Adalm-Pluto Rev D
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I developed the Pluto C/D into a compact TRX together with the LeoBodnar MiniGPSDO and the 20W SG Lab PA. The Pluto is externally clocked at 50MHz. A detailed description with links to curcuit diagrams can be found on qrz.com and on my HP https://www.dj7th.de under "Projects".
Ich habe den Pluto C/D zusammen mit dem LeoBodnar MiniGPSDO und der 20W SG Lab PA zu einem kompaktenTRX entwickelt. Eine ausführliche Beschreibung mit Links zu Schaltplänen findet man auf qrz.com und auf meiner HP https://www.dj7th.de unter "Projekte".
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I equipped my rev.C. pluto with a similar, more simple circuit.
OS commands for switching between external and internal clock work only if the rev. resistor is modified accordingly.
Can you give more details about your circuit ?
Thank you.
73,
YO8SEP
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I simply use a AS169-73 (RF switch). Inputs connected to internal TCXO and a added SMA connector, output connected via 47pF to AD9363ABCZ xtalin input. Appropriate control signals generated from PS_GPIO6 for the AS169 and the TCXO enable (off while external).
Important to add 20k in parallel to R91!!! This lets the (original) FW think it is a rev. D HW and the ext clock commands will work:
Code
Display More// this enables the internal TCXO fw_setenv refclk_source internal // this enables the external CLK in fw_setenv refclk_source external // set different ref. clocks fw_setenv ad936x_ext_refclk '<40000000>' fw_setenv ad936x_ext_refclk_override '<40000000>' fw_setenv ad936x_ext_refclk '<45000000>' fw_setenv ad936x_ext_refclk_override '<45000000>' fw_setenv ad936x_ext_refclk '<25000000>' fw_setenv ad936x_ext_refclk_override '<25000000>' fw_setenv ad936x_ext_refclk '<40000000>' fw_setenv ad936x_ext_refclk_override '<40000000>' fw_setenv ad936x_ext_refclk '<50000000>' fw_setenv ad936x_ext_refclk_override '<50000000>' // ... reboot to take affect reboot
