BB60C+TG44A strange behavior

Hi
I have connected the TG44A to BB60C with a DC-block.
The “TG sync” of TG is connected to “trg/sync” of BB60C.
When I set the spam from 10KHz to 100MHz the graph is strange, like in the attached image.
If I change the upper limit to 95Mhz or 105Mhz the graph became “normal”.
Is it normal or something is not working properly ?
Can I remove the dc block, or is necessary for not damage the BB60C ?
Thank

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Hello Bindinir,

Thank you for sharing this picture. I was able to reproduce this issue without the DC block, (which isn’t required). It looks like a bug with our software at this very specific setup. If you change your stop frequency to 90MHz or 110MHz I noticed it no longer occurs and sweeps normally. I will explore this more. In the meantime are you able to change the stop frequency to one of these other values and continue use? If you encounter other issues you can let me know here or email me directly at aj at signalhound dot com. I can try to fix these before the next release.

Regards,
Andrew

[BINDINIR]

Hello Andrew
Thanks Andrew for the fast response.
I can change the stop frequency and use the instruments.
I can wait the fix in the future release.
When is the scheduled the next release ?
Thank a lot.

• This reply was modified 6 years, 7 months ago by BINDINIR.

I’m hoping for later this week or early next week on the Spike release. Thank you for your patience.

Regards

Hello Andrew.
With the new release of Spike the problem was solved.
Thanks a lot!

Why BB60C is not suitable for scalar network analysis below 100KHz ?

The BB60C has a built-in DC block. We correct amplitude down to 9 kHz, but there is a lot of VSWR below 100 kHz, making scalar measurements difficult

[Author]

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