If the monitor was one of the older units, then the modules have proper
factory calibration data loaded in them for the entire spread up to 1000 MHz
(plus the 1700-2000 segment). The firmware reads the cal data on startup.
If it's one of the newer units that doesn't have modules which were
factory-cal'ed to operate at the lower frequencies but somebody back-rev'ed
the firmeware to "open it up" to cover the lower frequencies, then all bets
are off as far as accuracy goes.
--- Jeff WN3A
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of [email protected]
> Sent: Tuesday, December 15, 2009 6:55 PM
> To: [email protected]
> Subject: Re: [Repeater-Builder] Re: HP E-8285A Service Monitor
>
>
>
> At 12/15/2009 08:01, you wrote:
> >Mel, some of the 8285s can be re-programmed to go from about
> 1 MHz to 1000
> >MHz as mine does. I am mainly interested in the 140 MHz to
> 470 MHz as I
> >work the 2 meter and 440 ham bands as well as GMRS and a
> little commercial.
>
> I'm curious as to how close the sig. gen. amplitude
> calibration is in those
> bands. Is it anywhere close to accurate (+/- 1.5 dB) or is a
> correction
> factor going to be required?
>
> Bob NO6B
>
>
>
>
>
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