XT-239-AT Portable Spectrum Analyzer Signal Measuring Instrument 2.3~2.9GHz Condition: Item Type: Spectrum Analyzer Material: ABS+Metal Color: As shown in the picture Weight: Approx.515g/18.2oz Index Parameter range Model XT-239-AT S11 ( typical value) -31dBm Frequency range(MHz) 2.3~2.9GHz In-band unevenness 0.5dB(after calibration) RBW(kHz) 20, 30, 50, 100, 200 and 300kH(minimum) DANL(average bottom noise) -110dBm（typical value） Amplitude precision +-0.5dBm Scanning time 200ms MAXHOLD function Support Reference level adjustable Support Display refresh frequency 5Hz(refresh 5 screens per second) LCD resolution TFT 800×480 LCD size 5in Radio frequency interface SMA-K Chromatogram Support AT function Support Thermodynamic diagram Support Built-in RTC clock Support Battery capacity 3300mAh（typical） Battery type 18650 lithium battery Charging time 4～5 hour Charging interface Micro USB interface Battery life 9 hour Size 135x101x30mm / 5.3x4.0x1.2in(excluding knob and antenna height) Operating temperature -20～45℃ Storage temperature -20～70℃ Signal range -100 ~ -10dBm (large signal and attenuator enter)