Using Srs Preamps - Stanford Research Systems SR810 Manual

Rear Panel

USING SRS PREAMPS

When using either the SR550 or SR552, connect the power cable
(standard 9 pin D connectors) from the preamp to the rear panel preamp
connector on the SR810. Use BNC cables to connect the A output from
the preamp to the A input of the SR810. The B output from the preamp
(preamp ground) may be connected to the B input of the SR810. In this
case, use A-B as the input configuration. Be sure to twist the A and B
cables so that there is no differential noise pickup between the cables.
The SR550 and SR552 are AC coupled from 1 Hz to 100 kHz. Set the
SR810 to AC coupled since the signal must be above 1 Hz. The SR550
has an input impedance of 100 MΩ, the SR552 has 100 kΩ.
The SR810 does NOT compensate for the gain of the preamp. The
SR810 sets both preamps to their maximum gains. Measurements made
by the SR810 with a preamp need to be divided by the gain of the
preamp. The SR550 has a gain of 10 and the SR552 has a gain of 100.
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