1 Getting Started
38 Keysight 53150A/151A/152A Operating Guide
Turning the Display Backlight Off or On
When you first turn the Counter on, the backlight for the LCD display is always lit.
You can toggle the backlight off and on by pressing the Shift key and then the
On/Off (Clear) key, as shown below.
NOTE
If a signal was applied to the Channel 2 input connector prior to turning on the
Counter, CH2 NO SIGNAL is displayed momentarily. As soon as the Counter
acquires the input signal, it displays the signal’s value.
NOTE
The internal Reference Oscillator requires 10 to 15 minutes to reach a stable
operating temperature. Since the Reference Oscillator receives power only when
the Counter is on or in Standby mode, no measurements should be taken unless
the Counter’s Main ~ Power switch has been in the on (1) position for at least
that amount of time.
Shift
Ch 2
Freq
Shift
Shift
Ch 2
Freq
Shift
Ch 2
Freq
On/Off
Clear
Ch 2
Freq
On/Off
Clear
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