Anritsu MS8608A, Руководство по эксплуатации, Страница: 137 / 338

6-25
Section 6 Performance Tests
Frequency measurement accuracy
Set the marker point to the position at least 20 dB higher than the noise (or adjacent
interference signal) to operate the built-in counter with the higher-S/N signal, and test
the frequency measurement accuracy using Count On mode.
(1) Specifications
When S/N
≥
20 dB, RBW
≤
3 MHz
• Resolution: 1 Hz, 10 Hz, 100 Hz, 1 kHz
• Accuracy:
≤
(Readout frequency
×
reference oscillator accuracy
±
(1 count)
±
2 Hz)
(2) Test instrument
• Signal generator: 69269A
• Frequency standard
(3) Setup
A n r i t su
M S8608A
10 MHz Ref Input RF Output
Output
500 MHz
RF Input
Output
69269A
Coaxial adaptor
(N-P • SMA-J)
Coaxial cable
(SMA connector)
Synthesized signal
generator
Frequency standard
(stability should be 3
×
10
–14
/day or
less, and traceable to national standards)
Frequency Measurement Accuracy Test