How much is an Agilent E7495B Portable Spectrum Analyzer worth ? - Page 1
Forum section: electronics / testgear

author: BravoV
author_rank: Super Contributor
timestamp: August 19, 2017, 05:54:49 pm
content: ... at least for you ?Unit only, passed self test, cosmetically is still excellent, out of warranty of course.And its came with these installed options.Any words regarding the installed options will be appreciated.

author: technogeeky
author_rank: Frequent Contributor
timestamp: August 19, 2017, 10:50:34 pm
content: Quote from: BravoV on August 19, 2017, 05:54:49 pmIt's worth somewhere in the $300 to $600 range. The E7495a can be had with only cosmetic defects for $300 (or just under). The B model isn't worlds better.All of the software-enabled options (all of the low numbered analyzer options) can be software-hacked for free, so they are essentially worth nothing.The bias tee is a slightly rare option, which is nice. #510 is standard usually (most units have it). #600 is standard (most units have it)It's actually kind of nice that your unit doesn't have the T1/E1 analyzers, because they are essentially worthless, cause the boot time to increase by almost 60 seconds, and can't easily be software disabled.So I'd say, again, $300-$600.

author: BravoV
author_rank: Super Contributor
timestamp: August 20, 2017, 09:34:20 am
content: technogeeky, thanks and appreciate the reply.Also wow, I didn't know all those options can be enabled thru hacking, yay.Now, more questions ... (if you don't mind) as you sound like very familiar with this particular product.- About the hack, is it easy ? Especially for a noob.- Can this unit powered from the AC/DC adapter "WITHOUT" any battery in it ?- You mentioned ceiling price is about $600, assuming its "B" but at what conditions, apart from cosmetically perfect ? The accessories completeness ? Which ones are crucial from the standard accessories list ?- Finally, is this a decent SA "+ CE Signal Generator" , say for this price range you mentioned ? Or there are other better alternatives at the same price range ?Again, many thanks.

author: technogeeky
author_rank: Frequent Contributor
timestamp: August 20, 2017, 10:05:49 am
content: Quote from: BravoV on August 20, 2017, 09:34:20 amQuoteQuoteYep. After making backups, you can just telnet into the device and replace a binary with another binary (instructions for making this with hex editor are on this forum, search 7495a). Then you can use the UI install the remaining options.QuoteYep. I haven't tested it myself, but it should work down to about 12V.QuoteI think $600 is with no accessories.Mine came with no accessories other than the bag and the (useless) TX/RX cables for the T1 analyzer. The seller also separately sold me the two short type N cables for $15 each.The other accessories, if they are included, are probably quite valuable. The two 10dB pads are probably worth at least $25 each. The 40dB 100W load is probably worth $100 or more. A GPS antenna is probably only worth $15.If you got an open/short/load calibration kit, that's probably worth as much (if not more) than the E7495B itself.I don't consider a power meter an accessory, but if you got one with yours, it's worth at least a hundred and as much as $1000.QuoteYes, it's an unbelievable deal. It's an almost-laboratory grade instrument that's built like a tank. Within the context of the limitations that the instrument presents (the signal generator only goes from ~ 375 MHz to 2.5GHz, the spectrum analyzer only goes down to 500kHz which rules out audio and some power supply EMI investigation), it's a very capable instrument.The signal generation lower bandwidth is probably the most significant restriction. It makes it harder to do things like sweep antenna (one port return loss) down in the HAM/CB ranges.Realistically, though, I don't think there's a better SA value out there assuming you are interested in the frequency ranges it covers.Quote

author: alm
author_rank: Super Contributor
timestamp: August 20, 2017, 10:45:58 am
content: Is size an issue? I imagine there might be some 19" bench units with much better performance. You might be able to find more information inthis thread. The E7495 units have some extra features that could be useful like mobility, CW generator and SWR, but might not be the best choice for a pure spectrum analyzers if RF performance is a concern, especially below 375 MHz.I assume you readpreviousthreadsabout this unit and watched Shariar's teardown / demo:Quote from: technogeeky on August 20, 2017, 10:05:49 amIn guaranteed working condition. Broken (untested power sensors are usually broken on eBay) they are almost worthless since a blown diode/thermistor equals beyond economical repair.

author: technogeeky
author_rank: Frequent Contributor
timestamp: August 20, 2017, 03:28:37 pm
content: Quote from: alm on August 20, 2017, 10:45:58 amAgreed.I'd love to hear what the OP paid and what accessories he got.

author: BravoV
author_rank: Super Contributor
timestamp: August 23, 2017, 08:08:03 am
content: Quote from: technogeeky on August 20, 2017, 10:05:49 amNoted, $600 without any accessories.Not the complete whole accessories though, the seller sent me this below as the "part of" the complete accessories which I think includes the power adaptor, battery and misc coax cables which are not pictured below.Quote from: technogeeky on August 20, 2017, 10:05:49 amAgain, noted, yeah, not for audio, its more for RF.

