Teledyne LeCroy DA1855A - Manual (Page 70)

DA1855A Differential Amplifier
64 922258-00 Rev A
k. Divide the DMM reading in step 2-j into the output amplitude measured in step 2-g.
This is the exact attenuation of the attenuator-termination combination.
l. Record the result as ‘Exact Attenuation’ to four digit resolution in the Test Record.
m. Disconnect the termination/attenuator/BNC Tee combination from the Banana Plug
adapter on the DMM.
n. Connect the terminated end of the termination/attenuator/ BNC Tee combination
to the DA1855A +INPUT.
o. Connect the DMM to the free female end of the BNC Tee connector using the
previously removed cable.
Figure 12 X10 Gain Accuracy Setup
p. Adjust the sine wave generator output amplitude to read200 mVrms ± 50 mV on the
DMM.
q. Record the DMM reading to 100 μV resolution as ‘Sine Wave Generator Output
Voltage’ in the Test Record.
r. Disconnect the DMM cable from the BNC Tee and remove the BNC to banana plug
adapter from the cable and DMM.
s. Connect the DMM cable to the DA1855A AMPLIFIER OUTPUT connector.
t. Insert the precision 50 Ω termination between the other end of this cable and the
input of the DMM. See Figure 13.
u. Set the DA1855A GAIN to X10.