|
Re: APC-7 adaptor to N
开云体育Hi Fred? ? Thank you for your input? I have seen 2 pictures of Chinese APC7 One that I recommended looks ok? the other one I have seen the fingers on the canter connection do not appear flat and that is the reason I talked about connection cycles ? I typical have to bin / trash 20 % of any of the cheap connecters I buy from china ? please do not shout they are manly for IF’s and frequencies below 500 MHz ? Recently had an N to F type adapter?? but the thread on the F type didn’t fit ?has any one seen this before ? Regards Paul ? From: [email protected] [mailto:[email protected]] On Behalf Of 73_Fred ? .. the world is bad... |
|
Re: APC-7 adaptor to N
Hello, Paul thank you for the information is useful for me confirm wrath I reading on the manual give me better understanding specially at my age
 I don't go to mesure more of 6Ghz. For the use of the power meter the maximum i got is 13dBm of my signal generator but I go to work to test diode detectors below -20dBm. I got one good serie of Wersheill.corp USA attenuator model 2 I think the go to 18Ghz, reading specs is important to avoid burning instruments.I go to buy the HP8481 when I fund one according my possibility, my is one hobby I'm not one METROLOGIST, sorry for the meteorologist the spell-ceker change the words.
Receive my best regards.
Francesco.
?
Proud to be one radio ham on the old fashion home made equipment and QRP lower.
G7OYO ?
?
Sent:?Tuesday, June 15, 2021 at 1:33 PM
From:?"Paul Bicknell" <paul@...> To:[email protected] Subject:?Re: [HP-Agilent-Keysight-equipment] APC-7 adaptor to N Hello Francesco just a few bits of information ? The 8484A DIODE POWER SENSOR Requires a 30 DB attenuator for calibrating when using the 50 Mhz reference ? The attenuator that is meant for this job is calibrated at 50 Mhz? part number is 11708A ? Please note the above attenuator should not be used for measurements ? Alternatively use any 30 DB attenuator and ignore the error due to the 50 mhz reference as you will probably not notice it ? ? Assuming you are not doing a lot of connection and disconnections ?to the APC connector? there is a Chinese APC connector that could do the job unfortunately it is a N female and you should use a N Mail Ebay? RF Coaxial APC7 - N Female Connector Adapter Calibrator Network Analyzer ??19.59 ? Best advice is to get a HP 8481 as this is a better range for most work? being – 30 ?to? + 20 dBm And keep the 8484 for any low power work – 70 ?to ?– 20 ?dBm? this is dependent on available money ? Regards Paul ? From: [email protected] [mailto:[email protected]] On Behalf Of Francesco ? Hello, I hope not caused some problem for my request of help on the "METEOROLOGIST" community I never used one APC-7 connector and the lack of it I think is not big sin. I thanks all the people to tray to help me for my ignorance on the matter, the pompous company how sell me the sensor advertise it on this word: Agilent Technologies 8484A DIODE POWER SENSOR8484A-003 Delete Referance attenuator ? On the end not 8484A-003 Delete Referance attenuator, 8484A-001 APC7 connector. ? I buy one other from other source I hope to fund one honest seller, on my 76 years old I believe on this world there is bad and good. Some word abut "METRO-LOGY" even tray to calls science for the component of maths and physics, on reality is based on philosophy not have an absolute value alway is % +/-. Thank you for the help. Francesco. ? ? ? ? |
|
Re: APC-7 adaptor to N
开云体育Hello Francesco just a few bits of information ? The 8484A DIODE POWER SENSOR Requires a 30 DB attenuator for calibrating when using the 50 Mhz reference ? The attenuator that is meant for this job is calibrated at 50 Mhz? part number is 11708A ? Please note the above attenuator should not be used for measurements ? Alternatively use any 30 DB attenuator and ignore the error due to the 50 mhz reference as you will probably not notice it ? ? Assuming you are not doing a lot of connection and disconnections ?to the APC connector? there is a Chinese APC connector that could do the job unfortunately it is a N female and you should use a N Mail Ebay? RF Coaxial APC7 - N Female Connector Adapter Calibrator Network Analyzer ??19.59 ? Best advice is to get a HP 8481 as this is a better range for most work? being – 30 ?to? + 20 dBm And keep the 8484 for any low power work – 70 ?to ?– 20 ?dBm? this is dependent on available money ? Regards Paul ? From: [email protected] [mailto:[email protected]] On Behalf Of Francesco
Sent: 15 June 2021 09:30 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] APC-7 adaptor to N ? Hello, I hope not caused some problem for my request of help on the "METEOROLOGIST" community I never used one APC-7 connector and the lack of it I think is not big sin. I thanks all the people to tray to help me for my ignorance on the matter, the pompous company how sell me the sensor advertise it on this word: Agilent Technologies 8484A DIODE POWER SENSOR8484A-003 Delete Referance attenuator ? On the end not 8484A-003 Delete Referance attenuator, 8484A-001 APC7 connector. ? I buy one other from other source I hope to fund one honest seller, on my 76 years old I believe on this world there is bad and good. Some word abut "METRO-LOGY" even tray to calls science for the component of maths and physics, on reality is based on philosophy not have an absolute value alway is % +/-. Thank you for the help. Francesco. ? ? ? |
|
Re: 8657J combo info
Good news!
