Measurement Basics
R&S
®
FSW-K7
29
User Manual 1173.9240.02 ─ 17
4.3 Sample Rate, Measurement Time and Trigger Offset
The maximum demodulation bandwidths that can be obtained during the measure-
ment, depending on the sample rate, are listed in the tables below for different demod-
ulation filter types. The allowed value range of the measurement time and trigger offset
depends on the selected demodulation bandwidth and demodulation filter. If the AF fil-
ter or the AF trigger are not active, the measurement time increases by 20
%.
A maximum of 24 million samples can now be captured, assuming sufficient memory is
available; thus the new maximum measurement time has also increased, according to
the following formula:
Meas.time
max
= Sample count
max
/ sample rate
The minimum trigger offset is (-Meas.time
max
)
Table 4-1: Sample Rate, Measurement Time and Trigger Offset using a flat demodulation filter
Demod. band-
width
Sample rate
Measurement time
Trigger offset
Min.
Max.
Min.
Max.
500 MHz
6)
600 MHz
1.66 ns
40 ms
-40 ms
0.3495 s
320 MHz
5)
400 MHz
2.5 ns
60 ms
-60 ms
0.5243 s
160 MHz
4)
200 MHz
5 ns
120 ms
-120 ms
1.0486 s
80 MHz
3)
128 MHz
7.8125 ns
187.5 ms
-187.5 ms
1.6384 s
40 MHz
2)
64 MHz
15.625 ns
375 ms
-375 ms
3.2768 s
28 MHz
1)
64 MHz
15.625 ns
375 ms
-375 ms
3.2768 s
18 MHz
32 MHz
31.25 ns
750 ms
-750 ms
6.5536 s
10 MHz
32 MHz
31.25 ns
750 ms
-750 ms
6.5536 s
8 MHz
16 MHz
62.5 ns
1.5 ms
-1.5 ms
13.1072 s
5 MHz
8 MHz
125 ns
3 ms
-3 ms
26.2144 s
3 MHz
4 MHz
250 ns
6 ms
-6 ms
52.4288 s
1.6 MHz
2 MHz
500 ns
12 ms
-12 ms
104.8576 s
800 kHz
1 MHz
1
µ
s
24 ms
-24 ms
209.7152 s
400 kHz
500 kHz
2
µ
s
48 ms
-48 ms
419.4304 s
200 kHz
250 kHz
4
µ
s
96 s
-96 s
838.8608 s
100 kHz
125 kHz
8
µ
s
192 s
-192 s
1677.7216 s
50 kHz
62.5 kHz
16
µ
s
384 s
-384 s
3355.4432 s
25 kHz
31.25 kHz
32
µ
s
768 s
-768 s
6710.8864 s
12.5 kHz
15.625 kHz
64
µ
s
1536 s
-1536 s
13421.7728 s
6.4 kHz
7.8125 kHz
128
µ
s
3072 s
-3072 s
26843.5456 s
Sample Rate, Measurement Time and Trigger Offset
