Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Extended C-Band PLL LNB

Status
Not open for further replies.

hishamuddinjohari

Newbie level 4
Joined
Aug 27, 2009
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Malaysia
Activity points
1,319
Hi All,

Anyone can help me to recognize LNA stage 1 to 3. I try to repair the CalAmp Extended C-Band PLL LNB. The problem is the the receiver received -45dBm and the BER 0.2. So I suspect the first stage LNA through stage 3 LNA. I've replaced the Bias IC ZNBG400 but no improvement on the reading.
Anyone can suggest the suitable components suitable to replace?
The pictures shows the 1st and 2nd stage LNA (I guess).
LNA stage 1 codes C. LNA stage 2 and 3 marked A9 (SOT343)

Thank you in advance.
 

Attachments

  • DSC00360.JPG
    DSC00360.JPG
    266.3 KB · Views: 15
Last edited:

hishamuddinjohari

Newbie level 4
Joined
Aug 27, 2009
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Malaysia
Activity points
1,319

tony_lth

Advanced Member level 5
Joined
Jul 28, 2010
Messages
2,022
Helped
376
Reputation
754
Reaction score
371
Trophy points
1,363
Location
Beijing
Activity points
12,008
You can replace with ATF54143, and you must design the input match circuit for ATF54143, otherwise that's vain.
 

ledum

Junior Member level 3
Joined
Sep 16, 2009
Messages
28
Helped
13
Reputation
26
Reaction score
11
Trophy points
1,283
Location
Kiev, Ukraine
Activity points
1,425
I guess, that C=NE3512S02 and A9=MGF4931AM (A), Jan 2009 (9)
To vfone. C-Band PLL LNB with $10 Where is it!?
 
Last edited:

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top