NF FRA51602, Instruction Manual

Page: 56 / 286

3.2 Input and output connectors
3
-
18
FRA 51602
■ 10 MHz REF IN
If a clock signal is input to this connector, that replaces the internal reference clock of the instrument and
the instrument will operate on the external clock. The accuracy of the measurement frequency is
determined by the accuracy of the clock frequency that is input. Frequency-synchronized measurement
across multiple devices is possible by using a common reference clock.
Input voltage : 0.5 Vp-p to 5 Vp-p
Input waveform : Sinusoidal or square
Input impedance : 300 Ω (nominal), AC coupling
Maximum non- destructive voltage : 10 Vp-p
Signal ground : Isolated from enclosure, ±42 V (DC + ACpk) max.
Connector : Rear panel, BNC connector
！
WARNING
Do not apply voltages that exceed the rated isolation voltage. Doing so may result in
insulation breakdown and risk of electrical shock or damage to the instrument.
1
MΩ
10 MHz
REF IN
EXT REF
CKT
3
3
0
k
Ω
(3
0
0
Ω
)
±
42 V