Differences

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--- faq [2015/07/24 12:51] – [Use by unexperienced people] mh
+++ faq [2016/01/10 16:40] (current) – Unable to get any signal adlerweb
@@ Line 13: / Line 13: @@
 A: What looks like the antenna is just a design feature. ;-) The real PCB antenna is located somewhere else on the board.
-O== Use by unexperienced people
+== I would like to start experimenting with SDR but do not have a rad1o badge (yet)
+A: You can buy a DVB-T dongle with an rtl2832 chip (~15 Euro). They work together with  [[software#rf_analyzer_android|RF Analyzer (Android)]] as well as [[software#gnu_radio_linux_mac_windows|GNU Radio (Windows/Linux/Mac)]]. They are not capable of sending signals, but depending on the dongle they have a frequency spectrum from 64 MHz up to 1700 MHz for receiving signals, which is enough for a lot of experiments.
+== Use by unexperienced people
 Q: I'm going to CCCamp 2015, so I will get a rad1o, but I don't have any experience with radio stuff. What I can use the rad1o for? What will be its practical uses at CCCamp 2015? (also see question below)
@@ Line 21: / Line 24: @@
 == Standalone use by unexperienced people
-(same question than the above one, but specific for people without a laptop)
+(same question as the one above, but specifically for people without a laptop)
+Q: I'm at CCCamp 2015 and I don't have my computer. What can I use the rad1o for?
+A: There probably will be several applications on the rad1o badge itself (so it can be used standalone) like an FM-receiver, spectrogram display, controlling power outlets etc. Look forward to the ideas creative people at the camp will come up with...
+== Clock issues
+Q: How stable is the frequency? How much deviation should be expected?
+A: FIXME
+Q: There is a clock out, whatfor is it? Why is there no clock in? 3 Hardware versions?
+A: FIXME
-Q: I'm at CCCamp 2015 and I don't have my computer. What I can use the rad1o for?
+== Unable to get any signal
-A: There probably will be several applications on the rad1o badge (so it can be also used standalone) like an FM-receiver, spectrogram display, controlling power outlets etc. Look forward to the ideas creative people at the camp will realise...
+Q: I am unable to receive a signal. Neither my PC nor the embedded rfapp show anything
+A: If you are using a bare unit without RF-shield or a case you might have damaged the RF section. Especially the SMD coils shown below (0603USB-951 common mode choke, 63NH, 0.5A) can easily shear off.
+{{ :rf-coils.jpg?100 |}}