author: BravoV
author_rank: Super Contributor
timestamp: August 23, 2017, 08:12:53 am
content: Quote from: alm on August 20, 2017, 10:45:58 amHey alm, glad you pop in here.Actually its not the size, its just got an offer and considering it. There are not many bench SA offer around this location where I live.Quote from: alm on August 20, 2017, 10:45:58 amYes, I did for the Shariar's video, thanks for the link for hacking.Quote from: alm on August 20, 2017, 10:45:58 amLook at previous post with photo, is that the power sensor you talking bout ?How to determine its not broken ?

author: BravoV
author_rank: Super Contributor
timestamp: August 23, 2017, 08:15:23 am
content: Quote from: technogeeky on August 20, 2017, 03:28:37 pmSubject to bargaining, currently the offer is hovering a little less than 900 bucks, what do you think about this figure ?Its for my friend (a hobbyist) which has a rich bone, I'm just helping him to acquire this at optimal price. No way I can afford that.

author: kirill_ka
author_rank: Frequent Contributor
timestamp: August 23, 2017, 10:22:46 am
content: Quote from: BravoV on August 23, 2017, 08:12:53 amConnect it to power meter (or E7495) and check if it can be calibrated against internal power reference.But I don't see that sensor cable is included.

author: Neganur
author_rank: Unknown
timestamp: August 23, 2017, 01:31:08 pm
content: Sold mine for 500 € I think, I would not pay more for them either - they're not that special.Had all accessories (cal kit, power sensor, charger) but sold separately. The unit is also quite heavy (10kg) so take shipping cost into account when on the lookout for them.https://www.eevblog.com/forum/buysellwanted/fs-(eu)-agilent-e7495a-500khz-2-7ghz-base-station-test-set-(sasiggenswr)/msg1060740/#msg1060740

author: technogeeky
author_rank: Frequent Contributor
timestamp: August 24, 2017, 08:28:13 pm
content: Quote from: BravoV on August 23, 2017, 08:08:03 amLooking at that picture, I can state what I see and how much I guess it's worth:$100 - 100W 40dB attenuator$40 - 2x dual BNC to BNC cables$220 - 8482A power sensor (if working)$___ - 3x Type N to unknown (SMA? SMB? SMC? TMC?)adapters$___ - 5x Type N to 7/16 adapters: These can be handy, but not particularly for use with this instrument. I wonder why they are included, since they would normally be for theE1option which I think your unit did not have.: I can't tell what these are. If they are all Type N to SMA, then they are certainly useful. If they are any other connector, they are much less useful.: These are probably very nice, very well made, butuselessfor you or your friend. You will probably never encounter a 7/16th connector.Here's an image from some random ebay sale of a E7495B:So, here is what I don't see in your pictures (not necessarily a huge problem, but for the sake of completeness):Power AdapterOpen/Short/Load Calibration Kit (6 pcs)Power Sensor Cable2x short type N cablesThe strangest thing missing is the power sensor cable (which can cost at least $50 and as much as $150 depending on the length of the cable, though it could probably be hand made since it's all digital).It's not strange to not see the Open/Short/Load kit. These are very sought after and valuable.There is also a known problem with the E7495A/B screen gasket. Basically, the watertight seal around the plastic in front of the LCD heats up and due to the position of the gasket between the metal front cover and the plastic screen, it slides around until it covers part of the screen. This can pretty easily be fixed for about $10, and instructions are available in the other thread and I can help further if necessary. Since I haven't actually seen the unit in question, I don't know if it has the problem.Overall, I'd say this:IFthe power sensor cable is included andIFthe power sensor is guaranteed to work (when connected to the power reference of that (or any) unit, it should read 0.0dBm and 50 MHz) , then at $900 it's not a bad deal. It's not a great deal either, though.IFthe cal kit is also included, it's agreatdeal.If it were my money, I would use the $900 on something more capable. For instance, I would love to have a tracking generator that goes below 375 MHz (down to 9kHz would be wonderful). I would love to be able to do demodulation of arbitrary signals (FM and AM demod, at the very least). It would be awesome to cover the 5GHz wifi bands also (though this is both a bit much to ask for this price point, and the wrong tool for the job: to really look at wifi and such things, you usually want a realtime spectrum analyzer).So unfortunately my final verdict is a resoundingmeh. At that price point, I would seriously consider what other options are available.

author: usagi
author_rank: Frequent Contributor
timestamp: August 29, 2017, 12:02:53 am
content: the signal generator on these is pretty featureless as well.if you don't need portability, i'd go with a used R&S cmu200 over an e7495.keep in mind these were built for telco guys working cell sites. not lab guys. the feature set and performance reflects that.most of these used e7495 come with a huge agilent backpack which is pretty cool.

author: Neganur
author_rank: Unknown
timestamp: August 29, 2017, 09:35:22 am
content: That's the one item I did not sellit's way too cool and actually a high quality bag like the trekking ones.