Keysight 53220A Mode D'emploi page 84

3 53220A/53230A Measurements
Figure 3-1
measurements with an example one second gate time.
start
1
edges required for reading
determined by gate time
gate open
Gate In/Out BNC:
OUTput:STATe ON
OUTput:POLarity NORMal
Figure 3-1
Gate time/edge count
frequency determine the number of edges required to produce the first reading in
the sample count. All subsequent readings in the count are based on the same
number of edges used for the first reading. Gate time is per reading.
Start/stop edge
same edge which starts the gate time (edge count) for the next reading. Because
the same edge is used as a start/stop edge, there is no gap/lag/dead time
between readings in CONTinous mode.
84
and the following paragraphs describe continuous, gap-free
gap-free
'stop' edge of previous reading
is 'start' edge of next reading
Reading #2
Reading #1
stop
2 3 4 5
1 2
start
gate time (1s) gate time (1s)
firmware controlled – will see fluctuations
on the output BNC but readings are continuous (gap free)
53230A continuous, gap-free measurement sequence.
The edge that ends the gate time of the previous reading is the
CONFigure:FREQuency [<expected value>, <resolution>, <channel>]
TRIGger:COUNt 1
SAMPle:COUNt <count>
SENSe:FREQuency:MODE CONTinuous
SENSe:FREQuency:GATE:SOURce TIME
SENSe:FREQuency:GATE:TIME 1
gap-free
...
Reading n
start
1 2 3
5
3 4
...
stop
gate time (1s)
The specified (or default) gate time and the input signal
Keysight 53220A/53230A User's Guide
stop
4 5
subsequent readings based on number
of edges for first reading
gate closed