Differences

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--- faq [2015/07/26 18:47] – c
+++ 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.
-== You would like to start experimenting with SDR but do not have a rad1o badge (yet)?
+== 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 (~15Euro). They work together with RF Analyzer (Android) as well as GNU Radio (Windows/Linux/Mac). They are not capable of sending signals, but depending on the dongle they have a frequency spectrum from 64MHz up to 1700MHz for receiving signals, which is enough for a lot of experiments.
+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
@@ Line 30: / Line 30: @@
 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
+== Unable to get any signal
+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 |}}