| Model | Low end frequency limit | High end frequency limit
| Resolution Bandwidth Min.
| Resolution Bandwidth Max.
| Amplitude Range
|
| R3131A | 9 kHz | 3 GHz | 300 Hz | 1 MHz | to +30dBm |
R3132 | 9 kHz | 3 GHz | 1 kHz | 3 MHz | to +30 dBm | R3162 | 9 kHz | 8 GHz | 1 kHz | 3 MHz | to +30 dBm | R3172 | 9 kHz | 27 GHz | 1 kHz | 3 MHz | to +30 dBm | R3182 | 9 kHz | 40 GHz | 1 kHz | 3 MHz | to +30 dBm | R3267 | 100 Hz | 8 GHz | 1000 mHz | 10 MHz | to +30 dBm | R3273 | 100 Hz | 27 GHz | 1000 mHz | 10 MHz | to +30 dBm | R3681 | 20 Hz | 32 GHz | 1000 mHz | 10 MHz | Preamplifier off: +30 dBm to Average display noise level | U3641 | 9 kHz | 3 GHz | 1 kHz | 3 MHz | Min.Single-Side-Band Noise -105 dBc/Hz Max.Single-Side-Band Noise -100 dBc/Hz | U3641 | 9 kHz | 3 GHz | 1 kHz | 3 MHz | to +20 dBm | U3641N | 9 kHz | 3 GHz | 1 kHz | 3 MHz | +130dBmV | U3661 | 9 kHz | 27 GHz | 1 kHz | 3 MHz | to +30 dBm | R3132N | 9 kHz | 3 GHz | 1 kHz | 3 MHz | +134 dBmV |