Re: 8594E CAL: SPAN SENS FAIL
Ozan,
Thank you for the tips.? My observations:
1. I was able to verify +15VF, +5A and +10UF voltages directly on A7.? I need to get an extender to really dig into it :-(
2. In the system diagnostics, +10V Reference (presumably +10UF?) is quite unstable
3. In verifying +10UF, I measured at one end of R105, which connects +10UF to V(REF)+ of the DAC in the third converter ref_cal circuit.? Not knowing which end was which, it was easy enough to find the +10UF (and checking with an o-scope it's quite stable, unlike the system diagnostic), but as it happens the other side of R105 has a very small voltage on it (less than 100 mV).? This doesn't seem right to me.??
As I await my extender, any further insights would be appreciated!
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Re: HP 3852a extended memory modules info
If the connector is still available, it would not be difficult to make a 1MB or 8MB static RAM board.
I did one not too long ago for the Data I/O UNISITE that also uses the MC68000.
The original UNISITE board was DRAM with up to eight 9 bit modules.
With the static RAM, the parity was disabled.
ed
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Re: HP 8360-Series Sweeper CLIP soon available on KO4BB
Am I too stupid to find it or hasn't it been verified yet?
I'm excited to see the CLIPs.
Tom DG8SAQ
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Sorry a correction, by disconnecting the J9P interpanel connector I have disconnected the V33 heater so I could not have had the right voltage out anyway from the -150 supply, regardless I was getting around -165 on C140B. The dV across V34, 80+V, is about right.
Riconnecting J9P only and not J10P the 88V supply should not have worked regularly also since there the 300 V supply contribution is missing? , I am getting 31V instead of 88. Around 200V on the V28 and V29 plates. I tried to regulate the 150V supply and I could do this verya ccurately.
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Re: E440xB Spectrum monochrome display
Thanks for the information! ? Yves ? ? The EMC version of the E440xB has monochrome as standard, with an option for color The "normal" versions has color as standard The colors are gone due to defective backlight? Replace it with two LED strips and a driver, then the colors will be back?(have repaired a few now) Between the backlight and the screen, there is a color filter, which also turns "yellow orange" If you remove it with new LED strips, the screen will be a blue tone Filters are available on e b a y - needs to be cut to size Den torsdag den 2. maj 2024 kl. 19.51.24 CEST skrev Yves Tardif <yves_tardif@...>: Hi, ? Out of curiosity, does anyone know if the E440xB series has an option for a monochrome display. ? I have seen several photos where you see an amber-colored monochrome screen. ? I thought it was perhaps simply the monochrome screen mode which was activated in the SYSTEM, MORE, COLOR PALETTE, MONOCHROME menu...but in my case, the color is green in this mode and not amber (yellow -orange) as in the picture. ? Yves ? 
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Re: HP 3852a extended memory modules info
I haven't looked up the pinout because I really need to get to sleep, but from the photo this board looks *exactly* like a DIO bus RAM board for an HP-9000 series 300 computer. -Dave On May 2, 2024 8:46:01 PM "Maciej Kawalkowski, Liberty Electronics Design and Service LLC" <kawalkowski.m@...> wrote: Here is a collection of data I have on the Hp 3852a expansion port and memory modules :
Its a Dram module opposed to the SRAM internal memory The memory controller used is National DP8409A memory chips are Siemens 41256 There are 4 banks organized in 9bit most likely for parity checking.
The card pictured must be a 1MB version organized in 4 banks, each bank consisting of 9 chips. The 68000 used in the HP can address 8 bit or 16 bit words . Since the card uses parity bits there needs to be a parity bit controller on it as well.
The 68000 processor used the Asynchronous bus control to read and write memory.
User Davorin on EEVblog traced out most of the pins on the connector. HP 3852A Edge Connector
1 NC
2 NC
3 NC
4 NC
5 NC
6 NC
7 NC
8 NC
9 NC
10 NC
11 NC
12 NC
13 NC
14 NC
15 GND
16 GND
17 NC
18 NC
19 NC
20 NC
21 NC
22 NC
23 GND
24 GND
25 NC
26 NC
27 NC
28 NC
29 NC
30 ???
31 NC
32 NC
33 NC
34 ???
35 GND
36 GND
37 RESET
38 NC
39 GND
40 GND
41 NC
42 NC
43 LDS
44 UDS
45 R/W
46 AS
47 GND
48 GND
49 NC
50 A1
51 A2
52 A3
53 A4
54 A5
55 A6
56 A7
57 A8
58 A9
59 A10
60 A11
61 GND
62 GND
63 A12
64 A13
65 A14
66 A15
67 A16
68 A17
69 A18
70 A19
71 A20
72 A21
73 A22
74 A23
75 GND
76 U27 1820-4147 Pin 4 (74HCT573 Octal Latch?) -> D2
77 D0
78 D1
79 D2
80 D3
81 D4
82 D5
83 D6
84 D7
85 VCC
86 VCC
87 D8
88 D9
89 D10
90 D11
91 D12
92 D13
93 D14
94 D15
95 NC
96 NC
97 NC
98 NC
99 NC
100 NC
From < >
-- Dave McGuire, AK4HZ New Kensington, PA
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HP 3852a extended memory modules info
Here is a collection of data I have on the Hp 3852a expansion port and memory modules : Its a Dram module opposed to the SRAM internal memory The memory controller used is National DP8409A memory chips are Siemens 41256 There are 4 banks organized in? 9bit most likely for parity checking. The card pictured must be a 1MB version organized in 4 banks, each? bank consisting of 9 chips.? The 68000 used in the HP can address 8 bit or 16 bit words .? Since the card uses parity bits there needs to be a parity bit controller on it as well.? The 68000 processor used the Asynchronous bus control to read and write memory.    
