Stanford Research Systems SR844 User Manual page 68

3-10 Signal Input
Sig Z-In
Wide HIGH
Reserve
1 µV
+20 dB
300 nV +20 dB
100 nV +20 dB
SR844 RF Lock-In Amplifier
50 Ω Ω Ω Ω
NORMAL LOW NOISE
+20 dB +20 dB
+20 dB +20 dB
+20 dB +20 dB
1 MΩ Ω Ω Ω
HIGH NORMAL
+20 dB +20 dB
+20 dB +20 dB
+20 dB +20 dB
LOW NOISE
+20 dB
+20 dB
+20 dB