TEST & MEASUREMENT FLYING HIGH
Stefan Stahuber, product manager at Rohde & Schwarz presents a two-port handheld vector network analyser up to 26.5GHz, that features S-parameter measurements
connector types at the input and output. All classic one-port measurements on antennas and cables, such as distance-to- fault (DTF) measurements, are also supported.
Lightweight design, heavyweight performance
Figure 1: Convenient configuration and visualisation of S-parameters
he Rohde & Schwarz product portfolio previously included the R&S ZPH (up to 4GHz) and the R&S ZVH (up to 8GHz) for field work at RF transmitter and receiver sites. Now a third model has been added. The R&S ZNH extends the measurable frequency range up to 26.5GHz.
T
Measurements on radar, microwave and satellite systems, whether stationary or installed on ships or vehicles, are part of the standard repertoire of the new handheld. Thanks to its RF performance, including a dynamic range of typically 100dB, output power up to 0dBm and a spurious level as low as 0.0025dB RMS, the analyser is also a good choice for various tasks in development, production and service. The R&S ZNH is the first two-port vector network analyser in the Rohde & Schwarz handheld VNA series. Featuring a four- receiver architecture, it measures all four S-parameters, plus it supports advanced calibration methods such as UOSM (unknown through, open, short, match), a useful feature when measuring DUTs with a mix of
For efficient mobile use, instruments must be easy to handle and quick to configure. The R&S ZNH is housed in the same compact case as the other members of its family and shares their proven user interface, with a combination of hardkeys and a gesture enabled 7" capacitive touchscreen. A measurement wizard helps even inexperienced users make the right settings, which can be combined to create automated, standardised test sequences. Remote control capability is a key aspect for field use. Not every qualified engineer is a qualified climber. Sometimes an engineer on the ground must guide an assistant on the tower through the measurements. The R&S ZNH does away with such workarounds. When connected to a (mobile) WLAN router, the instrument can be operated on a tablet just like on the instrument itself.
Custom configuration On-site testing usually involves not only antennas and cables, but also filters, splitters and amplifiers. The R&S ZNH has all it takes to perform these measurements. Capabilities beyond the standard two-port VNA configuration can be ordered separately and enabled via keycode:
• Support of terminating, directional and optical power sensors, which can be used to test transmit power and matching as well as the optical signal feed to a base station’s common public radio interface (CPRI). • Pulse measurement option for detailed analyses on radar and microwave systems.
Figure 2: The quad display shows all S-parameters simultaneously
66 MAY 2021 | ELECTRONICS TODAY
• Tower mounted amplifiers (TMA) are usually powered through the RF cable – a task that can be handled by the R&S ZNH. • A vector voltmeter displays the amplitude and phase for a fixed frequency – a measurement function that is useful, for example, when working on phased array antennas. The required signal source and VSWR bridge are available in the R&S ZNH.
Figure 3: The cable measurement functions include distance-to-fault (DTF) measurements
Figure 4: The pulse measurement option checks the pulse characteristics and output power of radar transmitters
• The four phase coherent receivers of the R&S ZNH cannot only perform S-parameter measurements. In addition, the wave quantities and arbitrary ratios of wave quantities can be measured and saved in two parameter sets. Based on this functionality, the R&S ZNH can be used, for example, as a frequency selective power meter or to align two RF channels of a phased array antenna in amplitude and phase.
The R&S ZNH greatly simplifies installation and maintenance of antenna systems up into the microwave range. As an all-rounder in the lab, the handheld instrument can in many cases replace a stationary network analyser.
Rohde & Schwarz
www.rohde-schwarz.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74