User Davorin on EEVblog traced out most of the pins on the connector. HP 3852A Edge Connector
?
1????????NC
2????????NC
3????????NC
4????????NC
5????????NC
6????????NC
7????????NC
8????????NC
9????????NC
10????????NC
11????????NC
12????????NC
13????????NC
14????????NC
15????????GND
16????????GND
17????????NC
18????????NC
19????????NC
20????????NC
21????????NC
22????????NC
23????????GND
24????????GND
25????????NC
26????????NC
27????????NC
28????????NC
29????????NC
30???????????
31????????NC
32????????NC
33????????NC
34???????????
35????????GND
36????????GND
37????????RESET
38????????NC
39????????GND
40????????GND
41????????NC
42????????NC
43????????LDS
44????????UDS
45????????R/W
46????????AS
47????????GND
48????????GND
49????????NC
50????????A1
51????????A2
52????????A3
53????????A4
54????????A5
55????????A6
56????????A7
57????????A8
58????????A9
59????????A10
60????????A11
61????????GND
62????????GND
63????????A12
64????????A13
65????????A14
66????????A15
67????????A16
68????????A17
69????????A18
70????????A19
71????????A20
72????????A21
73????????A22
74????????A23
75????????GND
76????????U27 1820-4147 Pin 4 (74HCT573 Octal Latch?) -> D2
77????????D0
78????????D1
79????????D2
80????????D3
81????????D4
82????????D5
83????????D6
84????????D7
85????????VCC
86????????VCC
87????????D8
88????????D9
89????????D10
90????????D11
91????????D12
92????????D13
93????????D14
94????????D15
95????????NC
96????????NC
97????????NC
98????????NC
99????????NC
100????????NC
?
From <>
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Have you got an email address for him? All I get is a log in screen with no option to request access.?
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On May 2, 2024, at 11:41?AM, Harold Foster via groups.io <halfoster@...> wrote:
?One of the best (free) manual sites that I don't see mentioned is Dr. Simon Schr?dle's site: ?
Many are of higher than normal quality - there is a login but all you have to do is send him an email request for the name/password.
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Very interesting i didn't realize some heaters are run in series. I checked the cold resistance of the 88V heaters and is 126 ohm which divided by 14 heaters makes 9 ohm, about right for a single 6.3 V cold heater.
Factory I don't understand the bulb idea completely. Presently the scope absorbs slightly less than 100W, and the fuses would allow for roughly 200W, it's a 2A fuse. If I put a 100W bulb in series the heaters will not heat up enough but with a 200W bulb a short would blow up the fuse. Should I put a 300 W bulb in series and a larger fuse, like 2 or 4 A?
The reason I am hesitant is that my variac is 110V, following a 220 to 110 transformer and at the moment the power cord current runaway, with all the tubes in, is slow enough that I can turn the variac off before blowing the fuse. Most of the time.
Finding an array of large 110V bulbs in Italy now is out of the question.
Anyway I am making progress, unplugged the N 9 & 10 connectors from the 88 V PS board and got around -160 V, not quite -150 but with no load. Is it already time to trim this supply to its correct voltage?
Tomorrow I'll check the 88 V supply.
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Re: E440xB Spectrum monochrome display
The EMC version of the E440xB has monochrome as standard, with an option for color
The "normal" versions has color as standard The colors are gone due to defective backlight? Replace it with two LED strips and a driver, then the colors will be back?(have repaired a few now)
Between the backlight and the screen, there is a color filter, which also turns "yellow orange" If you remove it with new LED strips, the screen will be a blue tone Filters are available on e b a y - needs to be cut to size
Best? Hans
Den torsdag den 2. maj 2024 kl. 19.51.24 CEST skrev Yves Tardif <yves_tardif@...>:
Hi, ? Out of curiosity, does anyone know if the E440xB series has an option for a monochrome display. ? I have seen several photos where you see an amber-colored monochrome screen. ? I thought it was perhaps simply the monochrome screen mode which was activated in the SYSTEM, MORE, COLOR PALETTE, MONOCHROME menu...but in my case, the color is green in this mode and not amber (yellow -orange) as in the picture. ? Yves ? 
