Using Srs Preamps - Stanford Research Systems SR830 Manual

Rear Panel

Using SRS Preamps

When using either the SR550 or SR552, connect the power cable (stan-
dard 9 pin D connectors) from the preamp to the rear panel preamp con-
nector on the SR830. Use BNC cables to connect the A output from the
preamp to the A input of the SR830. The B output from the preamp
(preamp ground) may be connected to the B input of the SR830. 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 SR830 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 SR830 does NOT compensate for the gain of the
preamp.
The SR830 sets both preamps to their maximum gains.
Measurements made by the SR830 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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