I found the faulty component. The EMI filter explodes and covers the sorroundings with black sticky slime, smelling horrible. So I must get another EMI unit and swap it. This is so absurd :D I though in open the can and try to swap the cap damaged... but too pestilent R. |
|
Re: APC-7 adaptor to N
开云体育OK Roy ? We are straying from the original subject line hear? but a bit of my personnel information for you We have connecters and we have metrology connectors in a good lab each connector will have a record detailing the number of connection cycles and depending on the lab structure at a certain life this will be downgraded to not metrology standard and used for less demanding work alternatively put on Ebay or sent to? File 13/ bin / trash ? The term "fresh out of college" has been used? and that is a problem as I have had to teach several electronic graduates how to do basic soldering? ( not surface mount? ) ? A typical manager at BT thought any one could do an engineer’s job so a new person blow up 8 power heads before he was told his mistake and moved out of the department ? I am part of a society that supports a major player in the communications industry and it has supplied work experience / post graduate training to over ?200 students in a space of 4 years this has even included visits to schools with a focus on girls schools to get more girls into engineering ? During March this year 25 days my sylph and an old school friend? moved a historical society a library and set up a new lab for hands on teaching of mature students and work experience ?pictures in the pictures file of this site but does not include pictures off the 10 off 19 inch racks / bays that we acquired and filled with moved equipment ? hopefully this will establish the sort of work others and my sylph are doing other than our main job to encourage the next generation and also others to pass on their expertise in the electronics field ? sorry for the long mail but it appears that others do not realise the education elements that members are involved in ? Regards Paul ? From: [email protected] [mailto:[email protected]] On Behalf Of Roy Thistle ? On Mon, Jun 14, 2021 at 07:13 PM, Dave McGuire wrote:
Yes. And those guys, just out, and just fresh... and who were blowing power sensors, and futzing up metrology connectors, in the graduate lab... they were very soon fresh out of lab privileges... very soon in their college careers. Those are the guys selling power sensors, not using them. Or... maybe they buy power sensors on Ebay, and blow them up at home. Don't know. |
|
Re: APC-7 adaptor to N
开云体育Hi Roy ? Just a few notes on your posting Firstly most on hear have an amateur radio licence but we are on other professional? sites so do not display our call sign The personnel and standards on this site rang from the original designers those from the production line and calibration So ?we require ?professional equipment to do professional equipment repair and calibration ?and we on this site do not as you put it futz around with ? The bird? is only a tool for output power at a limited rang depending on the element? and suffers from the following compared to a HP 435? system ?or such like low dynamic rang compared to 50 dB low frequency response compared to 100 mhz to 18 Ghz ( as a standard low cost head also with heads to 100 Ghz ) low accuracy dues not go down to – 70 dBm ? regards Paul ? From: [email protected] [mailto:[email protected]] On Behalf Of Roy Thistle ? On Mon, Jun 14, 2021 at 10:09 AM, Francesco wrote:
Hi Francesco: |
|
Re: APC-7 adaptor to N
Hello, I hope not caused some problem for my request of help on the "METEOROLOGIST" community I never used one APC-7 connector and the lack of it I think is not big sin.
I thanks all the people to tray to help me for my ignorance on the matter, the pompous company how sell me the sensor advertise it on this word:
Agilent Technologies 8484A DIODE POWER SENSOR8484A-003 Delete Referance attenuator
8484A-001 APC7 connector 8484A Power Sensor. ?
On the end not 8484A-003 Delete Referance attenuator, 8484A-001 APC7 connector.
