HP 54520 Series Service Manual page 72

Main Assembly
To adjust the high-frequency pulse response
9 Connect the mains power cable and apply power.
Adjustment Procedure
Perform this procedure on the necessary channel only. The adjustment for each channel is
reached through a hole in the heatsink over the acquisition hybrid for that channel Use the
following illustration to locate the adjustments.
Pulse response
adjustment
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Main Assembly Adjustment Locations
1 Connect the pulse generator output to the input of the channel needing adjusting.
2 Press the appropriate channel number key (bottom row) to select the channel menu.
3 Use the input resistance softkey (second from bottom) to select 502 be.
4 Press autoscale , then set the following parameters.
Menu (hardkey) Parameter Setting
Vertical (sensitivity) 40 mV/div
{channel key)
Horizontal (time/div) 5 ns/div
(Setup) (mode) repetitive
Display # of avg 16
(graticule) grid
47