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E4406A Input Attenuator
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Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG |
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开云体育Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fixOn 7/9/2017 2:30 PM,
tony_goodhew@... [hp_agilent_equipment] wrote:
茂驴陆 -- Dave Manuals@... |
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Thanks � I took the unit apart, including opening up the A17 RF Assembly, and there didn抰 appear to be any mechanical relays in there. I couldn抰 find any information on the components closest to the RF input to identify any solid state relays or programmable attenuators.
In checking around I saw that Agilent promised in 2014 to post the CLIPs for the E4406A but they don抰 seem to have followed through on that. Does anyone happen to have them and could send me the A17 one? Thanks, TonyG Sent from Mail<> for Windows 10 From: Artek Manuals manuals@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Sunday, July 9, 2017 11:36 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Subject: Re: [hp_agilent_equipment] E4406A Input Attenuator Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fix On 7/9/2017 2:30 PM, tony_goodhew@...<mailto:tony_goodhew@...> [hp_agilent_equipment] wrote: Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG -- Dave Manuals@...<mailto:Manuals@...> www.ArtekManuals.com<> [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<> Virus-free. www.avast.com<> |
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Tom Miller
Can you get a few good pictures of the RF section and post them? Maybe we can identify how they did the attenuators. Some that I have seen used Gaas smt spdt RF switches for the attenuators. Later 8657 sig gens did this.
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Regards ----- Original Message -----
From: "Tony Goodhew tony_goodhew@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: <hp_agilent_equipment@...> Sent: Sunday, July 09, 2017 5:56 PM Subject: RE: [hp_agilent_equipment] E4406A Input Attenuator Thanks I took the unit apart, including opening up the A17 RF Assembly, and there didnt appear to be any mechanical relays in there. I couldnt find any information on the components closest to the RF input to identify any solid state relays or programmable attenuators. In checking around I saw that Agilent promised in 2014 to post the CLIPs for the E4406A but they dont seem to have followed through on that. Does anyone happen to have them and could send me the A17 one? Thanks, TonyG Sent from Mail<> for Windows 10 From: Artek Manuals manuals@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Sunday, July 9, 2017 11:36 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Subject: Re: [hp_agilent_equipment] E4406A Input Attenuator Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fix On 7/9/2017 2:30 PM, tony_goodhew@...<mailto:tony_goodhew@...> [hp_agilent_equipment] wrote: Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG -- Dave Manuals@...<mailto:Manuals@...> www.ArtekManuals.com<> [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<> Virus-free. www.avast.com<> ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links |
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Hey Tom - Thanks for the reply. David.DiG sent me the CLIP (I'm hosting it here for now听) and that provided the key detail to identify the bits. The top of the board near the input looks like this: but it turns out that the attenuator is on the bottom of the board: This part is AT1, which interestingly doesn't seem to be listed in the parts list but is marked on the schematic and the IC itself as 1GM1-4203. Now either that has failed in such a way to put 15dB of attenuation inline or something in the control circuit has died and is asserting some combination of control lines to drive AT1 to 15dB. I don't know if it is safe to apply an Occam's Razor to this but it does seem more likely that AT1 died than multiple op amps (MC33178D), resistors or capacitors have died. It looks like I might be able to remove the shielding and plug the card in and probe the control lines to see what is asserted. If anyone has any other suggestions I'm open to thoughts/comments. Any idea of where I might get a replacement 1GM1-4203 would be helpful as well. Thanks, TonyG 听 |
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Tom
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Have sent the rf clip to tony--the pictures you are asking for are very easy to find on the internet Fra: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 00:07 Til: hp_agilent_equipment@... Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator Can you get a few good pictures of the RF section and post them? Maybe we can identify how they did the attenuators. Some that I have seen used Gaas smt spdt RF switches for the attenuators. Later 8657 sig gens did this. Regards ----- Original Message -----
From: "Tony Goodhew tony_goodhew@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: <hp_agilent_equipment@...> Sent: Sunday, July 09, 2017 5:56 PM Subject: RE: [hp_agilent_equipment] E4406A Input Attenuator Thanks I took the unit apart, including opening up the A17 RF Assembly, and there didnt appear to be any mechanical relays in there. I couldnt find any information on the components closest to the RF input to identify any solid state relays or programmable attenuators. In checking around I saw that Agilent promised in 2014 to post the CLIPs for the E4406A but they dont seem to have followed through on that. Does anyone happen to have them and could send me the A17 one? Thanks, TonyG Sent from Mail<> for Windows 10 From: Artek Manuals manuals@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Sunday, July 9, 2017 11:36 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Subject: Re: [hp_agilent_equipment] E4406A Input Attenuator Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fix On 7/9/2017 2:30 PM, tony_goodhew@...<mailto:tony_goodhew@...> [hp_agilent_equipment] wrote: Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG -- Dave Manuals@...<mailto:Manuals@...> www.ArtekManuals.com<> [ ted-no-repeat-v1.gif]< m_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclien t&utm_term=oa-3176-b> Virus-free. www.avast.com< =email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_te rm=oa-3176-b> ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links < paign=sig-email&utm_content=emailclient> Virusfri. < paign=sig-email&utm_content=emailclient> www.avg.com |
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Tom Miller
锘�
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The input switch U38听(spdt GaAs) is available. Do a
google search for it. MGS-71018 . I have seen these get lossy at 10 to 20 dB.
