FREE: Microwave Radio Test Set ME645A by Anritsu Electric Co. Japan - Page 1
Forum section: electronics / general

author: bluetrepidation
author_rank: Newbie
timestamp: January 02, 2023, 08:12:24 pm
content: Hello,Three carry bags with all the items and manuals. I no longer have room for this kit. It did power on and passes a self test last I messed with it. FREE! Pickup near Youngstown, Ohio USA. Call or text: three three zero - four three nine - seven eight five two.https://photos.app.goo.gl/7PzTYhZCzTxewSDi7https://photos.app.goo.gl/6tvfkwEjSRz9vjam9https://photos.app.goo.gl/W7gEfFbwmmtX51Ab6Thanks,A.J.

author: LaserSteve
author_rank: Super Contributor
timestamp: January 07, 2023, 07:29:38 pm
content: Would love to have it. I'm less than an hour away.I need a power meter at 10 Ghz for ham radioDoes it have the power meter probes?Steve

author: bluetrepidation
author_rank: Newbie
timestamp: January 08, 2023, 01:59:35 am
content: SOLD thanks Steve. Let me know how it works.A.J.

author: Stray Electron
author_rank: Super Contributor
timestamp: January 08, 2023, 02:17:00 am
content: Steve,How useful are these? There's one sitting in a surplus store near here. Can you show a picture of the probes? I don't think there are any with this one but if I know what to look for ....

author: LaserSteve
author_rank: Super Contributor
timestamp: January 08, 2023, 06:20:17 am
content: ME645A is poorly documented online because the main customer was AT&T Longlines.Everything you'd expect to have to test or calibrate a microwave repeater at the base of a 325 foot tower on a snowy mountain is here.The system looks at both IF and RF signals.IF and RF power heads are -30 dBm to +10dBm, 4 digit readout in dBm and Analog peaking meter.75 Ohm power detector is 10 to 300 Mhz.50 Ohm head is 100 Mhz to 11.7 Ghz.Both are diode detectors with temperature and non-linear correction.If sweep width, +/- 1,5,15 or 32 Mhz centered on 70.O or 71.4 Mhz.switch selectable.RF generator and Spectrum Analyser2.10 to 2.18 Ghz [option 7]3.65 to 4.25 Ghz5.8 to 6.5 Ghz10.6 to 11.7 Ghz [option 001]Cw, and +/_ 2,10,15 and 20 Mhz sweeps.0dm to +10 Dbm outputs.I'll scan in the manual in the morning.Vector CRT has a P7 phosphor and X,Y, blanking inputs for user functions.Frequently counter is 14-135 Mhz low range,14 to 300 Mhz high range with 3 gate times and variable sample rate. Option  gets you RF input counting over all the installed ranges. Do not expect it to count outside of the installed ranges as it uses subharmonic mixing for the extended range option. [ Well, don't unless you inject another reference carrier center frequency within the range of the internal YIG oscillators :-) ]You need a minimum of four probes, possibly five to get all the functions. IF leveling probe, RF leveling probe, iF power proble and RF power probes, and there should also be a Wiltron SWR Autotester in the kit.This came with a 40 pound bag of probes, adapters, waveguide adapters,,attenuators, filters, samplers and cables.If your missing 5 key cables your pretty much screwed.NeededRf probe cable and RF probe/detectorRf leveling cable and directional samplerIf leveling cable and IF samplerDc power cable to connect the two units.Rf feed cable between the two units.If power probe/detectorThe accessory kit is amazing.You can look at power, frequency, sweep, s12, s21, s22, IF, measure gain and return loss, transmit a test signal to the next site in the chain, check the waveguide and the front end, and a variety of IF parameters. Measure bandwidth , noise,, etc.Clearly was set up for TD2, ARA6 , TL, and TH radios at AT&T sites.I'll scan in parts list and ops manual for you. Watch this thread.YiG based oscillators locked to a 1 Ghz PLL/VCo.10 Mhz ovenized references  with in and out.I need to test it tomorrow to see if the detector half works without the source half for RF power measurement.I know there is no horizontal sweep or spectrum analysis without the source half. I also know the subharmonic mixer needs the source half for full range counting, the 14-300 Mhz counter is stand aloneDid I mention the built digital voltmeter to 999 volts?Display Sweep rate is 47 Hz, fixed. There are extensive marker generators but No cursors.AGAIN, WILL SCAN MANUAL AND POST BY Evening EST.Service manual is huge and literally contains drawings that fold like Origami.THANK YOU A.J.Steve

author: LaserSteve
author_rank: Super Contributor
timestamp: January 08, 2023, 08:12:05 pm
content: Pictures shamelessly snagged from Ebay and Pic-ClickThe combined set of parts in the picture is pretty much the basic setup you need.IF leveler head can be faked with about 20$ worth of discrete parts and a Minicircuits directional coupler (20$)Detector heads and couplers are all matched to unit and serial numbered at factory. Book says sensors are reasonably matched and can be substituted / calibrated.Steve

author: LaserSteve
author_rank: Super Contributor
timestamp: January 10, 2023, 10:21:34 pm
content: Very shortened low res scan of part of ops manual. cut way down to fit on EEV attachment limit...Real scan @ 200 dpi would be 11 Megs... and 4x the pages.The service manual would be around 33 Meg or more..Steve

author: Momchilo
author_rank: Regular Contributor
timestamp: January 12, 2023, 02:48:13 pm
content: The best places to upload the full manuals are:http://www.ko4bb.com/getsimple/index.php?id=manualshttp://bama.edebris.com/manuals/These websites already have a lot of manuals, firmwares etc. of different test instruments and they are well known in this and other forums. Each new manual is welcome.