EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: JLM on February 24, 2014, 02:30:41 am

Title: Type of RF connector inside HP 8901A?
Post by: JLM on February 24, 2014, 02:30:41 am

I have an HP 8901A modulation analyzer.  I need to adjust the internal frequency counter, which is accomplished by feeding a 10 MHz external signal onto an RF port inside the machine and then adjusting a pot.  I am not familiar with the name of the connector -- it's really tiny though and is gold colored.  It"s a female, and there are several male to male cables  of this connector type jumping between various ports. Once I know the name of the connector I can order one and then rig a cable to  take a BNC output from my frequency source into the analyzer.  Do any of you know the name of this connector?

Title: Re: Type of RF connector inside HP 8901A?
Post by: aholtzma on February 24, 2014, 03:16:27 am

Best if you post a photo. Your 'gold and tiny' description could match just about any RF connector.

Title: Re: Type of RF connector inside HP 8901A?
Post by: VK5RC on February 24, 2014, 05:49:57 am

Try looking up the microwave encyclopaedia,  it has a good " identify that rf connector"  section,  a common inside the box connector is a smb,  often confused with mcx,  best of luck.

Title: Re: Type of RF connector inside HP 8901A?
Post by: bbarry on February 24, 2014, 07:28:53 am

I believe they are SMC connectors.

Title: Re: Type of RF connector inside HP 8901A?
Post by: JLM on February 24, 2014, 01:22:26 pm

Here's a photo. Please advise

Title: Re: Type of RF connector inside HP 8901A?
Post by: c4757p on February 24, 2014, 01:37:03 pm

Well, after carefully enhancing the image...

(http://deus-ex-machinima.net/pics/csi_enhance.jpg)

I've come to the conclusion that they look kind of like SMB connectors.

(http://www.wa1mba.org/SMB.jpg)

Title: Re: Type of RF connector inside HP 8901A?
Post by: JLM on February 24, 2014, 01:58:19 pm

LOL!!!  Here's a close up...

Title: Re: Type of RF connector inside HP 8901A?
Post by: c4757p on February 24, 2014, 02:03:23 pm

SMC.

Title: Re: Type of RF connector inside HP 8901A?
Post by: w2aew on February 24, 2014, 02:03:51 pm

That's an SMC
http://www.microwaves101.com/encyclopedia/connectors_smc.cfm (http://www.microwaves101.com/encyclopedia/connectors_smc.cfm)

Title: Re: Type of RF connector inside HP 8901A?
Post by: JLM on February 24, 2014, 02:24:44 pm

Thanks!!  ps - I love your vids, have learned so much from them