NF ZA57630, Instruction Manual

Page: 48 / 246

3.2 Input and Output Connectors
3
-
12
ZA 57630
Output voltage setting is a voltage at no load (open load). When a 600 Ω load is connected, a
voltage that is half of the set value is output.
■ Connectors when power is off
When the power is off, the relay is also off and the output amplifier is separated from the
DC
BIAS OUT
connector on the rear panel. The output impedance is 600 Ω even in this state.
However, when the power is turned on or off, the output impedance will become temporarily
unstable.
！
CAUTION
Applying an external signal to the DC BIAS OUT connector will damage the internal circuits.
Never apply a signal.
3.2.5 10 MHz REF IN
If a clock signal is input to this connector, it replaces the internal reference clock of this
instrument and this instrument will operate using the external clock. The accuracy of the
measurement frequency is determined by the accuracy of the clock frequency that is input.
Furthermore, frequency-synchronized measurement across multiple instruments is possible
by using a common reference clock.
■ Signal specifications
Input voltage : 0.5 Vp-p to 5 Vp-p
Input waveform : Sinusoidal or square
Input impedance : 300 Ω (nominal value), AC coupling
Maximum non-destructive input voltage : 10 Vp-p
Signal grounding : Isolated from the enclosure, max. 42 Vpk (DC + ACpk)
Connector : Rear panel, BNC connector
Figure 3-7 Function of 10 MHz REF IN Connector
！
WARNING
Do not apply a voltage exceeding the rated isolation voltage. Doing so may result in insulation
breakdown and risk of electrical shock or damage to this instrument.
1
MΩ
10 MHz
REF IN
EXT REF
CKT
47
0 k
Ω
(3
00
Ω)
±42 V