Keysight U8903B, Service Manual

Page: 111 / 165

Appendix A A
Keysight U8903B Service Guide 111
Test record for frequency accuracy verification
Test record for phase accuracy verification
NOTE
Use the test record below for the remaining test channels 3 and 4, channels 5 and 6, and
channels 7 and 8.
Table A-10 Test record for frequency accuracy verification
f
DUT
(Hz)
Gate time (s)
U8903B
Sample Size
f
FC
(Hz)
(Channel 1)
f
Meas
(Hz)
(Channel 1)
f
FC
(Hz)
(Channel 2)
f
Meas
(Hz)
(Channel 2)
Frequency
accuracy (ppm)
(Channel 1)
Frequency
accuracy (ppm)
(Channel 2)
10 10 262144
20 10 262144
50 5 262144
100 5 131072
500 0.5 131072
1000 0.5 131072
5000 0.5 131072
10000 0.5 131072
50000 0.5 131072
80000 0.5 131072
90000 0.5 131072
NOTE
Use the test record below for the remaining test channels 3 and 4, channels 5 and 6, and
channels 7 and 8.
Table A-11 Test record for phase accuracy verification
f
IN
(Hz)
Phase accuracy (
°
)
10
50
100