Tektronix TDS1000B Series Operator's Manual page 209

This procedure assumes that the oscilloscope retains the
settings from the previous procedure.
To select a coupling type for a trigger, follow these steps:
1. In the TRIGGER section, push the TRIG MENU button.
2. Push the appropriate side-screen menu button to select
Coupling HF Reject.
3. The displayed waveform shifts to the left. This is
because the triggering signal is slowed down, which
causes the actual trigger to occur later, relative to the
displayed signal.
4. In the TRIGGER section, push and hold the TRIGGER
VIEW button.
TDS1000B and TDS2000B Series Oscilloscopes – Operator Training Kit
Using TRIGGER Controls
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