HP 1660 Series Service Manual page 90

Set up the Format menu.
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a a Press the Format key. Select Timing Acquisition Mode, then select Transitional Full
Channel 125 MHz.
b b Select the field to the right of the Pod 1 field, then select ECL.
c c Select the field showing the channel assignments for Pod 1. Deactivate all channels
by pressing the Clear entry key. Using the arrow keys, move the selector to
Channel 0. Press the Select key to put an asterisk in the channel position, activating
the channel, then press the Done key.
Press the Trigger key. Select Clear Trigger, then select All.
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To test the time interval accuracy (logic analyzer)
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