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Input bandwidth up to 170 MHz
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x10 adjustable gain with x1 steps
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50 Ω Input Impedance
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±2 V output dynamics
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Drives 50 Ω Loads
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Cascadable Channels
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Rise/fall time <3 ns with a 25 mV unipolar input amplitude
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I/O delay <3 ns
The Mod. V974 is a 4 channel fast rise time amplifier housed in a 1-unit VME module; each channel features a voltage gain adjustable from 1 to 10 in x1 steps. Channels are non-inverting and bipolar: they amplify both positive and negative signals. Input bandwidth is 170 MHz for signals up to 50 mVpp and decreases for larger ones (up to 100 MHz @ 400 mVpp). Gain setting is performed independently for each channel via four rotary handles. Channels can be cascaded in order to obtain larger gain values. Each channel is provided with three LEMO 00 connectors, one for the input and two bridged for the output. The board features a ±2 V output dynamics. 4 screw-trimmers (one per channel) allow the offset calibration which operates over a ±25 mV range. The features include an output short circuit protection.
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Compare
|
Image
|
Name
|
Package
|
No. of Channels
|
Gain
|
Bandwidth (MHz)(1)
|
Coupling
|
Input Impedance (Ω)
|
Output Rise Time (ns)
|
Output Range (V)
|
Equivalent Input Noise (µV RMS)
|
In Conn.
|
Out Conn.
|
|
|
V975 |
VME |
8 |
10 |
250 (gain: 10x) |
DC |
50 |
< 1.5 |
± 2 |
< 50 (gain: 10x) |
LEMO |
LEMO |
|
|
V974 |
VME |
4 |
1 ÷ 10 |
170 (gain: 10x) |
DC |
50 |
< 3 |
± 2 |
< 70 (gain: 10x) |
LEMO |
LEMO |
|
|
N978 |
NIM |
4 |
1 ÷ 10 |
250 (gain: 10x) |
DC |
50 |
< 1.5 |
± 2 |
< 50 (gain: 10x) |
LEMO |
LEMO |
|
|
N979 |
NIM |
16 |
10 (Optional in 2 ÷ 9 range) |
250 (gain: 10x) |
DC |
50 |
< 1.5 |
± 2 |
< 50 (gain: 10x) |
LEMO |
LEMO |
|
|
N979B |
NIM |
16 |
2, 4, 8, 10 |
250 (gain: 10x) |
DC |
50 |
< 1.5 |
± 2 |
< 50 (gain: 10x) |
LEMO |
LEMO |
Technical Specifications
|
Packaging |
1U-wide VME unit |
|
Voltage gain |
0 ÷ 10 |
|
Rise time |
< 3 ns (unipolar input, ±25 mV max. amplitude) |
|
Bandwidth |
|
|
Output dynamic range |
±2 V |
|
Max input amplitude |
200 mV |
|
Offset nulling range |
±25 mV (measured with 0 Ω termination on input) |
|
Inputs channels |
4, DC coupled, 50 Ω ± 2% impedance |
|
Output channels |
4 with Fan-Out of two, drive 50 Ω load |
|
Noise |
< 70 µV RMS (referred to the input) |
|
Interchannel insulation |
40 dB |
|
Input reflection |
< 10% |
|
I/O Delay |
< 3 ns |
|
Offset uniformity |
|
|
NOTE |
Specifications measured with gain = 10 |
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