Instrument Tour
R&S
®
Cable Rider ZPH
22
Getting Started 1321.0944.02 ─ 06
For model .12, the RF input allows a maximum power of 20 dBm (or 100 mW) at
the RF input port. The R&S Cable Rider ZPH may be loaded with up to 30 dBm
(or 1W) for up to three minutes. If you apply 1 W for a longer period, the R&S
Cable Rider ZPH maybe destroyed. The RF input is protected from static dis-
charges and voltage pulses by a limiting circuit. Connect a cable or DUT to the
RF input with an N-type connector. Use a cable to connect the DUT to the R&S
Cable Rider ZPH, if necessary.
Risk of electrical shock
To avoid electrical shock, the DC input voltage must never exceed the value
specified on the housing.
Risk of instrument damage
To avoid damage to the coupling capacitor, input attenuator or the mixer,
the DC input voltage must never exceed the value specified in the data
sheet.
BNC connector
You can connect the BNC connector for various applications. It supports an exter-
nal trigger signal or an external reference signal. It can also be configured as a
BIAS port.
When the BNC connector is configured as a trigger input, it controls the start of a
measurement. The trigger mode is selected in the SWEEP menu. The trigger
threshold is similar to that of TTL signals.
When the BNC connector is configured as reference input, you can apply a 10
MHz external reference signal to it for frequency synchronization. The external
reference label
is displayed at the top right corner of the trace window to indi-
cate that the reference signal is supplied via external signal input. The label turns
green when the reference signal is detected.
The level of the reference signal must be larger than 0 dBm. If there is no refer-
ence signal present at the BNC connector, the R&S Cable Rider ZPH displays an
appropriate message. Thus, measurements without a valid reference can be avoi-
ded.
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