"Sven Schnelle" <svens@...> writes:
"Scott Vance via groups.io" <scott_l_vance@...> writes:
In the process of fixing 9 pcs E5071C, I have noted that at least
three of them have low output power on both channels
(-26 dBm on two, -31 dBm on the third). I confirmed that the faulty
component was the Vernier Leveler and then took this
apart to take a look. It seems like it's always the expensive
Did you make any progress on this?
I just finished fixing the mainboard issue on my E5071C. Measured the
output power on the Ports when set to 0dBm and all have around -23dBm
level. So looks to me like my E5071C has the same issue. The only
thing that i find odd is that bridging two ports shows a straight
S12/S21 line at 0dB. I would expect it to be around -20dB. How is that
on your units?
Seems to be some intermittent failure on my unit. I removed the Vernier
leveling module this morning, to measure levels at the various stages.
Surprisingly enough after inserting it again the output level of the
E5071C is now at about -2.5dBm. Wasn't able to reproduce the issue by
bending the PCB a bit. Lets see, i guess it will happen again.
And it looks like the 1GG7-4243 was already replaced at some point in
time.
