Teledyne LeCroy DA1855A - Manual (Page 77)

Operator’s Manual
922258-00 Rev A 71
j. Verify that the channel 1 input coupling is set to DC and 1MΩ.
k. Set the oscilloscope to display channel 1, the vertical sensitivity to 500mV/div,
timebase to 50 ns/div and trigger source to external ÷10. If necessary, adjust the
trigger level for a stable display.
l. Set the leveled sine wave generator frequency to 10 MHz.
m. Set the leveled sine wave generator output amplitude to exactly 2 Vp-p. (4 divisions
on the oscilloscope).
n. Remove the leveled sine wave generator output cable and termination from the
oscilloscope.
o. Attach to the 50 Ω termination a female to female BNC adapter, a BNC ‘Y’ and a 6”
BNC cable to each end of the BNC ‘Y’.
p. Set both the DA1855A +INPUT and –INPUT to DC.
q. Connect the two free ends of the 6” BNC cables to the DA1855A +INPUT and –
INPUT.
r. Reconnect the AMPLIFIER OUTPUT cable to channel 1 of the oscilloscope. Refer to
Figure 19.
Figure 19, HF CMRR Check Setup