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Input bandwidth up to 250 MHz
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x10 Fixed Gain
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50 Ohm input impedance
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±2 V output dynamics
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Drives 50 Ohm loads
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Cascadeable channels
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Rise/fall time <1.5 ns with a 25 mV unipolar input amplitude
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I/O delay <3 ns
The Mod. V975 is an 8 channel fast rise time amplifier housed in a 1-unit VME module; each channel features a fixed voltage gain of 10. Channels are bipolar, non-inverting and can be cascaded in order to obtain larger gain values. Input bandwidth is 250 MHz for signals up to 50 mVpp and decreases for larger ones (up to 110 MHz @ 400 mVpp). 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. 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 |
10 |
|
Rise time |
≤ 1.5 ns (unipolar input, ±25 mV max. amplitude) |
|
Band width |
|
|
Output dynamics |
±2 V |
|
Offset nulling range |
±25 mV (measured with 0 Ohm termination on input) |
|
Max input amplitude |
200 mV |
|
Inputs channels |
8, DC coupled, 50 Ohm ± 2% impedance |
|
Output channels |
8 with Fan-Out of two, drive 50 Ohm load |
|
Noise |
< 50 µV RMS (referred to the input) |
|
Interchannel insulation |
50 dB |
|
VSWR |
< 1.3 |
|
I/O Delay |
< 3 ns |
|
Offset uniformity |
|
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