Performance Tests
TDS 420A, TDS 430A & TDS 460A Service Manual
4-25
e. Check against limits: Do the following subparts in the order listed.
H Use this formula to calculate voltage measurement accuracy.
700 mV -- (mean from step c -- (present mean))
For example:
700 mV -- (347 mV -- (--358 mV)) = --5 mV
H CHECK that the voltage measurement accuracy is
within į20.8 mV.
f. Test all channels: Repeat substeps a through e for all channels.
3. Disconnect the hookup:
a. Set the generator output to 0 V.
b. Then disconnect the cable from the generator output at the input
connector of the channel last tested.
Equipment
Required
One sine wave generator (Item 11)
One level meter and power sensor (Item 12)
One power splitter (Item 13)
One Female N to Male BNC Adapter (Item 16)
Four Male N to Female BNC Adapters (Item 15)
Two 50 ā¦ precision cables (Item 5)
Two 10X attenuators (Item 1).
Prerequisites See page 4--15.
1. Install the test hookup and preset the instrument controls:
a. Initialize the oscilloscope:
H Press save/recall SETUP. Then press the main-menu button Recall
Factory Setup.
H Press the side-menu button OK Confirm Factory Init.
b. Modify the default settings:
H Press TRIGGER MENU.
H Press the main-menu button COUPLING; then press the side menu
button Noise Rej.
Check Analog Bandwidth
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