Choosing between signal spectrum analyzers can feel confusing when the two options are priced so differently. The Aeroflex IFR Marconi 2390 / AN930A is a 22 GHz RF/microwave analyzer with a tracking generator, listed as a parts unit; the BSR EQ-3000 is a used stereo frequency equalizer with a spectrum display in a black metal rack-mount chassis. About $240 separates their listed prices, so the real question is whether you need to analyze RF signals or shape audio frequencies.
Quick verdict
If you are repairing or measuring RF/microwave signals and can handle an EEPROM configuration repair, the Aeroflex IFR Marconi 2390 / AN930A is the one that covers 22 GHz. If you want a rack-mount audio equalizer that also gives you a visual spectrum readout, the BSR EQ-3000 is the practical choice at a far lower listed price.
At a glance
| Aeroflex IFR Marconi 2390 / AN930A | BSR EQ-3000 | |
|---|---|---|
| Listed price | $299.95 | $59.99 |
| Condition | For parts or not working | Used |
| Measurement focus | 22 GHz spectrum analyzer with tracking generator | Stereo frequency equalizer / spectrum analyzer |
| Chassis and styling | Physically complete unit | Black metal rack-mount chassis |
Where each product wins
The Aeroflex wins for RF work. Its 22 GHz range and tracking generator make it a serious bench instrument for signal analysis, and the listing says it powers up and boots with a good display, power supply, and controller. The BSR wins for audio work. It pairs a stereo equalizer with a spectrum analyzer, so you can adjust frequency response and see what is happening at the same time.
Product notes
Aeroflex IFR Marconi 2390 / AN930A
Choose this one if you need a 22 GHz spectrum analyzer and have the skills to finish it. The unit is physically complete and boots to a good display, but the configuration EEPROM was not matched to the replacement controller, so testing fails and it is sold for parts only. That makes the Aeroflex a repair project for someone who works on RF/microwave equipment. The tracking generator factory option is part of the package, but you should expect to sort out the controller configuration before trusting any measurement. This is not a ready-to-test instrument out of the box. It is for a buyer who knows what a 2390 / AN930A is worth and can bring it back to life.
BSR EQ-3000
The BSR EQ-3000 serves the audio side of the spectrum analyzer world. It is a used black metal rack-mount unit that combines a stereo frequency equalizer with a spectrum analyzer, so it fits in a sound system or studio rack while giving you a visual readout of the frequency content as you make adjustments. The listing says the pictured item is the exact one you receive, and it also notes that anything not visible in the pictures is not included, so the photos define what is in the box. It is not an RF/microwave analyzer, so it will not help with 22 GHz signals. For music, home theater, or live sound work, though, it pairs equalizer and spectrum display functions in one rack-mount box.
Final choice by use case
For RF/microwave signal analysis and repair work, the Aeroflex IFR Marconi 2390 / AN930A is the meaningful choice if you can repair the EEPROM issue. For audio system equalization and visual signal monitoring, the BSR EQ-3000 is the practical pick, especially if you want a rack-mount unit without taking on a repair project. Match the tool to the signal, and the right pick becomes obvious.
