| Specifications apply when the power sensor is operated together with the RF power attenuator supplied. Please refer to the specifications of the R&S NRP18S when operating the power sensor section alone. |
| Rohde and Schwarz NRP18S-25 Specification |
| Frequency range |
|
10 MHz to 18 GHz |
| Impedance matching (SWR) |
10 MHz to 2.4 GHz |
< 1.14 |
| > 2.4 GHz to 8.0 GHz |
< 1.25 |
| > 8.0 GHz to 12.4 GHz |
< 1.30 |
| > 12.4 GHz to 18.0 GHz |
< 1.41 |
| Power measurement range |
continuous average |
30 pW to 30 W (-45 dBm to +45 dBm) |
| burst average |
100 µW to 30 W (-10 dBm to +45 dBm) |
| timeslot/gate average |
100 nW to 30 W (-40 dBm to +45 dBm)1 |
| trace |
600 nW to 30 W (-32 dBm to +45 dBm)2 |
| Maximum power |
average power |
36 W (+45.5 dBm) AVG |
| peak envelope power |
300 W (+55 dBm) for max. 10 µs |
| Measurement subranges |
path 1 |
-45 dBm to +10 dBm |
| path 2 |
-28 dBm to +30 dBm |
| path 3 |
-8 dBm to +45 dBm |
| Transition regions |
with automatic path selection 3 |
(5 ± 2) dBm to (+11 ± 2) dBm
(25 ± 2) dBm to (+31 ± 2) dBm |
| Dynamic response |
video bandwidth |
> 100 kHz (150 kHz) |
( ): +15 °C to +35 °C |
| rise time 10 %/90 % |
< 5 µs (3 µs) |
| Acquisition |
sample rate (continuous) |
2 Msps |
| accuracy of time base |
±5 ppm |
| Triggering |
internal |
| threshold level range |
-12 dBm to +45 dBm |
| threshold level accuracy |
identical to uncertainty for absolute power measurements |
| threshold level hysteresis |
0 dB to 10 dB |
| dropout 4 |
0 s to 10 s |
| external |
EXTernal[1]: R&S ® NRX/NRP2 or R&S ® NRP-Z5 |
| EXTernal2: coaxial trigger I/O |
| slope (external, internal) |
pos./neg. |
| delay |
-5 s to +10 s |
| hold-off |
0 s to 10 s |
| resolution (delay, hold-off, dropout) |
0.5 µs (sample period) |
| source |
INTernal, EXTernal[1], EXTernal2,
IMMediate, BUS, HOLD |
| Zero offset |
initial, without zeroing |
( ): typical at 1 GHz
+15 °C to +35 °C
[ ]: at frequencies
≤ 18 GHz |
| path 1 |
< 100 (20) nW |
| path 2 |
< 4.20 (0.9) µW |
| path 3 |
< 430 (80) µW |
| after external zeroing 5 |
| path 1 |
< 21 (12) nW |
| path 2 |
< 880 (500) nW |
| path 3 |
< 90 (44) µW |
| Zero drift 6 |
path 1 |
< 5.1 (0.8) pW |
| path 2 |
< 210 (35) nW |
| path 3 |
< 22 (3) µW |
| Measurement noise 7 |
path 1 |
< 15 (8) nW |
| path 2 |
< 620 (350) nW |
| path 3 |
< 64 (31) µW |
| Specifications apply to timeslots/gates with a duration of 12.5 % referenced to the signal period (duty cycle 1:8). For other waveforms, the following equation applies: lower measurement limit = lower measurement limit for continuous average mode / √(duty cycle). |
| With a resolution of 256 pixel. |
| Specifications apply to the default transition setting of 0 dB. The transition regions can be shifted by as much as -20 dB using an adequate offset. |
| Time span prior to triggering, where the trigger signal must be entirely below the threshold level in the case of a positive slope and vice versa in the case of a negative slope. |
| Specifications 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). |
| Within one hour after zeroing, permissible temperature change ±1 °C, following a two-hour warm-up of the power sensor. |
| Two 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. |