Getting Started
R&S
®
Cable Rider ZPH
28
User Manual 1321.0950.02 ─ 07
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 external
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 mea-
surement. 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 indicate 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 reference
signal present at the BNC connector, the R&S Cable Rider ZPH displays an appropri-
ate message. Thus, measurements without a valid reference can be avoided.
When the BNC connector is configured as an internal DC bias port, the BNC connector
provides direct current output. Active equipment under test can be supplied with power
via the bias port.
Risk of instrument damage
To avoid damage to the tracking generator output, never apply currents greater than
600 mA or voltages greater than 20 V to the BNC connectors if the BNC connectors
are not configured as BIAS output ports.
If they are configured as BIAS ports, never apply currents greater than 600 mA or vol-
tages greater than 50 V.
Headphone jack
The 3.5 mm connector for headphones has an internal impedance of approximately 10
Ω.
USB type A connector
The USB port provides the USB interface to connect a memory stick and store data
sets or screenshots. It can also be used to control the operation of the external power
sensor.
Instrument Tour
