The GFT614 module is specially designed for distribution of high frequency clock and high-speed logic signal to multiple devices via long cable. All outputs with 50 Ω load can drive 100 feet of cable at clock rate greater than 200 MHz with 2.5 V amplitude.
The channel input threshold can be set to +1 or 0 or -1 V and the input load can be selected from 50 Ω or 1 KΩ pull up by a front panel switch. So that channel input can be driven directly by TTL / CMOS logic levels or open collector or negative pulse (0 to -3 V) or AC coupled signal (± 0.5 V).
All outputs with 50 Ω load can drive 100 feet of cable at clock rate greater than 150 MHz with 2.5 V amplitude. Each output polarity can be set normal or inverted and outputs are compatible with DC or AC TTL input.
A gate input allows to disable the module by external signal.
The GFT614 is a compact module supplied with a +5 V AC/DC adapter.
Overview
- Up to 150 MHz clock rate
- Drive 100 feet of cable at 150 MHz
- Four synchronized 50 Ω TTL outputs
- 1 ns typical output rise & fall time
- Selectable polarity
- 2 ps input to output RMS jitter
- One input with:
- Selectable threshold (+1 V / 0 V / -1 V)
- Selectable load 50 Ω or 1 kΩ pull up
- Active low Gate input
- Operate from DC +5 V
- All input & output are BNC connectors
- Compact module: 115 X 103 x 37 mm
- Option: 4 individual 50 Ω TTL line drivers
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Specifications
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Input |
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Range |
+5 V to -5 V |
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Threshold level |
+1 V or 0 V or -1 V (selectable at rear panel) |
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Internal load |
50 Ω or 1 kΩ pulled to +5 V (selectable at front panel) |
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Minimum pulse width |
5 ns |
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Output |
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Number |
4 |
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Output resistance |
50 Ω |
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Low level |
0.25 V |
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High level |
2.5 V @ Load=50 Ω, 4 V @ Load > 10 kΩ |
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Polarity from input |
Normal or inverted |
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Rise /fall times |
1 ns / 1 ns @ 100 MHz square wave |
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Jitter RMS |
2 ps (input to output) |
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Max clock frequency |
150 MHz @ cable length = 3 feet |
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150 MHz @ cable length = 100 feet |
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Skew |
500 ps (TBC) |
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Gate |
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Low Level |
< 0.5 V |
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High level |
2.4 V |
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Rate |
50 MHz |
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General specifications |
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Control |
Switches to select:
Power on indicator |
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Inputs & outputs |
All are BNC connectors |
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Size |
W = 115, L = 103, H = 30 mm |
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Mounting flange |
included |
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Power V/A |
+5 V / 200 mA max. External AC (90 -240 V) to DC (+ 5 V) adapter furnished |
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Power connector |
Jack 2.10 mm |
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Option: |
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GFT644 module |
4 individual 50 Ω TTL line drivers |
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