Hi Bob, Markus and all,

73
Hartmut

Am 01.10.2013 08:35, schrieb Markus Vester:

Here are clearer shots of the DCF77 sidebands from the morning:
http://dl.dropboxusercontent.com/u/26404526/dcf77_prn_sidebands_131001_0605.png
http://dl.dropboxusercontent.com/u/26404526/74k_131001_0600.png
Notes:
- the RX antenna is resonant around 75 kHz, which emphasizes the PRN
sidebands below the DCF77 carrier. The fifth and sixth lobe are still
visible. In reality, the upper sidebands are slightly stronger. This is
probably due to an offset (or a 75 kHz notch) in the transmitter antenna
matching, which happens to help us now.
- the Swiss time signal HBG on 75 kHz is no longer on air.
- there is an RTTY signal at 73.6 kHz which could be CFH.
- the 1 Hz lines are surrounded by a somewhat regular fine structure,
consisting of 16.6 mHz spaced sub-lines. This is probably due to parts
of the BCD timecode and weather information data which are repeating or
similar in consecutive minutes.
Best 73,
Markus (DF6NM)