Acterna SPM-32A - Frequency Entry (STEP: Keypad, Adjustable Step Width)

SPM-32A ... SPM-36A 4.2 Operation and features
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If you hold the keys down, the frequency will change in steps
automatically. With the single arrow keys, the step size is then
10 Hz instead of 1 Hz.
4.2.3.2 Frequency entry (STEP: keypad,
adjustable step width)
The selective receiver is selected when the following key is
pressed.
The receive frequency can be altered in the following ways:
– Numerical entry using the number keys (like TUNE).
– In steps of ∆F using the up / down keys. The step width,
∆F, can be adjusted.
Fig. 4-7 Typical STEP mode display
STEP
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