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4 votes
4 answers
13k views

How can I decode an AFSK 1200 baud audio clip? (ISS)

1 vote
2 answers
1k views

GFSK Demodulationsoftware

2 votes
3 answers
550 views

FT-450D not transmitting with microphone

2 votes
1 answer
2k views

How to send DMR SMS using MMDVM modem or hackrf?

6 votes
7 answers
8k views

Are there any commonly used digital modes that work with an FM transceiver?

0 votes
1 answer
73 views

Transfer digital data over ham radio frequencies using QPSK modulation SSB-QPSK transmitter

1 vote
0 answers
113 views

Is APRS the tracking protocol for the BTech GMRS PRO or the Vero 75 Ham version

0 votes
2 answers
73 views

FSK: Selecting center frequencies and Carson's Rule

0 votes
2 answers
56 views

Why does Tone Spacing decrease with increasing T/R Periods in WSJT-X modes?

4 votes
1 answer
147 views

What value goes in the AX.25 PID field if the Layer 3 protocol is not defined in the standard?

3 votes
2 answers
153 views

What exactly are Gold sequences and how are they used?

0 votes
2 answers
431 views

Cannot establish AX.25 connection to RMS gateway

1 vote
1 answer
111 views

How do you open ax.25 ports?

0 votes
0 answers
43 views

How to configure Microham Device Router to force PTT on audio jack for FT-847 using Microham Digikeyer II?

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