Changing the Default Settings 4Keysight U1401B User’s and Service Guide 81Setting the data hold/refresh hold mode– To enable the data hold mode (manual trigger), set this parameter as “OFF”.– To enable the refresh hold mode (automatic trigger), set the variation countwithin the range of 100 to 1000. Once the variation of the measured valueexceeds this preset variation count, the refresh hold mode will be ready totrigger and update a new value.bAud Baud rate 2400 Hz,4800 Hz,9600 Hz,19200 HzSets baud rate for remote communication with aPC (remote control)9600 HzbLit Display backlighttimer1 to 99 s Sets the timer for automatically turning off theLCD display backlight30 secOFF Disables the LCD display backlight fromautomatically turning offAoFF Auto power off 1 to 99 min Sets the timer for auto power off 15 minOFF Disables auto power off[a] The temperature menu item will only be visible and selectable if the shifted mode is on. Press SHIFT for more than one second to enable thetemperature options.Table 4-1 Setup options and default settings (continued)Menu item Available setting options Default factory settingDisplay Description Display Description