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Re: HP 8590 A

 

¿ªÔÆÌåÓý

Hi Carlo,

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you would need more details on what you think seems abnormal, more pictures would be helpful.

It is difficult to know from the calibration constants table alone if you have a problem with your 8590A.

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However, I notice that some correction values ??for the input attenuator are high, there is probably a problem, but it would be necessary to check it to be sure.

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So, if you have noticed that there is frequency drift, this is normal, if the Spectrum respects the specification here.

For a hp8590A, frequency precision is ¡À5.1MHz.

Frequency stability, after 2 hours warmup and 5 min after setting center frequency, is about 50kHz/5min.

?

Yves

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CAL DATA EXPLANATION.PNG
CAL DATA 8590A.jpg

Re: HP 8590 A

 

Hi and welcome aboard!
For some reason your post hasn't come out properly. I'd suggest re-posting it plus another photo of your wider set-up and not just a section of the screen.
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Jinxie
Re: KO4BB manuals site error

 

No problem in Bulgaria.

On Mon, Apr 21, 2025 at 1:46?PM JLJ via <jlj=[email protected]> wrote:
Wrong there is a problem sorry.
Re: KO4BB manuals site error

 

Wrong there is a problem sorry.
Re: KO4BB manuals site error

 

No problems in DK
Unterminated 'TEST' ports

 

Hi all,
?
I note HP have thoughtfully provided an SMB 'TEST' nipple for the RF sampler section of the analyzer I'm currently working on (HP8754A). However, I'd kind of expected to see a 50 ohm termination in situ there to prevent internal reflections from messing things up. But there is none; just the bare nipple. The manual states I should expect to see a 3Vp-p signal at this port if that makes any difference. Should it be terminated with 50 ohms when not plugged into for testing purposes?
?
Thanks,
J.
Re: HP853A+8559A spectrum analyzer.

 

Hey guys,
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Sorry the first one was awful I did it quickly without thinking about it. It's only about the plug-in side power supply for now, I haven't started the display yet.?
The Agilent scan is awful as expected but the schematics survived. The parts list is barely useable, I may invest in Artek scans just for this.
?
I've performed the measurements with both the plug-in installed and out, and with and without the enable pin (T3 "EN", base of Q6) manualy grounded aswell.?
So far only the plug-in out and T3 (Q6 base) manually grounded configuration will give me 100V at T4, otherwise it's more or less 12V all the time.?
?
Transistor is NPN. I've tested it again, this time with the power supply and it's switching with no problems up to 50V and with more than the fuse current. So probably good. I'll put it back together tomorrow, and do some more probing. I may have been too tired.
The fuse and series resistor for the LED are 100% bad though.?
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?
?
Re: HP853A+8559A spectrum analyzer.

 

In case anyone is wondering what the 1854-0232 (selected from 2N3440) is, a 2N3440 is normally rated with BCVE of 250V, the fiche gives an increased BVCE of 300V, HFE can have a wider range too.
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Odd they didn't just use the 2N3439 with BVCE of 350V.
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The "selected 2N3440" comment was from the ancestor to this SA, the 8552A plug-in for the 140/1 series, the 8552 manual doesn't give the "A" suffix, that is an error somewhere from me.
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David
Re: HP853A+8559A spectrum analyzer.

 

I'm getting confused which one is still faulty, or are both still faulty?
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Looking at the barely readable pdf, these are the transistors for the two power supplies;
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A3 Display power supply, output +158V
Q1 = 1854-0311 NPN 2N4240
Q2, Q4, Q5 = 1854-0232 NPN (selected 2N3440A)
Q3 = 1853-0221 PNP 2N5416
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A8 Plug-in power supply, output +100V
Q1, Q2, Q3, Q6 = 1854-0232 NPN (selected 2N3440A)
Q4 = 1854-0311 NPN 2N4240
?
David
Re: HP853A+8559A spectrum analyzer.

 

I don¡¯t have the circuitry in front of me. If your voltages are all positive, and if the pass transistor is PNP, then it should be conducting and pulling the collector voltage down to the 158V you indicated, so my impression is that the pass transistor is open E-C., it could also be something in the E path that is open, not allowing it to sink current.
Anything on the B that is + 0.6 V above E should cause E-C to conduct.

Don Bitters
Re: HP853A+8559A spectrum analyzer.

