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specgather.md

@@ -24,7 +24,8 @@ external oscillator that the metrology users need.
 
 \* Other possible user for 1 GSPS ADC cards requiring HPC FMC? Needs to
 be worked out as fast ADCs nowadays use many serial links and have no
-parallel readout.
+parallel readout. With FPGA with 8 GTX, only a single GTX is available
+for FMC connector.
 
 \* Quantity: 100 in 5 years for metrology and research needing high
 timing performance.
@@ -140,6 +141,9 @@ alternative.
 
   - [Xilinx SoC
     portfolio](https://www.xilinx.com/products/silicon-devices/soc.html)
+  - [Zynq-7000 All Programmable SoC Family Product Tables and Product
+    Selection
+    Guide](https://www.xilinx.com/support/documentation/selection-guides/zynq-7000-product-selection-guide.pdf)
 
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