HP 3325A:
errors on self test 2, 3 (seems misleading )
Output on display: 29mV P-P:
NOTE: Output not terminated to 50 Ohm
scope CH1 AC , and DC are present from generator output at lower peak of waves ( like DC offset , but it OFF)

output on display: 30mV P-P:
same DC offset "0" at bottom of sineway

Then I shorted ACD ,
all tests pass , 1V P-P , became 2.1V P-P unterminated , and everything works , but
no DC offset regulation
this test pass with +20mV off:

and im lost a bit , looking for direction ....
Found - LM311 , A14 board
Fixed , now it need adjustment ... calibration , at the level i can do ....