That would be the first thing I would try.
听
This should work though it is only rated to 2.5 GHz but has
the same levels:
听
Or maybe find the exact part on google.
听
The attenuator may be hard to find so hope it is the switch.
It is the first thing in line to be damaged by a oops.
听
Tom
听
听
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Tom Miller
开云体育I'm betting it is the GaAs spdt rf switch on the
input that has the loss.
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开云体育Tom et al If the loss is exactly 15 DB i would look for something else. Regards Hardy 听 Fra: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] 听 听 I'm betting it is the GaAs spdt rf switch on the input that has the loss.
听
听 |
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Tom Miller
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开云体育Yes But it completes selftest--so the faullt has to be between rf input connector and rf switch(used only for cal)- first mixer. The selftest checks frontend 听att 1 dB 听steps from 0-40 听with a 50Mhz signal . Hardy 听 听 Fra: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] 听 听 It sure could be something else. Even a low LO to the mixer. 听 听
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Thanks all � For a bit more information here is what I experience:
1. Set sig gen to 50 MHz, 0dBm 2. Measure signal using VSA == -16.25dBm 3. Set input attenuator for 40dB 4. Measure signal using VSA == -15.4dBm 5. Change sig gen to 1000Mhz, 0dBm 6. Measure signal using VSA == -16.2dBm Changing the input attenuator does seem to change where the noise floor is but doesn抰 seem to impact the measured signal at all. This seems strange to me but I am far from proficient using this piece of gear. BTW The unit passes all self-tests & alignments without error but does seem to exhibit a problem (reported here on the forum before) of the LAN connection losing it抯 IP address between reboots). TonyG Sent from Mail<> for Windows 10 From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Monday, July 10, 2017 4:59 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Yes But it completes selftest--so the faullt has to be between rf input connector and rf switch(used only for cal)- first mixer. The selftest checks frontend att 1 dB steps from 0-40 with a 50Mhz signal . Hardy Fra: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 05:43 Til: hp_agilent_equipment@... Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator It sure could be something else. Even a low LO to the mixer. ----- Original Message ----- From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hardyhansen@...%20[hp_agilent_equipment]> To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Sent: Sunday, July 09, 2017 11:05 PM Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Tom et al If the loss is exactly 15 DB i would look for something else. Regards Hardy Fra: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 04:53 Til: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator I'm betting it is the GaAs spdt rf switch on the input that has the loss. ----- Original Message ----- From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hardyhansen@...%20[hp_agilent_equipment]> To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Sent: Sunday, July 09, 2017 9:38 PM Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Tom Have sent the rf clip to tony--the pictures you are asking for are very easy to find on the internet Fra: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 00:07 Til: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...> Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator Can you get a few good pictures of the RF section and post them? Maybe we can identify how they did the attenuators. Some that I have seen used Gaas smt spdt RF switches for the attenuators. Later 8657 sig gens did this. Regards ----- Original Message ----- From: "Tony Goodhew tony_goodhew@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: <hp_agilent_equipment@...> Sent: Sunday, July 09, 2017 5:56 PM Subject: RE: [hp_agilent_equipment] E4406A Input Attenuator Thanks I took the unit apart, including opening up the A17 RF Assembly, and there didnt appear to be any mechanical relays in there. I couldnt find any information on the components closest to the RF input to identify any solid state relays or programmable attenuators. In checking around I saw that Agilent promised in 2014 to post the CLIPs for the E4406A but they dont seem to have followed through on that. Does anyone happen to have them and could send me the A17 one? Thanks, TonyG Sent from Mail<> for Windows 10 From: Artek Manuals manuals@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Sunday, July 9, 2017 11:36 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Subject: Re: [hp_agilent_equipment] E4406A Input Attenuator Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fix On 7/9/2017 2:30 PM, tony_goodhew@...<mailto:tony_goodhew@...> [hp_agilent_equipment] wrote: Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG -- Dave Manuals@...<mailto:Manuals@...> www.ArtekManuals.com<> [ ted-no-repeat-v1.gif]< m_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclien t&utm_term=oa-3176-b> Virus-free. www.avast.com< =email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_te rm=oa-3176-b> ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links < paign=sig-email&utm_content=emailclient> Virusfri. < paign=sig-email&utm_content=emailclient> www.avg.com [Non-text portions of this message have been removed] [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png]<> Virusfri. www.avg.com<> [Non-text portions of this message have been removed] |
