2
Operating Your Instrument
114
Keysight 53147A/148A/149A Operating and Programming Guide
3 Press the Enter key to activate the setting and exit the Menu.
The setting you chose is put into effect, and the Menu closes.
If you need to exit the Menu without changing any of the settings, press the
Clear
key. To restore the setting of any menu item to the setting that was in
effect when you opened the Menu, press the
Reset/Local
key
(this restores the original setting for the current menu item but does not close
the Menu).
The Menu contains the following items (these items are displayed in the order
they are listed if you repeatedly press the up-arrow key after opening the
Menu):
–
REF OSC
— Sets the Counter to use the internal timebase (
INT
) or an
external timebase (
EXT
) connected to the Reference connector on the back
panel.
–
PWR REF
— Turns the reference signal available on the Power Meter Output
connector ON or OFF.
–
SAVE
— Saves a copy of the current user settings in non-volatile memory.
Nine sets (
0 – 8
) can be saved, and Set 0 is automatically read on startup.
–
RECALL
— Reads and implements a stored set of user settings from one of
nine (
0 – 8
) that are stored in non-volatile memory.
–
CH1 LPF
— Turns the Channel 1 Low-Pass Filter (approx. 50 kHz)
ON
or
OFF
.
–
FM
— Turns the Counter’s ability to compensate for frequency modulation
on (
AUTO
) or
OFF
.
–
BAUD
— Sets the data rate for the RS-232 serial port (
1200
,
2400
,
4800
,
9600
,
14400
, or
19200
).
–
PRESET
— Resets all functions to the factory-default settings.
– Model number, firmware version number, serial number,
OPTNS
(installed
options).
–
OP HRS
— Displays the total number of hours the instrument has been in
operation since it was last calibrated.
–
BATT VOLTAGE
— Displays the current voltage level in the rechargeable
battery packs (only if the Battery option is installed).
–
DO SELF TEST
— Starts the sequence of built-in tests.
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