Ничего не подключено. Да - по паспорту шумы должны быть меньше минус 100.
Displayed average noise
level
without preamplifier, RBW = 1 Hz (normalized)
9 kHz to 100 kHz
(models .04/.14/.08/.18
only)
< –108 dBm, –118 dBm (typ.) < –96 dBm, –106 dBm (typ.)
100 kHz to 1 MHz < –115 dBm, –125 dBm (typ.)
1 MHz to 10 MHz < –136 dBm, –144 dBm (typ.)
10 MHz to 2 GHz < –141 dBm, –146 dBm (typ.)
2 GHz to 3.6 GHz < –138 dBm, –143 dBm (typ.)
3.6 GHz to 5 GHz – < –142 dBm, –146 dBm (typ.)
5 GHz to 6.5 GHz – < –140 dBm, –144 dBm (typ.)
6.5 GHz to 13.6 GHz – < –136 dBm, –141 dBm (typ.)
13.6 GHz to 18 GHz – – –
< –134 dBm,
–139 dBm (typ.)
18 GHz to 20 GHz – – –
< –130 dBm,
–135 dBm (typ.)
