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Old June 7th 07, 11:44 PM posted to rec.radio.cb
james james is offline
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First recorded activity by RadioBanter: Sep 2006
Posts: 298
Default Modulation on scope question

On Wed, 06 Jun 2007 18:55:21 -0400, Vinnie S.
wrote:

+++On Wed, 06 Jun 2007 15:21:49 GMT, james wrote:
+++
+++On Sun, 03 Jun 2007 21:29:09 -0400, Vinnie S.
+++wrote:
+++
++++++I am restoring an old TRC-455, and want to align it by Sams. I have a Tek scope,
++++++but a standard 10x probe. Do I need a probe with a certain bandwidth?
++++++
++++++Vinnie S.
+++*************
+++
+++A scope probe with 50 MHz bandwidth will be suficient. The bandwidth
+++of the probe is stated so that you will avoid attenuation issues at
+++high frequencies. Measurements above the rated bandwidth of the scope
+++probe will yield inaccurate measurement levels. If you are just
+++looking for the presence of a signal and the absolute level is not
+++needed then don't worry to much about the bandwidth of the scope
+++probe.
+++
+++james
+++
+++
+++I just wanted to measure modulation on a TRC-455 that I am restoring. I have a
+++10x probe with the bandwidth being 60Mhz in the 10x position.
+++
+++But I have bad news. I apparently need and RF generator for alignment of the
+++receiver. I do not own one. I have everything else. So off to ebay I go. Any
+++recommendations?
+++
+++Vinnie S.

*****************

I have an HP 8656 generator. A bit pricy even still today. I got mine
at a fantastic price 8 yrs ago. Bought it when the factory was closing
down and moving as excess equiptment for around $400. They are still
commanding around $700 to $1000.

Really for CB work if you can find any of the older B&K CB test
equiptment in decent shape I would suggest those. Equiptment like HP,
Wavetek, and others are very pricy for home test equiptment.

james