| Rohde and Schwarz NRP-Z37 Specification |
| Frequency range |
R&S NRP-Z37 |
DC to 26.5 GHz |
| Impedance matching (SWR) |
RF input |
| DC to 2.0 GHz |
< 1.15 |
| > 2.0 GHz to 4.2 GHz |
< 1.18 |
| > 4.2 GHz to 8.0 GHz |
< 1.23 |
| > 8.0 GHz to 12.4 GHz |
< 1.25 |
| > 12.4 GHz to 18.0 GHz |
< 1.35 |
| > 18.0 GHz to 26.5 GHz |
< 1.45 |
| RF output |
| DC to 8.0 GHz |
< 1.6 |
| > 8.0 GHz to 26.5 GHz |
< 2.0 |
| Power measurement range |
|
4 µW to 400 mW (–24 dBm to +26 dBm), continuous, in a single range |
| Max. power |
average power |
0.5 W (+27 dBm), continuous
1.0 W (+30 dBm) for max. 10 minutes |
| peak envelope power |
30 W (45 dBm) for max. 1 µs |
| Acquisition |
sample rate |
20.833 kHz (sigma-delta) |
| Zero offset |
after external zeroing 6, 7 |
< 400 nW (typically 200 nW at 1 GHz) |
| Zero drift 8 |
|
< 160 nW |
| Measurement noise 9 |
|
< 240 nW (typically 120 nW at 1 GHz) |
| Uncertainty for absolute power measurements 38 |
|
+20 °C to +25 °C |
+15 °C to +35 °C |
0 °C to +50 °C |
| with matched load on RF output (SWR < 1.05) |
| DC to < 100 MHz |
0.070 dB |
0.077 dB |
0.103 dB |
| 100 MHz to 4.2 GHz |
0.075 dB |
0.082 dB |
0.106 dB |
| > 4.2 GHz to 8.0 GHz |
0.087 dB |
0.094 dB |
0.119 dB |
| > 8.0 GHz to 12.4 GHz |
0.093 dB |
0.101 dB |
0.130 dB |
| > 12.4 GHz to 18.0 GHz |
0.112 dB |
0.121 dB |
0.151 dB |
| > 18.0 GHz to 26.5 GHz |
0.122 dB |
0.137 dB |
0.190 dB |
| with R&S FSMR26 connected to RF output |
| DC to < 100 MHz |
0.104 dB |
0.109 dB |
0.128 dB |
| 100 MHz to 4.2 GHz |
0.116 dB |
0.120 dB |
0.138 dB |
| > 4.2 GHz to 8.0 GHz |
0.163 dB |
0.166 dB |
0.181 dB |
| > 8.0 GHz to 18.0 GHz |
0.183 dB |
0.187 dB |
0.207 dB |
| > 18.0 GHz to 26.5.0 GHz |
0.226 dB |
0.235 dB |
0.269 dB |
| with R&S FSMR26 connected to RF output and activated load interference correction |
| DC to < 100 MHz |
0.067 dB |
0.074 dB |
0.101 dB |
| 100 MHz to 4.2 GHz |
0.077 dB |
0.083 dB |
0.107 dB |
| > 4.2 GHz to 8.0 GHz |
0.092 dB |
0.099 dB |
0.123 dB |
| > 8.0 GHz to 12.4 GHz |
0.099 dB |
0.107 dB |
0.135 dB |
| > 12.4 GHz to 18.0 GHz |
0.122 dB |
0.130 dB |
0.159 dB |
| > 18.0 GHz to 26.5 GHz |
0.154 dB |
0.167 dB |
0.212 dB |
| Uncertainty for relative power measurements 39 |
|
0.032 dB |
| 6Specifications expressed as an expanded uncertainty with a confidence level of 95 % (two standard deviations). For calculating zero offsets at higher confidence levels, use the properties of the normal distribution (e.g. 99.7 % confidence level for three standard deviations). |
| 7Specifications apply to zeroing with a duration of 4 s. Zeroing for more than 4 s lowers uncertainty correspondingly (half values for 16 s). |
| 8Within one hour after zeroing, permissible temperature change ±1 °C, following a two-hour warm-up of the power sensor. |
| 9Two standard deviations at 10.24 s integration time in continuous average mode, with aperture time set to default value. The integration time is defined as the total time used for signal acquisition, i.e. the product of twice the aperture time and the averaging number. Multiplying the noise specifications by √(10.24 s/integration time) yields the noise contribution at other integration times. Using a von Hann window function increases noise by a factor of 1.22. |
| 38Expanded uncertainty (k = 2) for absolute power measurements up to 100 mW (+20 dBm) at the calibration frequencies (see endnote 40). Specifications include calibration uncertainty, linearity, temperature effect and interference from the wave reflected by the load on the RF output. Zero offset, zero drift and measurement noise must additionally be taken into account when measuring low powers. If the measured power exceeds 100 mW, the power coefficient of the integrated power splitter must be taken into account (see endnote 43). As a rule of thumb, the contribution of zero offset can be neglected for power levels above –7 dBm if external zeroing has been applied. The contribution of measurement noise can be neglected below 0.01 dB. |