26 Keysight S5040A Open RAN Studio Player and Capture Appliance User’s Guide
2 Getting Started
The functionality of the four Trigger ports shown in Figure 5 is explained
further.
• Trig 1 — Used for trigger in (TRIG IN), which means it will start playing +
delta, whatever is queued up to be played by U5040B ORAN Studio
software. (Not implemented in the current version).
• Trig 2 — Used to generate trigger output (TRIG OUT) when Player or
Recorder starts ± delta.
• Trig 3 — Used as an input Pulse Per-Second (PPS IN) that can be used
for reference. (Not implemented in the current version).
• Trig 4 — Used as an output Pulse Per-Second (PPS OUT) that can be
used for reference.
Note that the Keysight S5040A Open RAN Studio Player and Capture
Appliances are not rated for Measurement Category II, III, or IV. These
measurement categories have been defined in Table 8.
Table 8 Description of Measurement Category II, III and IV
Measurement Category Description
II Applicable to testing and measuring circuits connected directly to utilization points (socket outlets and similar points) of
the low-voltage mains installation.
Example: Measurements on MAINS CIRCUITS of household appliances, portable tools and similar equipment and on the
consumer side only of socket-outlets in the fixed installation.
III Applicable to test and measuring circuits connection to the distribution part of the building’s low-voltage mains
installation. To avoid risks caused by the hazards arising from these higher short-circuit currents, additional insulation
and other provisions are required.
Example: Measurements on distribution boards (including secondary meters), photovoltaic panels, circuit breakers,
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, equipment for
industrial use and some other equipment such as stationary motors with permanent connection to the fixed installation.
NOTE: For equipment that is part of a fixed installation, the fuse or circuit breaker of the installation can be considered to
provide adequate protection against short-circuit currents.
IV Applicable to test and measuring circuits connected at the source of the building’s low-voltage mains installation. Due to
these high short-circuit currents, which can be followed by a high energy level, measurements made within these
locations are extremely dangerous. Great precautions shall be made to avoid any chance of a short circuit.
Example: Measurements on devices installed before the main fuse or circuit breaker in the building installation.
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