astra 1p 19.2e

solly

Specialist Contributor
Joined
Apr 18, 2004
Messages
6,720
Reaction score
3,925
Points
113
Age
54
My Location
Tel Aviv, Israel
I have an analog receiver (TechniSat ST 3002 S) and a Philips CRT TV on my setup and you can see black screens on the strong carriers which have these ring shaped IQ constellations.

I observed different testing modes for the transponders on 1P being tested:
1. full bandwidth mode - lower power -> no "ring", no "black screen"
2. full bandwidth mode with narrow high power carrier at the transponder's centre frequency ->ring and black screen
3. full bandwidth mode with narrow high power carrier at the lower margin of the transponder (around -12 Mhz from centre frequency with a "tusk"-shaped spectrum on Crazyscan) ->ring and black screen
4. the same as 2. but without full bandwidth "basement" carrier

It is interesting to note that in some tests there are lower power peaks at the opposite polarization which seem to be switched on and off. I have a mechanical polarization skew motor on my setup which is optimized at 9.5 deg West.
ses astra testing signal freuqncy like astra 1n
 

max11

Member
Joined
Mar 9, 2024
Messages
19
Reaction score
18
Points
3
Age
25
My Satellite Setup
Motorized 180cm /3m fixed dish
My Location
Nowhere
analog signal not use dvb2x
Analog signal conditions is different , its easy to get unlike DVB-S2 , so it's early to tell
 

wellikan

Member
Joined
Oct 5, 2015
Messages
53
Reaction score
97
Points
18
Age
44
Website
satdx.club
My Satellite Setup
Dr.HD 1000 Combo, Denys H.265, TBS 6903
GIBERTINI OP 150 S
My Location
Westport 53.81N,-9.54W
11393 H
11767 V
Ea5uD2M.png
 

stephan94

Specialist Contributor
Joined
Jun 30, 2008
Messages
935
Reaction score
1,528
Points
93
Age
67
My Satellite Setup
1.80 Channel master with 6 LNB KU KA C Band 1200 Laminas KU
Openbox SX6 and S3 Mini, Dr HD 15, GTCombo ; Octagon SF 4008 , TBS 6983
My Location
Bavaria
thank you Welikan
this is what IQMonitor can define
8°0W_2411181311_10700-12750 H.jpg8°0W_2411181311.jpg8°0W_11768_H_1.jpg
 
Top