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This is normal when you chance att settings-all but noisefloor will remain
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steady-thats one of the good things whith the new type of analyzers-- Hardy -----Oprindelig meddelelse----- Fra: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 16:18 Til: hp_agilent_equipment@... Emne: RE: [hp_agilent_equipment] E4406A Input Attenuator Thanks all - For a bit more information here is what I experience: 1. Set sig gen to 50 MHz, 0dBm 2. Measure signal using VSA == -16.25dBm 3. Set input attenuator for 40dB 4. Measure signal using VSA == -15.4dBm 5. Change sig gen to 1000Mhz, 0dBm 6. Measure signal using VSA == -16.2dBm Changing the input attenuator does seem to change where the noise floor is but doesn't seem to impact the measured signal at all. This seems strange to me but I am far from proficient using this piece of gear. BTW The unit passes all self-tests & alignments without error but does seem to exhibit a problem (reported here on the forum before) of the LAN connection losing it's IP address between reboots). TonyG Sent from Mail<> for Windows 10 From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Monday, July 10, 2017 4:59 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Yes But it completes selftest--so the faullt has to be between rf input connector and rf switch(used only for cal)- first mixer. The selftest checks frontend att 1 dB steps from 0-40 with a 50Mhz signal . Hardy Fra: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 05:43 Til: hp_agilent_equipment@... Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator It sure could be something else. Even a low LO to the mixer. ----- Original Message -----
From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hardyhansen@...%20[hp_agilent_equipme nt]> To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Sent: Sunday, July 09, 2017 11:05 PM Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Tom et al If the loss is exactly 15 DB i would look for something else. Regards Hardy Fra: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 04:53 Til: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator I'm betting it is the GaAs spdt rf switch on the input that has the loss. ----- Original Message ----- From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hardyhansen@...%20[hp_agilent_equipme nt]> To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Sent: Sunday, July 09, 2017 9:38 PM Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Tom Have sent the rf clip to tony--the pictures you are asking for are very easy to find on the internet Fra: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 00:07 Til: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator Can you get a few good pictures of the RF section and post them? Maybe we can identify how they did the attenuators. Some that I have seen used Gaas smt spdt RF switches for the attenuators. Later 8657 sig gens did this. Regards ----- Original Message ----- From: "Tony Goodhew tony_goodhew@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: <hp_agilent_equipment@...> Sent: Sunday, July 09, 2017 5:56 PM Subject: RE: [hp_agilent_equipment] E4406A Input Attenuator Thanks I took the unit apart, including opening up the A17 RF Assembly, and there didnt appear to be any mechanical relays in there. I couldnt find any information on the components closest to the RF input to identify any solid state relays or programmable attenuators. In checking around I saw that Agilent promised in 2014 to post the CLIPs for the E4406A but they dont seem to have followed through on that. Does anyone happen to have them and could send me the A17 one? Thanks, TonyG Sent from Mail<> for Windows 10 From: Artek Manuals manuals@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...> Sent: Sunday, July 9, 2017 11:36 AM To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Subject: Re: [hp_agilent_equipment] E4406A Input Attenuator Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fix On 7/9/2017 2:30 PM, tony_goodhew@...<mailto:tony_goodhew@...> [hp_agilent_equipment] wrote: Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG -- Dave Manuals@...<mailto:Manuals@...> www.ArtekManuals.com<> [ ted-no-repeat-v1.gif]< m_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclien t&utm_term=oa-3176-b> Virus-free. www.avast.com< =email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_te rm=oa-3176-b> [Non-text portions of this message have been removed] ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links < paign=sig-email&utm_content=emailclient> Virusfri. < paign=sig-email&utm_content=emailclient> www.avg.com [Non-text portions of this message have been removed] [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png]< aign=sig-email&utm_content=emailclient> Virusfri. www.avg.com< ink&utm_campaign=sig-email&utm_content=emailclient> [Non-text portions of this message have been removed] ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links --- Denne mail er kontrolleret for vira af AVG. |