?
I buy one other from other source I hope to fund one honest seller, on my 76 years old I believe on this world there is bad and good.
Some word abut "METRO-LOGY" even tray to calls science for the component of maths and physics, on reality is based on philosophy not have an absolute value alway is % +/-.
Thank you for the help.
Francesco.
? ?
?
|
|
Re: 4395A software
On Fri, 11 Jun 2021, ROMDUMP wrote:
I have been looking for it myself for some time.EEPROM is just 8 kBytes. First 256 bytes contain serial number in pure ASCII starting at address zero. Then it is padded with FFs to 62 bytes. Then there is an interesting part, almost certainly installed options. Each option is marked with 2 very interesting :) bytes, 43 96. Installed options are marked with those bytes, not installed have zeroes instead. I have TWO 4395As here, one with options 001/1D6/010, the other one doesn't have 001. That allows for finding out how Opt.001 is marked in EEPROM. Here is 16 bytes starting at address 0x40 for the one WITHOUT Opt.001: 00000040 00 00 43 96 │ 00 00 00 00 │ 43 96 00 00 │ 00 00 00 00 This one is for the unit WITH Opt.001: 00000040 00 00 43 96 │ 00 00 00 00 │ 43 96 43 96 │ 00 00 00 00 It is quite obvious how the installed options are marked. I bet a 4395A without 001/1D6/010 will have those 16 bytes as all zeroes. Dunno which one is 1D6 and which is 010 but it should be possible to find out using several EEPROM dumps from several 4395As with different sets of options. BTW, Opt.1D5 is NOT an option at all in 8751A/4395A/4396A and probabbly many more. It is not shown in the list of installed options, not marked in EEPROM and it is NOT connected to the actual instrument in any way other than getting power from it. It is nothing more than a totally independent standalone ovenized 10MHz oscillator. It is powered from the system and there are no signals going from it to the instrument. The only signal, 10MHz output is routed to a BNC connector on the rear panel. You can use it as your EXTERNAL reference or not, it doesn't matter. It can be used as a reference for other instruments and you can use 10MHz reference fed from some other place. Most of the EEPROM is empty. The first 256 bytes seem to be used for serial number and installed options, nothing more. The last 2 bytes in that portion seem to be some kind of a CRC for that portion. Don't have time to check if it is true and what kind of CRC is it if it is true. Then there are several blocks of some data, almost certainly one block per board. It is not incredibly difficult to decipher most of that stuff. The very first thing is to find out how CRC[s] is/are generated so it would allow playing with those constants without causing CRC failures so the 4395A would boot and accept the changed values. Might be interesting project for a bored hacker kid knowledgeable in electronics. I don't have time for this, rather would pay $940 to Keysight ONCE for calibration and then just keep that EEPROM backup. I can't figure the reason they don't want to release the software becauseThe reason is simple -- they charge $940 for most basic calibration with more advanced one reaching $2K+ or so. The ONLY reason they can charge arm and leg and there are no alternatives is that they have that utility and don't release any information on calibration. If that "Adjustment Program" was available almost anybody could be able to calibrate those instruments himself without paying them a single cent. It is called GREED. They turned even worse -- newer instruments don't have ANY calibration information at all and you have to send them to Keysight for calibration. There are NO third party calibration labs that could do it. Well, there are some who claim to be able to calibrate 4395A for $400 but I wouldn't believe they are able to actually do it other than messing with a few trimpots and one trimcap that don't require that proprietary utility and that even a child could do himself after reading a service manual. I do have their B2987A Electrometer/High Resistance Meter that is like that. No calibration info whatsoever and you have to send it to Keysight for that. I have a 3 year contract with them for that one, we'll se how it behaved these 3 years so it might be time to stop calibrating it. I won't even start on all those super-duper LCR meters, be those Keysight, Hioki, BK Precision (which is rebadged Chinese Tonghui), GW Instek or whatever -- they don't even mention anything like service manual or calibration. Tried to get calibration manual from Hioki when thinking about purchasing their IM3636. Thanks the higher beings I didn't make that stupid mistake -- besides mediocre performance even at their golden spot where they put their "Basic Accuracy" there is absolutely no way to calibrate it other than sending to Hioki. Dunno how much they charge for that but almost 100% sure it is not cheap... --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * * |
|
8657J combo info
Hello everyone! ? |
RubenRubio
Paul Bicknell
Francesco
Sergey Kubushyn