由其分销商提供的 Rigol PA-DSA875 的描述。
PREAMPLIFIER OPTION, 100KHZ TO 7.5GHZ (ONLY FOR DSA875 OR DSA8375-TG)
RIGOL PA-DSA875 Preamplifier Option, 100 kHz to 7.5 GHz, For DSA875/DSA875-TG RF Spectrum Analyzer
Preamplifier Option 100kHz to 7.5GHz for DSA8 Series
Preamplifier option, 100kHz to 7.5GHz (only for DSA875 or DSA875-TG)As of 4/1/207 this option is included with the purchase of all DSA875 Models(Software Key will be sent via email)