Description; Operation - Stanford Research Systems SIM914 Operation And Service Manual

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1.1 Description

The SIM914 is a two-channel, 350 MHz bandwidth, DC-coupled,
50 Ω amplifier with a gain of 5 (+14 dB). The two channels may be
cascaded for a gain of 25
for inputs and outputs (see Figure 1.1). A rear panel DB-15 connector
provides power to the unit.
Figure 1.1: The SIM914 front and rear panels.
The full scale input is
typically 5.2 . The output is linear over 1 V and should be
nV/ Hz
terminated into a 50 Ω load. Output rise and fall times are 1.3 ns.
The output will recover from a 10
The unit is protected from 50 V, 1 s input overloads.
The SIM914 is powered by
There are three LEDs on the front panel. The green LED indicates
that power is present. The red LEDs indicate that the output signal
for the corresponding channel is outside its linear range, typically
1.3 VDC. Brief overloads ( 5 ns) trigger a 10 ms flash and will set
the overload status bit in the mainframe.
(+28dB). The unit uses BNC connectors
200 mV. The input noise (above 1 kHz) is
full-scale overload within 3 ns.
5 VDC from the SIM900 Mainframe.
SIM914 350 MHz Preamplifier

Operation