Agilent Technologies 34970A, User Manual, Page: 135 / 356

135
Chapter 4 Features and Functions
Frequency Measurement Configuration
4
Frequency Measurement Configuration
To connect an AC source to the module’s screw terminals, see page 28.
Low Frequency Timeout
The instrument uses three different timeout ranges for frequency
measurements. The instrument selects a
slow , medium , or fast timeout
based on the input frequency that you specify for the selected channels.
• The instrument selects the medium timeout (20 Hz) when the
function is changed or after a Factory Reset (
*RST
command). An
Instrument Preset (
SYSTem:PRESet
command) or Card Reset
(
SYSTem:CPON
command) does not change the setting.
• Front Panel Operation . First, select the frequency function on the
active channel. Then, go to the Advanced menu and select the slow
timeout (3 Hz), medium timeout ( 20 Hz ), or fast timeout (200 Hz) for
the active channel. The default is the medium timeout value .
LF 3 HZ:SLOW
• Remote Interface Operation : Specify the lowest frequency expected in
the input signal on the specified channels. The instrument selects the
appropriate timeout based on the frequency you specify (
see table
above ). The
MEASure?
and
CONFigure
commands automatically
select the 20 Hz (medium) timeout.
SENS:FREQ:RANG:LOW 3,(@203)
Select the slow timeout (3 Hz)
Input Frequency Default Settling Delay
3 Hz to 300 kHz (Slow)
20 Hz to 300 KHz (Medium)
200 Hz to 300 kHz (Fast)
1 s
100 ms
10 ms
34970A Refresh UG.book Page 135 Wednesday, February 17, 2010 12:34 PM