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ADRV9004 RSSI variation over LO frequency

Thread Summary

The user is experiencing significant RSSI variation vs LO frequency on the ADRV9004 evaluation board (30 MHz to 3 GHz version) with fixed input power (-40 dBm) and hardware gain (34 dB). The issue persists across multiple boards and ports, and similar results were observed using both IIO Oscope v0.18 and TES. The user requests measured data from Analog Devices to help diagnose the problem.
AI Generated Content
Category: Hardware
Product Number: ADRV9004

Hi, I am seeing significant RSSI variation vs LO frequency in ADRV9004 evaluation board (30MHz to 3GHz version). I am keeping the input power fixed at -40dBm at the RF connector and hardware gain fixed at 34. I am using IIO Oscope v0.18. Can you help me understand why I am seeing such wide RSSI variation over frequency? Thank you so much.

Hardware Gain (dB) MXG CW Input Power (dBm) MXG Freq (MHz) RX1 LO Freq (MHz) RX1 RSSI (dB)
34 -40 31 30 79.2
34 -40 51 50 78.5
34 -40 101 100 72.8
34 -40 151 150 66.26
34 -40 201 200 61.63
34 -40 251 250 56.79
34 -40 301 300 53.82
34 -40 351 350 51.57
34 -40 401 400 49.26
34 -40 451 450 46.86
34 -40 501 500 46.58
34 -40 551 550 45.22
34 -40 601 600 43.44
34 -40 651 650 42.21
34 -40 701 700 41.68
34 -40 751 750 40.8
34 -40 801 800 39.83
34 -40 851 850 39.25
34 -40 901 900 38.99
34 -40 951 950 38.39
34 -40 1001 1000 37.93
34 -40 1051 1050 37.88
34 -40 1101 1100 37.53
34 -40 1151 1150 37.26
34 -40 1201 1200 37.28
34 -40 1251 1250 37.21
34 -40 1301 1300 36.95
34 -40 1351 1350 37.15
34 -40 1401 1400 37.17
34 -40 1451 1450 36.95
34 -40 1501 1500 36.94
34 -40 1551 1550 37.9
34 -40 1601 1600 36.89
34 -40 1651 1650 36.42
34 -40 1701 1700 36.59
34 -40 1751 1750 36.3
34 -40 1801 1800 35.47
34 -40 1851 1850 35.32
34 -40 1901 1900 35.2
34 -40 1951 1950 34.32
34 -40 2001 2000 33.78
34 -40 2051 2050 33.47
34 -40 2101 2100 33.2
34 -40 2151 2150 32.62
34 -40 2201 2200 32.25
34 -40 2251 2250 32.13
34 -40 2301 2300 31.9
34 -40 2351 2350 31.53
34 -40 2401 2400 31.5
34 -40 2451 2450 31.49
34 -40 2501 2500 31.26

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