1 MHz to 102.4 KHz range
>100 dB dynamic reserve
0.001 degree phase resolution
Time constants from 10 µs to 30 ks (up to 24 dB/oct rolloff)
Auto-gain, -phase, -reserve and -offset
Data logging (up to 65k samples)
Smoothing, curve fitting & statistics
GPIB & RS-232
https://www.thinksrs.com/products/sr850.html