Tool/software:
Hi all
I am using 3 LMH6586 switches in one of my projects, which I am using to switch STANAG 3350B signals, R, Gs, and B for respective switches. All switches are configured with 2x Gain.
STANAG standard states the blanking level of R, Gs, and B should be at 0v. Voltage levels are
R, B Channel :
Blanking - 0 V; White Level - 0.7 V
G Channel:
Sync tip- (-0.3 V); Blanking Level - 0V; White Level - 0.7V
As LMH6586 is a single voltage device. We are using additional circuits to bring the Gs signal below 0V after the LMH6586 output.
However, for the R and B switches, we keep the Vref_Clamp pin(66) to GND. There we are seeing a loss, if the Vin is 1Vpp( 0V to 1V) the output is 0.98Vpp(20mV to 1V). And when there is no input being fed and that input is switched to some output we see a voltage of 60mV DC.
For the Gs switch we kept Vref_Clamp to 100mV and we didn't observe any loss when a video was being switched. But when there is no video we see a voltage of 175mV at the output.
Please suggest any solution to avoid the DC and move the R and B video to 0V.
Thanks
Ajay Patra
