Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[SOLVED] Type of probes required for HP1200B

Status
Not open for further replies.

vivekroy

Full Member level 5
Joined
Jan 19, 2019
Messages
263
Helped
103
Reputation
206
Reaction score
103
Trophy points
43
Location
N/A
Activity points
1,792
Folks,
I have come to seek your help. I found this really old HP1200B oscilloscope. It was literally free. I got it. I am looking for probes for it. It does not appear to be using the standard BNC or SMA connector. Here is a picture.

Can anyone tell me what type of connector is this?
 

Attachments


FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,959
Helped
14,145
Reputation
28,549
Reaction score
12,831
Trophy points
1,393
Location
Bochum, Germany
Activity points
278,225
Screw terminals with 4 mm banana jack. Appropriate for 500 kHz bandwidth.
Notice that the inputs are differential, won't be supported by single ended oscilloscope probes. You are free though to connect coaxial cable through adapter.
 

vivekroy

Full Member level 5
Joined
Jan 19, 2019
Messages
263
Helped
103
Reputation
206
Reaction score
103
Trophy points
43
Location
N/A
Activity points
1,792
Thanks FvM.

I did not follow the last line. Can you please explain it?

A side query, it looks like the terminals of the differential input can be turned off (connected to GND) from the schematics. Do you reckon I can use single ended probes by turning it off?
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,959
Helped
14,145
Reputation
28,549
Reaction score
12,831
Trophy points
1,393
Location
Bochum, Germany
Activity points
278,225
You see that the inputs are differential (+, - and GND)?
 

vivekroy

Full Member level 5
Joined
Jan 19, 2019
Messages
263
Helped
103
Reputation
206
Reaction score
103
Trophy points
43
Location
N/A
Activity points
1,792
Yes, I do see that the inputs are differential. Please see the attached image and my reasoning behind using a single ended probe. It appears each of the terminals of the differential input can be turned off/ac coupled or dc coupled. Am I missing something obvious here?
 

Attachments


FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,959
Helped
14,145
Reputation
28,549
Reaction score
12,831
Trophy points
1,393
Location
Bochum, Germany
Activity points
278,225
I don't understand what your problem is. You can connect anything you want, including a single ended probe through a BNC-to-banana-plug adapter. If the screw terminal spacing is 19 mm, a standard adapter fits.
 

danadakk

Advanced Member level 3
Joined
Mar 26, 2018
Messages
735
Helped
141
Reputation
281
Reaction score
142
Trophy points
43
Activity points
3,517
If you need a manual for this -


Probe capacity matching -


Adapter (measure to see if it fits scope banana jack spacing)

1609285796669.png

Then consider a 1X/10X probe combo. The scope has 1 Megohm in parallel with 45 pF,




Regards, Dana.
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,959
Helped
14,145
Reputation
28,549
Reaction score
12,831
Trophy points
1,393
Location
Bochum, Germany
Activity points
278,225
Here's a picture of the original HP 10111A shielded banana-to-BNC adapter mentioned in the manual. By having a flexible ground cable, you can connect to both inputs simultaneously. If you want something of this kind, you can do it yourself.

1609325418480.png
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top