Differences

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--- communication:uplink [2007/12/01 17:37] – rocketboy
+++ communication:uplink [2008/07/19 23:33] (current) – external edit 127.0.0.1
@@ Line 2: / Line 2: @@
 This is a proposal for a small uplink (ground to balloon) radio system:
-Ground Station:
+===== Ground Station =====
-  * 70cms (434MHz) Ham RADIO transmitter
+  * 70cms (434MHz) Ham RADIO transmitter running 10W FM into
+  * 10dbi yagi
   * PC
-  * packet radio TNC - or software soundcard TNC (such as AGWPE or TrueTTY)
+  * packet radio TNC - or soundcard software TNC (such as AGWPE or TrueTTY)
-Balloon System:
-  * Good quaility 434MHz "licence exempt" type NBBFM module
-  * Single PIC chip decoder based on N0QBH "simpler" code
+===== Balloon System =====
+  * **Good quaility** 434MHz "licence exempt" type NBFM module
+  * Single PIC chip decoder based on N0QBH "simpler" code - [[http://www.ringolake.com/pic_proj/zcd/zcdmodem.html|See Here]]
 Although the N0QBH decoder does not use DSP techniques the expected preformance should be quite good given the channel is running over FM.
+Prototype system built on fibregalss matrixboard 60 x 26 x 12mm - weight 20g (including receiver module).
+**Good quality:** Aim for sensitivity of -120dBm (0.22uV into 50ohm) for 12dB SINAD (signal + noise to noise ratio) and a 6db bandwidth selectivity of 10Khz (-/+5Khz).
 {{communication:simpler.gif|}}