DL7APV Pulsare detection

 

B0136+57

 

Bandwidth 2,2MHz with RTL-dongle and IW5BHY software Tempo for recording and folding and presto folding after conversion

Bandwidth 10MHz with airspy SDR and Presto Software for recording and folding

Recorded File

After conversion: B0136+57_win_1.fil

Recorded File

After conversion: b0136+57.fil

 

Record date: 2021 aug 9 Start 7:53UTC 6h

Local antenna direction from Az/EL 305/51 to 350/22

 

RTL settings:

Frequenz : 431.200 MHz, Gain 40dB

-s 2048000

 

Bin2fil data:

 

Rfifind -o mask -time 1 -timesig 4 -freqsig 37 -chanfrac 1 -intfrac 1

 

Airspy settings:

 

rec_gui:

ACQ time (s)

21600

Sample rate

10MSPS (airspy)

SR time series

2KSPS

Num chan

25

Frequency (MHz)

433.5

RF gain (dB)

30

IF Gain (dB)

8

BB gain

0

DIG gain

2

 

 

Bin2fil settings:

 

Conv start

0

Length

21600

Ampli

2

Filt H

115

Filt L

0.2

Filter typ

Bessel

Source name

 

DEC

 

RA

 

Center frequency (MHz)

433.5

SR

10MSPS (airspy)

SR error (ppm)

0

SR time series

2KSPS

Channels

25

 

 

Rfifind -o mask -time 1 -timesig 4 -freqsig 37 -chanfrac 1 -intfrac 1

 

Quiet with typical electrical fence from neighbor

 

 

 

Unusual drift of signal

 

 

And as well unusual value of SR error for best S/N

 

 

 

 

 

The peak of the DM is better visible as in 2MHz

 

S/N in 2MHz is 17,97

 

 

S/N in 10MHz is 18,95

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Older recordings with 2MHz

 

 

 

 

back

 

 

Last update august 2021