For Sale C Band Extended LNB's (4.5 GHz - 4.8 GHz)

M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
Hi,

I have a few spare C Band LNB's for sale that are for the frequency range of 4.5 GHz to 4.8 GHz, sometimes referred to as C Band Extended. The LNB's have a LOF of 5950 MHZ and are of Chinese manufacture. I tested one of the LNB's on 40.5W today and it picked up both of the frequencies that are listed on Lyngsat ( 4581 L and 4641 L ).

The scan test results with one of the LNB's has been posted in the C-Band Extended topic on the forum (post 63 of the topic), link below.

C-Band Extended - SatsUK


Prices:
£57.30p each including Royal Mail Special Delivery (tracked & signed for)
£50.00p each excluding delivery (collection or courier of buyers choice at cost)


I have attached a few pictures below.
 

Attachments

M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
Update:

After more tests with these C Band Extended LNB's it turns out that they have a much wider frequency range than the 4.5 GHz - 4.8 GHz listed on the label. From a LHCP scan of 40.5W with EBS Pro, the lowest frequency detected was 3980 L (ESPN Brazil) plus quite a few other frequencies all the way up into the extended band.

I have attached a picture of the scan result and a couple of EBS Pro signal analyser pictures. Based on the scan result, it seems that the frequency range for the LNB's is 3.98 GHz - 4.8 GHz, offering scope to be used in part of the normal C Band frequency range.
 

Attachments

M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
Update 2:

As a point of interest I compared the SNR dB values between a Chinese C Band extended LNB and a Titanium LNBF. The comparison was done for the LHCP transponder range of 3980 MHz to 4641 MHz. The Chinese C Band extended LNB performed quite well against the Titanium LNBF even though it is specified for 4500 MHz to 4800 MHz and was working on frequencies outside of its specification.

Equipment:
Precision 2.0m prime focus dish
AV-COMM polo pipe
Chinese C Band Extended LNB attached to WR229 flange feed inserted into the polo pipe
Titanium LNBF inserted directly into the polo pipe
TBS 5925 USB device
EBS Pro

I have attached a picture of the scan comparison results below.


40.5W_ 201812_EBSPro_ExtC_AVC_LHCP.jpg
 
M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
Update 3:

The previous tests that I carried out with the C Band Extended LNB's have been confined to LHCP on 40.5W as that is the polarity of the signals in the extended range. However, to further test the scope of the LNB's I ran a signal test for RHCP even though there would be no extended range frequencies detected.

The test revealed that the LNB's can detect signals as low as 3920 MHz which is quite a way beyond the stated specification of 4500 Mhz to 4800 MHz.
With a larger dish the frequency range may possibly be wider as there seems to be some drop in signal level at the extreme lower end of the range.

Equipment:
Precision 2.0m prime focus dish
AV-COMM polo pipe
Chinese C Band Extended LNB attached to WR229 flange feed inserted into the polo pipe
TBS 5925 USB device
EBS Pro

I have attached a picture of the RHCP scan result below.


40.5W_ 20181216_EBSPro_AVC_RHCP.jpg
 
M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
Update 4:

As a further point of interest I compared the SNR dB values between a Chinese C Band extended LNB and a Titanium LNBF for RHCP over the transponder range of 3900 MHz to 4200 MHz.

The Chinese C Band extended LNB performed quite well against the Titanium LNBF for RHCP even though it is specified for 4500 MHz to 4800 MHz and was working on frequencies outside of its specification. The Chinese C Band extended LNB found signals as low as 3920 R.

The C Band extended range was not scanned as there are no RHCP signals on 40.5W in that range.

Equipment:
Precision 2.0m prime focus dish
AV-COMM polo pipe
Chinese C Band Extended LNB attached to WR229 flange feed inserted into the polo pipe
Titanium LNBF inserted directly into the polo pipe
TBS 5925 USB device
EBS Pro

I have attached a picture of the scan comparison results below.

40.5W_ 20181216_EBSPro_RHCP.jpg
 
M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
I don't know where to post, but I have tests with ext 40.5 too

lnbf 1 (cent): LINEAR (3,4 ~4,2) - VERTICAL/HORIZONTAL
lnbf 2 (turbo): CIRCULAR (3,4 ~4,2) - RIGHT/LEFT
lnbf 3 (ext): CIRCULAR (4,5 ~4,8) - RIGHT/LEFT: LNBF AP30 PLL BANDA C MONOPONTO 4.5 ~ 4.8 Ghz - BRASILSAT - E-shop Satélite

View attachment 122127

And the tests:

View attachment 122126

CUSTOM:

View attachment 122124

RANGES

View attachment 122125


Frank,

Thank you for sharing the result of your tets.
There is a topic in the C band section that covers the C band extended range, I have pasted a link to the topic below.


C-Band Extended - SatsUK
 
Top