HP 33120A, User Manual

Page: 49 / 118

Output Frequency
(continued)
•
Possible Conflict with Function Change : The output frequency is
automatically adjusted if you select a function whose maximum
frequency is
less than that of the currently active function.
For example, if you output a 1 MHz sine wave and then change the
function to triangle wave, the function generator will adjust the
output to 100 kHz (the upper limit for triangle waves).
From the front panel, “
FREQ LIMIT
” is displayed and the frequency is
adjusted. From the remote interface, a -221, “Settings conflict” error
is generated and the frequency is adjusted.
•
Possible Conflict with Duty Cycle (square wave only) : For output
frequencies above 5 MHz, the duty cycle is limited to values between
40% and 60% (below 5 MHz, the range is 20% to 80%). The duty cycle
is automatically adjusted if you select a frequency that is not valid
with the present duty cycle. For example, if you set the duty cycle to
70% and then change the frequency to 8 MHz, the function generator
will automatically adjust the duty cycle to 60% (the upper limit for
this frequency).
From the front panel, “
% DUTY LIMIT
” is displayed and the duty cycle is
adjusted. From the remote interface, a -221, “Settings conflict” error
is generated and the duty cycle is adjusted.
•
Front-Panel Operation : To set the output frequency, press
Freq
.
Then use the knob, arrow keys, or “Enter Number” mode to set the
frequency.
•
Remote Interface Operation :
FREQuency {< frequency >|MINimum|MAXimum}
You can also use the
APPLy
command to select the function,
frequency, amplitude, and offset with a single command.
Chapter 3 Features and Functions
Output Configuration
58