Order Tray | Contact Us | Home | SIG Lists

[aprssig] Picopacket not decoding (was paccom schematic)

Mark Cheavens mcheavens at usa.net
Sat Sep 1 12:57:25 UTC 2007

Let's clarify this a little:
A. Is the transmit OK? (Including levels). What are you using to 
decide that it transmits ok?

B. RX - The audio going into the TNC should be FLAT (no twist). If 
any twist is present it needs to be 0-2 db HIGHER on the HIGH tone. 
It has NO tolerance for a signal going into the TNC with a LOW tone 
that has greater amplitude than the HIGH tone.

At 04:54 AM 9/1/2007, you wrote:
>Yes the tones are clean and not distorted. The high tone is about 6 
>db lower in amplitude the low frequency tone.
>----- Original Message ----- From: "Ray Wells" <vk2tv at exemail.com.au>
>To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>
>Sent: Friday, August 31, 2007 4:15 PM
>Subject: Re: [aprssig] paccom schematic
>>Nick Pugh wrote:
>>>I have a Pacomm Picopacket It will tx ox but is decoding 1 out of 
>>>4 rx packets The input level is set to about 300 mv pp
>>>does the group have any suggestions??
>>>aprssig mailing list
>>>aprssig at lists.tapr.org
>>Have you looked at the audio to the TNC with a CRO to see what the 
>>tones look like? That's the first thing I would do.
>>Ray vk2tv
>>aprssig mailing list
>>aprssig at lists.tapr.org
>aprssig mailing list
>aprssig at lists.tapr.org

More information about the aprssig mailing list