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开云体育ok You use the input att to optimize your dynamic range of the analyzer--thats first of all determined by 听the first mixer 2d 3d 听compression point.Most hp analyzers are made to use the full dynamic range with signals below -20dBm--one normally use the input att to place the input signal at that range to have the max dynamic range---or optimize when using an external low noise preamp. Hardy 听 Fra:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] 听 听 This is normal when you chance att settings-all
but noisefloor will remain ----- Original Message -----
From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment]<mailto:hardyhansen@...%20[hp_agilent_equipme nt]> To: hp_agilent_equipment@... .com> Sent: Sunday, July 09, 2017 11:05 PM Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Tom et al If the loss is exactly 15 DB i would look for something else. Regards Hardy Fra: hp_agilent_equipment@... .com> [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 04:53 Til: hp_agilent_equipment@... .com> Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator I'm betting it is the GaAs spdt rf switch on the input that has the loss. ----- Original Message ----- From: 'hardy hansen' hardyhansen@... [hp_agilent_equipment] nt]> To: hp_agilent_equipment@... .com> Sent: Sunday, July 09, 2017 9:38 PM Subject: SV: [hp_agilent_equipment] E4406A Input Attenuator Tom Have sent the rf clip to tony--the pictures you are asking for are very easy to find on the internet Fra: hp_agilent_equipment@... .com> [mailto:hp_agilent_equipment@...] Sendt: 10. juli 2017 00:07 Til: hp_agilent_equipment@...<mailto:hp_agilent_equipment@yahoogroups .com> Emne: Re: [hp_agilent_equipment] E4406A Input Attenuator Can you get a few good pictures of the RF section and post them? Maybe we can identify how they did the attenuators. Some that I have seen used Gaas smt spdt RF switches for the attenuators. Later 8657 sig gens did this. Regards ----- Original Message ----- From: "Tony Goodhew tony_goodhew@... [hp_agilent_equipment]" To: Sent: Sunday, July 09, 2017 5:56 PM Subject: RE: [hp_agilent_equipment] E4406A Input Attenuator Thanks I took the unit apart, including opening up the A17 RF Assembly, and there didnt appear to be any mechanical relays in there. I couldnt find any information on the components closest to the RF input to identify any solid state relays or programmable attenuators. In checking around I saw that Agilent promised in 2014 to post the CLIPs for the E4406A but they dont seem to have followed through on that. Does anyone happen to have them and could send me the A17 one? Thanks, TonyG Sent from Mail for Windows 10 From: Artek Manuals manuals@... [hp_agilent_equipment] Sent: Sunday, July 9, 2017 11:36 AM To: hp_agilent_equipment@... .com> Subject: Re: [hp_agilent_equipment] E4406A Input Attenuator Sounds like you on the right track , If you lucky the relay is just stuck as you say and you might exercise your way out of it... could also have suffered from input overload ...a bit harder to fix On 7/9/2017 2:30 PM, tony_goodhew@... [hp_agilent_equipment] wrote: Hi All, I just acquired an E4406A and put it on my bench. It seems to work fine except that it is consistently reading 15dB low. Poking around I found a control for the input attenuator and that seems to have no impact on the measured value. From there I looked at the services/test guide and ran through the 50MHz Input Attenuator Accuracy test and that showed no change so I think that the attenuator is stuck. Before I start pulling this apart I thought I might check in to see if I'm missed something in the system settings that might cause this? Thanks, TonyG -- Dave Manuals@... www.ArtekManuals.com [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-anima ted-no-repeat-v1.gif] m_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclien t&utm_term=oa-3176-b> Virus-free. www.avast.com =email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_te rm=oa-3176-b> [Non-text portions of this message have been removed] ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links paign=sig-email&utm_content=emailclient> Virusfri. paign=sig-email&utm_content=emailclient> www.avg.com [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png]< http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_camp aign=sig-email&utm_content=emailclient> Virusfri. www.avg.com ink&utm_campaign=sig-email&utm_content=emailclient> [Non-text portions of this message have been removed] ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links --- Denne mail er kontrolleret for vira af AVG. http://www.avg.com
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Did you check input attenuator (if remember 7dB 5W SMA-m SMA-f) just听 behind input N connector? For IP address and real time clock, change the battery on main board -听 Panasonic BR2325 Lithium Polycarbon Monofloride 3V, 0.16 Ah. Milan On 10 Jul 2017 21:02, "'hardy hansen' hardyhansen@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
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