Getting Started
1
Keysight 53147A/148A/149A Operating and Programming Guide
43
Turning the Display Backlight Off or On
When you first turn the instrument 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 Counter’s Channel 2 input connector prior to
turning on the instrument, 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 15 minutes to reach a stable operating
temperature. Since the Reference Oscillator receives power only when the
instrument is on or in Standby mode, no measurements should be taken unless
the instrument has been receiving power 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
NOTE
If your instrument has the Battery option, you can extend the length of time the
instrument can operate from the batteries by turning off the display backlight.
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