 

AArnaud,
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Could you clarify if you are performing your measurements with or without plug-in installed?? The 100V rail is enabled by the connecting the plug-in.? Q6 is turned on when the plug-in is removed, which gives the unregulated 200V a path to ground through R2 and R20, thus sinking current away from Q2.? Q2 drives Q4.? So if the plug-in is not installed, it sounds like Q4 is working as it should.? You could ground the base of Q6 if you want to work on the supply without a plug-in installed.? That should enable the 100V rail.??
Re: KO4BB manuals site error

 

?
... It seems that KO4BB again has run out of disk space.
Tried downloading ROM-images for the 70004A.
The site returned an error message, "Unable to create"...
some temorary space...
?
Ulf
SM6GXV
Re: HP3585B Option 001 Firmware

 

Hello everyone,
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It's been more than a year now.
So I would like to ask again if anyone has this software?
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A82U11 03585-60336
A82U12 03585-60337
?
Many greetings Rico
HP 8590 A

  

Good morning to the whole group. I am new here...and I wanted to be part of this group, as an electronics enthusiast and owner of old HP equipment. Specifically, this is my first post, to ask you what you think of the list that my HP8509A, purchased used about 2 weeks ago, gives me, when in the calibration section, I request the cal data. Following the instructions in the service manual and based on other lists seen online, of other 8590, I have the feeling that something is not entirely ok. I attach a photo of the screen. I am grateful to anyone who can provide me with opinions on the matter. Best regards. Carlo.



















				
				
				
			

			
				

				

					
						
	
		
			
				
			
		
		

			
				
			
			
			

				
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							Re: HP853A+8559A spectrum analyzer.
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				
It's getting harder for me to understand. It's also getting late. Also maybe the pass transistor is dead.

First, F3 fuse was blown. I did not pick this up immediately, I should have. Shorting the fuse with the multimeter i'm seeing a 6mA draw and still no 100V output.


I'm kinda bad on transistor theory. I'm seeing the 200V on the collector of Q4, something like 13V on the base and 12V on the emitter. To me it sounds like Q4 is bad.?


What do you guys think?

				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Re: HP853A+8559A spectrum analyzer.
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				
R9, the series resistor for the 100V LED, has failed. This explains the lack of LED.

				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Re: HP853A+8559A spectrum analyzer.
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				
Hey Don,


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I suppose you meant the pass transistor for the 100V plug-in supply as the 158V is display side.


Good point about the associated components creating a spurious voltage, didn't think of that.


I've taken the Motorola 2N4240 pass transistor out and it reads good on the multimeter and on the chinese component tester.?


I'm checking the rest of the circuit. I've digged the groups.io and people have reported just about every possible component can fail.?


We'll see what I find.


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Arnaud.


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							Re: 85672A Spurious Response Utility for an 8563E
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				
On 4/17/2025 12:59 PM, zgoode via groups.io wrote:
Page 4-11 of the operating manual for the 85620A mass memory module shows how to copy DLP's to the cards and how to copy from the cards to the module.? It looks very straightforward.
However, if you try to copy this 85671A DLP from the mass memory module to a card, it will only allow around a column of files to be copied.? The complete Phase noise utility consists of about three and a half three column pages of files when in the memory module.

In any case the Phase Noise utility is limited in use compared to the 3048 system.

Dan

ac6ao

				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Re: 85672A Spurious Response Utility for an 8563E
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				







¿ªÔÆÌåÓý




If you have what is needed to run HPDrive, perhaps you could connect a mock 9122C on your PC with the 8563E and copy the file from HP-IB mass storage?














				
					
					

					




From: [email protected] <[email protected]> on behalf of zgoode via groups.io <zachary@...>

Sent: Thursday, April 17, 2025 2:59:07 PM

To: [email protected] <[email protected]>

Subject: Re: [HP-Agilent-Keysight-equipment] 85672A Spurious Response Utility for an 8563E

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Page 4-11 of the operating manual for the 85620A mass memory module shows how to copy DLP's to the cards and how to copy from the cards to the module.? It looks very straightforward.? I'm still trying to figure out how to pull out to a file over HPIB or
 AUX-port that can be uploaded here since I don't think any computer can read those cards (that I am aware of)







					


				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Re: HP8754A VNA Resurrection
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				
"Sounds like a problem I fixed on the one I have- no sweep. I assume you could put a length of line in S21 mode and see the dot rotate as you change frequency manually?"


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Sorry I'm a bit late answering this; didn't have access to the analyzer. 


I assume you mean with the S-parameter test set with an RF patch cable between ports 1 & 2. Polar display, so should be a dot. Does indeed rotate around the rim of a circle several times as the frequency is increased (manual tuning Zero span/CW) when in B/R mode. HOWEVER, it's not a dot, but once again an *arc* I'm getting, just like the test I did with those two similar dummy loads a few ohms apart. Don't understand why I'm seeing arcs instead of dots with anything other than a dead short or complete open attached to port 1 (and now this transmission test of yours too).

				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
	

	
	
	
	


	

		
		
		
		
		
	

	

		
		
		
		
		
	

	
	

		
		
		
		
	



	

		

			
	
		

			
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