American QRP Club NUE-PSK Instrukcja obsługi - Strona 2
Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Modem American QRP Club NUE-PSK. American QRP Club NUE-PSK 16 stron. Digital modem
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Drukuj stronęCONTENTS
1)
Introduction ............................................................................................................ 3
2)
Connections ........................................................................................................... 3
3)
Specifications......................................................................................................... 4
4)
Power ...................................................................................................................... 5
5)
Signal Connections................................................................................................ 5
6)
Keyboard ................................................................................................................ 5
7)
Operation ................................................................................................................ 6
8)
Macros .................................................................................................................... 7
9)
Configuration Menu ............................................................................................... 8
10)
Updating Modem Software .............................................................................. 10
11)
12)
Technical Support ............................................................................................ 13
Appendix A: The Radio Cable ................................................................................... 14
Appendix B: Schematic ............................................................................................. 15
Appendix C: Release Notes....................................................................................... 16
Caution:
Shortly after going to production status and starting to ship the first round of modems,
we discovered a problem in the "power supply" area of the pc board. The arrangement
we use with two internal 9V batteries (yielding 18V) was conflicting with an external
power supply when connected to the J1 power connector. Current would flow from the
batteries back to the nominally lower voltage external supply, causing the batteries to
heat up and fail in pretty short order.
Most modems in Round 1 were fixed before being shipped, but some of the earliest
ones were not.
One solution to this condition is to remove the batteries whenever an external
power supply is being used.
A better solution is to make a few simple modifications on the pc board, as
described and illustrated on the NUE-PSK website at
Neither the earlier "EBS" modems nor the later modem kits have this problem. And the
coming Round 2 modems will be okay too.
NUE-PSK Digital Modem Operator's Manual, ver 1.20
www.nue-psk31/batt_mod
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