053/2 "2015-07-01T10:00:36Z")

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No it does not report the TX power level but it does report the RSSI level including interference.