... | @@ -54,7 +54,9 @@ system. |
... | @@ -54,7 +54,9 @@ system. |
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A: 0 dBm is fine for the logic inside the switch. It is better an higher
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A: 0 dBm is fine for the logic inside the switch. It is better an higher
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voltage if you have a sine wave due to better slew rate (noise
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voltage if you have a sine wave due to better slew rate (noise
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immunity). We used about 10 dBm sine wave with excellent results.
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immunity). We used about 10 dBm sine wave with excellent results. The
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input is terminated with a 50 Ohm, 1% resistor.
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10 MHz Input power:
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- 10 MHz Input Minimum input power: 0 dBm (600 mVpp)
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- 10 MHz Input Minimum input power: 0 dBm (600 mVpp)
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- 10 MHz Input Recommended input power: 3 dBm - 15 dBm
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- 10 MHz Input Recommended input power: 3 dBm - 15 dBm
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... | @@ -65,13 +67,18 @@ Rizzi |
... | @@ -65,13 +67,18 @@ Rizzi |
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### Q: What is the required input level for the PPS input on the WRS as a grandmaster?
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### Q: What is the required input level for the PPS input on the WRS as a grandmaster?
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A: The input is terminated with a 50 Ohm, 1% resistor. The following are
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A: The input is *not* terminated with a 50 Ohm resistor; it has around 5
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the PPS input levels:
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kOhm input impedance.
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PPS input levels:
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- PPS Input Minimum: 2.1V (on a 50-ohm load)
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- PPS Input Minimum: 2.1V (on a 50-ohm load)
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- PPS Input Recommended: 2.5V-5V (on a 50-ohm load)
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- PPS Input Recommended: 2.5V-5V (on a 50-ohm load)
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- PPS Input Absolute Maximum: 7 V (on a 50-ohm load)
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- PPS Input Absolute Maximum: 7 V (on a 50-ohm load)
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(Note that the SCB v3.3 has no 50 ohm termination. The SCB v3.4 has a 50
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ohm termination that can be switched in with the appropriate gateware.
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However, this gateware is *not* implemented (10 March 2017))
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Author: Mattia
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Author: Mattia
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Rizzi
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Rizzi
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