ADV3202 - cropped video signals

Question

Hello everybody, 
 
 I have a problem using the ADV3202. All output video signals are cropped at about 900 mV in a manner, that no sync is transmitted. VPOS is connected to +5 V, VNEG is connected to GND, VREF is supplied with 2.5 V and VCLAMP is connected to GND as well. (I tried several connections for VCLAMP and VREF, but neither worked) 
 
 Attached I have a snippet of the schematic and a sample of input and output video signal. 
 
 Can you please give me a hint to solve this problem? Thanks in advance.

EZAdministrator · Accepted Answer

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum. Thank you, EZ Admin)

ADIApproved · Answer

Hi, Daniel. 
 Please resolder the 1k and 2k resistors to all the OSD pins. Can you connect directly to GND the VREF and VCLAMP? 
 Regards, 
 Anna

Electronic Design Services - PartnerZone

Products Mentioned

ADV3202 - cropped video signals