Re: Modulation meter accuracy?

On 26 Apr 2007 17:14:56 -0700, Telstar Electronics <briangriffey@xxxxxxxxxxxxx>
wrote:

On Apr 26, 7:01 pm, Vinnie S. <n...@xxxxxxxxxxxx> wrote:
How accurate are these SWR/Power/Modulation meters for modulation? I am
restoring an old TRC-455. I want to get to 100% or just under. I do have a
scope, but figured that would actually be more difficult to measure.


I think a lot has to do with the cost of the meter.
Some of the cheapo ones may be as bad as 25% tolerance... while some
of the better ones may be 15% tolerance.
The scope is a much better tool... and easy to visually see 100%. The
scope would probably be more like 2-3% accuracy.

www.telstar-electronics.com


Do I inject a 1 KHz tone right into the mic plug, or do I have to go thru the
mic?

Vinnie S.
.

Relevant Pages

  • Re: cheap USB analyzer based on FPGA
    ... differential input of the FPGA? ... My scope is old and unaccurate, i'm not sure of the exact acceptable level ... the 1ms frame are still threre but no data ... However concerning the 5V tolerance, i'm not sure it is necessary since ...
    (comp.arch.fpga)
  • Re: cheap USB analyzer based on FPGA
    ... My scope is old and unaccurate, i'm not sure of the exact acceptable level ... Theses frames have a duration of ~200 - 250 us when live video is enabled ... the 1ms frame are still threre but no data ... However concerning the 5V tolerance, i'm not sure it is necessary since ...
    (comp.arch.fpga)
  • Re: Modulation meter accuracy?
    ... restoring an old TRC-455. ... Some of the cheapo ones may be as bad as 25% tolerance... ... The scope is a much better tool... ...
    (rec.radio.cb)
  • Re: Resonator Tolerance
    ... the should the tolerance be? ... If you have a recent vintage digital scope, ... make quasi-accurate measurements for you, ...
    (sci.electronics.design)
  • apache 1.3.9 on TRU64 5.1A restore
    ... I am not sure if this is beyond the scope of this listserv but I will ... Due to a hardware failure I needed to rebuild my DS20 webserver (which ... I thought just restoring the specified directories ... Jane Caldwell-Myers ...
    (Tru64-UNIX-Managers)