Agilent Technologies 8590 Series Service Manual page 572

Softkey Descriptions
Softkey Descriptions
CAL TIMEBASE Calibrate Timebase
D Note that this function is available for 8591 E-Series
ESCRIPTION
spectrum analyzers and 8591C cable TV analyzers only.
Analyzers equipped with Precision Frequency
Reference, do not use this softkey function.
Use this softkey to change the setting of the 10 MHz
reference (standard timebase) DAC.
The −2001 Hz passcode must be entered to activate this
function.
The DAC controls the frequency of the internal 10 MHz
oscillator over a frequency range of approximately
65 ppm. At a 10 MHz nominal frequency, one DAC
count provides a resolution of less than 0.5 ppm. The
DAC has an adjustment range of 0 to 255.
Refer to the 10 MHz frequency reference adjustment
procedure in
use of
Be sure to press
setting.
R S
ELATED OFTKEYS
DEFAULT CAL DATA
VERIFY TIMEBASE
DISPLAY CAL DATA
572
Chapter 2 for further information on the
.
CAL TIMEBASE
CAL STORE
CAL STORE
to store the time base DAC
Chapter 13