¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Messages Topics Expanded
Date
Re: E4401B No 50MHZ Cal signal
It never hurts to double check such things. :-) Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ Sent: Saturday, March 30, 2019 1:42:02 PM To:
By Michael Williams · #95603 ·
Re: E4401B No 50MHZ Cal signal
I asked because I ran into this problem with my E4403B.? There was no cal signal and it didn't not automatically turn on when calibrating.? I found that I had to turn it on manually. Tom
By Tom B · #95602 ·
Re: E4401B No 50MHZ Cal signal
Thanks Tom, Yes, it is turned on. Mike Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ Sent: Saturday, March 30, 2019 1:40:15 PM To: [email protected]
By Michael Williams · #95601 ·
Re: E4401B No 50MHZ Cal signal
Here's how to turn it on from the menu Enable the internal 50 MHz amplitude reference signal as follows: (ESA E4401B and E4411B)Press Input/Output, Amptd Ref(On).
By Tom B · #95600 ·
Re: E4401B No 50MHZ Cal signal
Yeah, This has me scratching my head. Power supplies on a8 look good. Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ Sent: Saturday, March 30, 2019 1:22:52 PM To:
By Michael Williams · #95599 ·
Re: E4401B No 50MHZ Cal signal
Hmmm.. Ok.? -20dbm and 21.7Mhz.? Interesting case of trouble.? Controller / PLL power supplies in check?? Loops locked I guess, thinking what else to check.
By rpoz28cam · #95598 ·
Re: E4401B No 50MHZ Cal signal
Hi Jon, Yes, I see an IF signal coming out of A8J3 when I follow the RF verification procedure when using an *external* 50 MHZ source. The signal does very with attenuation, as describe in the service
By Michael Williams · #95597 ·
Re: E4401B No 50MHZ Cal signal
Mike, Can you see a 21.7Mhz IF signal on the cable plugged into A3J2?? I was looking over pages 55 - 75 of the ESA Service guide for a E4401B and there is a verification process to check on RF deck
By rpoz28cam · #95596 ·
Re: E4401B No 50MHZ Cal signal
Hi Tom, I have verified that the 50 MHz ref is turned on in the input menu. I would expect that should turn it on, as would the automatic alignment process. If there is another setting somewhere that
By Michael Williams · #95595 ·
Re: E4401B No 50MHZ Cal signal
Did you make sure the cal signal was turned on?? You can turn it off on the E4401B.
By Tom B · #95594 ·
Re: E4401B No 50MHZ Cal signal
Mike, I guess I cannot help w/o the CLIP. I'll take a look on Monday and get back to you. In the mean time, good luck! These are nice instruments to work on (except for all those screws!) Mark
By Mark Bielman · #95593 ·
Re: E4401B No 50MHZ Cal signal
Hi Mark, Thanks for the reply and the thoughts. From the info in my CLIP, the 50 MHZ CAL signal is generated by dividing the 800 MHZ 2nd LO by 16. The 2nd LO gets its power from the TEST MUX (U56).
By Michael Williams · #95592 ·
YTO / HP 5086-7781 & Introduction rehashed (just incase)
Hello group, I can't remember if I have introduced myself in the past or not.? If my memory serves me correctly I might have.??Just to be safe,? I am Jon, and reside in Texas, USA.? Passion and
By rpoz28cam · #95591 ·
Re: E4401B No 50MHZ Cal signal
Hi Mike, I do not have my CLIP (it's at work) but I recently repaired a couple of these ESA's, although different issue. (LO UNLOCK error) As I recall, the 50 MHz is generated by a dedicated PLL that
By Mark Bielman · #95590 ·
Re: E4401B No 50MHZ Cal signal
I¡¯m just trying to get the unit to do its own automatic internal alignment by doing selecting the ¡°system->Alignment->Align Now¡± menu option. I am not tweaking stuff manually. I know the perils
By Michael Williams · #95589 ·
HP and Tek CRTs at Stuff Day, April 13th
In our quest to make a lot more space, we are blowing out our Tek and HP CRTs at stuff day. Any tube, just $10 each.? In just ONE room, I found all of these types, and there are two more large areas
By walter shawlee <walter2@...> · #95588 ·
Re: E8357A upgrade questions
If this were a SATA drive, you could use something like this: https://www.amazon.com/SATA-Hard-Drive-Duplicator-Eraser/dp/B00G6TG5YE Of course, the older PNAs use PATA drives, so you would be forced
By Caesar Valenti · #95587 ·
Re: E4401B No 50MHZ Cal signal
I? have to agree with Peter,? please do not adjust any of those "loose screws"? it will be the end of life for that one unless you're ready to get real serious with band pass filtering alignment
By rpoz28cam · #95586 ·
Re: E4401B No 50MHZ Cal signal
Hello Mike, I would first check out that Local Oscillator, I suspect your's is not there.? If I recall the cal signal is derived from the root source (YIG LO) which is fed as a reference into the 1st
By rpoz28cam · #95585 ·
Re: E4401B No 50MHZ Cal signal
The only advice I can offer is not to adjust anything until you fix the problem. I don't have this instrument. Hopefully you have a good block diagram and a description to figure it out. You are lucky
By peter bunge · #95584 ·
55721 - 55740 of 151283