Uploaded August 2026 | Updated September 2026, 2 weeks ago

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Teardown and detailed analysis of the Harogic PXN-90 9GHz Spectrum Analyser.
harogic.com/product/harogic-px-series-standard-spectrum-analyzer-receiver

Forum: eevblog.com/forum/blog/eevblog-1767-harogic-pxn-90-9ghz-spectrum-analyser-teardown

00:00 - Harogic PXN-90 9GHz Portable Spectrum Analyser
01:37 - Raspberry Pi OS
02:27 - Teardown
03:29 - Battery compartment
05:11 - Taking the screen off
06:20 - Internals
07:41 - Thermal Design
08:37 - Rigid Coax
10:05 - Warranty Void If Removed
11:05 - The RF Block
13:35 - That wasn't me!
13:55 - Ok, this was me. FAIL!
15:02 - Soldering REPAIR
16:33 - Winner Winner Chicken Dinner
17:44 - Detailed reverse engineering of the front end
30:09 - Detailed look at the Mixer board and pre-select filters
34:43 - Signal flow
35:54 - The ADC and OCXO Local Oscillator board
38:36 - The RF processor board
39:13 - Mad Man Muntz


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