[time-nuts] Z3815A Antenna Pad Query

Azelio Boriani azelio.boriani at screen.it
Mon Aug 13 18:17:11 EDT 2012


Which type of ohmmeter have you used? What voltage does it use to make the
measure? What polarity? If the voltage is greater than 700mV and the
positive was put on ground maybe some diode has turned on... anyway 2.5K on
5V is 2mA. I have never made such a test on a GPS receiver. I can try on a
TBolt since it is off now.

On Mon, Aug 13, 2012 at 11:40 PM, Jerry <jsternmd at att.net> wrote:

> Hello,
> I am new to the group.  Recently got a Z3815A (module type) and was looking
> at ZL1BPU's User Guide.  Don't ask me why but before I soldered a BNC coax
> to the bottom antenna pads I checked them with an ohmmeter and found 2.5K
> across the signal pad and ground.  I was surprised since there will be a
> 5VDC across them when powered.  I don't have a schematic . is this correct?
> Perhaps someone with a ZA3815A can put an ohmmeter across their antenna
> connector and confirm if normal finding?  I am reluctant to power it up if
> a
> potential problem exists that I could make worse.
>
> Much appreciated
>
> TIA
>
> Jerry
> K1JOS
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