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E440xB Spectrum monochrome display
Hi, ? Out of curiosity, does anyone know if the E440xB series has an option for a monochrome display. ? I have seen several photos where you see an amber-colored monochrome screen. ? I thought it was perhaps simply the monochrome screen mode which was activated in the SYSTEM, MORE, COLOR PALETTE, MONOCHROME menu...but in my case, the color is green in this mode and not amber (yellow -orange) as in the picture. ? Yves ? 
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Hi John You are absolutely right! I am also ?no longer sure what we are talking about…The X series start with CXA and so far stop at UXA.They all ?have a lot in common-especially software platform(Apps) Signal Path. The machine-N9020A-..belongs to the MXA family,-most ?sold from mobile facilities in China are the 3.6 Ghz version.They upgraded. The standard N9020A came with a digital IF 14 bit ?BW of 10Mhz-(just like E4406A) the ones sold from china are all with 25 Mhz BW. They all come with Agilent vsa 89600 ver.12.02 and ver. 14 preinstalled—but with no license,just trial!!—and many are loaded with licensed options as Phase noise-Noise figure -analog demod-EDP enhanced display package,with full sweep spectrogram-Extended Noise floor… just to mention a few. So all in all it’s a great machine with nice specs—low price…its just like when we got the E4406A!!I know you remember. Best Wishes Hardy ? ? ? ? ? Are we talking about the EXA version, the cheapest model of the series? Not EXT?
Until someone has real time S/A via FFT option in these, they don't jump out at me. I have a Rigol now at home that goes to 3 GHz and has 40 MHz RT bandwidth that works great. Troubleshooting spread spectrum 915 MHz unlicensed mesh network nodes and also setting up WIFI/Cellular antennas is so much easier. Sinful, I know, to use that name around the HP group. Speaking of which, at work i received a R&S FSW8 in good condition, Win 10, from Valuetronics this week. It is an awesome box, with 160 MHz RT BW. I think it goes circles around the older N9020A's and B's that didn't have low phase noise options.
John
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Are we talking about the EXA version, the cheapest model of the series? Not EXT?
Until someone has real time S/A via FFT option in these, they don't jump out at me. I have a Rigol now at home that goes to 3 GHz and has 40 MHz RT bandwidth that works great. Troubleshooting spread spectrum 915 MHz unlicensed mesh network nodes and also setting up WIFI/Cellular antennas is so much easier. Sinful, I know, to use that name around the HP group. Speaking of which, at work i received a R&S FSW8 in good condition, Win 10, from Valuetronics this week. It is an awesome box, with 160 MHz RT BW. I think it goes circles around the older N9020A's and B's that didn't have low phase noise options.
John
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One of the best (free) manual sites that I don't see mentioned is Dr. Simon Schr?dle's site: ?
Many are of higher than normal quality - there is a login but all you have to do is send him an email request for the name/password.
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Re: E4404B Noise floor with 1DS option
Have a look at the following thread on eevblog's forum:
The guy to contact is: "PA0PBZ". It seems to be a key generated from the serial number.
Also, "fenugrec" (or any other people), do you have a spare tracking generator for sale? I need a 3GHz one for my E4402B.
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If that heater string is open, the +80 and -150 volt supplies should run wide open, because the control tubes would be nonconducting.
Hugh
OK, I see that now—schematic is hard to read. Agree, looks like the two sections depend upon each other.?
Apparently V30 & V33 have their heaters fed from the +88V rail, in the series string of 8 valves, having only +31V is going to prevent the control valve/tubes from working in the -150V & +88V, seems these rails are dependant on each other.
David
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I have had complete copy on my computer, but I have sorted it to my folders and deleted ton of the stuff :D. At least I have copied things from that source to the download folder to speed the thing up. HP stuff should be complete.
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Yes Joel, more or less:
bee.mif.pg.gda.pl/ciasteczkowypotwor/
And there's a readme
Renaud
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Correct. The EXT is nothing like an MXA, except for the processor board being similar construction but not firmware compatible. ? During the transitions form HP to Agilent and Agilent to Keysight, there were short periods of time where the front panels and other places in many instruments had the new name but the software had not yet been updated with the new name in every bit of code. ? ?
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From: [email protected] < [email protected]> On Behalf Of hardyhansendk via groups.io Sent: Thursday, May 2, 2024 9:34 AM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] N9020A ? John This must stop ? The EXT wireless STATIONS ?have nothing hardware in common with the X series-besides it`` seems`` to have same processor board.If one look at EXT and MXA you see just physically they are not compatible…no way to -upgrade- an ext to? x series or the other way. Why ??keysight tell YOU ?from your s /n you got an ext I don’t know—please let me see!!I have serviced several of these -upgraded- to ?mxa`s—all literatures.parts-list ?from agilent/keysight ?match … they are real mxa`s ….Besides one mention cpu/processor upgrade???they are all XP machines!....so no way—no more from me! Hardy ? ? ? Hi Hardy. The EXT is a very similar instrument, possibly cheaper? I contacted Keysight with my serial number and it came back as an EXT so seems it has been upgraded (CPU & O.S?) to MXA. Ok some may be genuine MXAs, mine clearly is not. I don't think it matters and as mentioned I do not want to put buyers from purchasing.
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Dave McGuire
Harold Foster