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| − | The CW503 provides a handy power supply for both the differential probe and the LNA. Multiple probes can be connected to a single power supply. The following shows the internal block diagram of the CW503 probe power supply:
| + | == Page Moved == |
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| − | [[File:blockdiagram.png|image]] | + | See [https://rtfm.newae.com/Tools/CW503%20Probe%20Power%20Supply/ NewAE RTFM Page]. The previous content on this wiki has been moved to the above link. See wiki history if you would like to view exact older versions of this page. |
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| − | The use of isolated DC-DC converters allows you to use connected probes without worry about ground loops. Note the probe is ''not designed'' for use at high isolation voltages (>30V).
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| − | The power supply uses a micro-USB jack, allowing you to power the probe from front-pane USB ports on some instruments (be careful of current limits if using this method):
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| − | [[File:diffprobe-psu.jpg|400px|image]]
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| − | Alternatively the probe comes with a high-quality 5.0V wall-wart adapter, which has been selected for minimum noise input to the CW503.
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| − | == Front-Panel Connections ==
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| − | The following can be found on the front panel of the device:
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| − | <ul>
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| − | <li><p>Power Good LEDs:</p>
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| − | <blockquote><p>The probe PSU monitors the +7.8V, -7.8V, and +3.3V outputs. If these outputs fall below the required setpoints the LEDs extinguish. This is normally due to excessive current draw or a short on one of the output lines.</p></blockquote></li>
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| − | <li><p>6-Pin Probe PSU Connectors:</p>
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| − | <blockquote><p>This probe supply connectors use the same pinout as our Low Noise Amplifier (CW502) and Differential Probe (CW501). The pinout is as follows:</p>
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| − | {|
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| − | ! Pin
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| − | ! Name
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| − | |-
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| − | | 1
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| − | | +7.8V Out
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| − | |-
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| − | | 2
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| − | | GND
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| − | |-
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| − | | 3
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| − | | Aux Out
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| − | |-
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| − | | 4
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| − | | +3.3V Out
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| − | |-
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| − | | 5
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| − | | -7.8V Out
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| − | |-
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| − | | 6
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| − | | GND
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| − | |}
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| − | </blockquote></li>
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| − | <li><p>PROBE-GND Pin Header:</p>
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| − | <blockquote><p>This pin header connects to the GND pins on the 6-pin connector.</p></blockquote></li>
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| − | <li><p>AUX-IN Pin Header:</p>
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| − | <blockquote><p>This pin header connects to the "Aux Out" pin on the 6-pin connector.</p></blockquote></li>
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| − | <li><p>USB-GND Pin Header:</p>
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| − | <blockquote><p>This pin header connects to the USB negative (ground). You can connect this to the PROBE-GND to remove the isolation, or use a resistor if you want to reduce voltage differential without directly connecting them.</p></blockquote></li></ul>
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| − | {{Template:Hardware}}
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