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SM5 Signal Mixer
SM5SignalMixer
SM5Overview
The SM5 is a three-channel signal mixer. The relative contribution of the three
inputs to the final output can be adjusted using a variable gain for two of the inputs.
In addition, the signal on the two adjustable channels can be inverted before
addition. The input signal range is ± 10 V for each channel, with the additional
caveat that the amplified signal for each channel may not exceed ± 10 V without
clipping. The range for the summed output is ± 10 V.
Power
The SM5 Signal Mixer is powered via the System 3 zBus (ZB1PS). No PC
interface is required.
SM5Features
The SM5 Signal Mixer is a three-channel weighted summer with variable input
weighting and channel inverting. The SM5 is a zBus rack mounted device, through
which it receives power.
Inputs
Three signals input channels (A, B, and C), with a range up to ±10 V peak, are
accessed through front panel BNC connectors. Input channels A and B are multiplied
by a weighted, signed constant, K, before being added to the final output. The
weighting range for these two channels is adjustable from -20 dB to +20 dB (i.e.
|K| = 0.1 to 10) using a GAIN knob on the front panel. The sign of K for
channels A and B can also be selected using front panel toggle switches, labeled
INV-A and INV-B.
If an input is not being used, it should be grounded by attaching a shorted BNC
cable. This will prevent unwanted noise from being added to the output.
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