Scaling Problem in Old HMC7044 GUI

The HMC704X_GUI Evaluation Software might not work with modern high-resolution displays. It does not use automatic scaling to resize the graphics and checkboxes, which means that they might be unreadable on high-resolution computers. To overcome this problem, users can follow the steps below. Right Click to .exe and open properties On the compatibility tap, Click Change High DPI Settings. Check Override High DPI Scaling Behavior. Select Scaling performed by the System.

HMC7044 RFSYNC in DC coupled LVDS

Original Question: HMC7044 RFSYNC in DC coupled LVDS by Jawad Hello, I am looking to synchronize 2 HMC7044 boards by doing the following connections in LVDS between boards: - OSCOUT0 of the first board --- TO --> CLKIN1/FIN of the second board - SCLK of the first board --- TO --> RFSYNC of the second board Both connections are in LVDS: - for the OSCOUT TO FIN we are implementing an AC coupled termination (i.e., inline caps) as we are dealing with a real clock - for the SCLK TO RFSYNC connection we are intending to implement a DC coupled termination (without inline caps) because we intend to use the one-shot strobe logic for the RFSYNC and not a clock so that's why we avoid inline caps as they may block our single shot strobe. Kindly I have the following questions: - Can we use the DC coupled logic on the SCLK TO RFSYNC LVDS pair? - If DC coupling is OKay do we need an external 100 ohm resistor ? - If DC coupling is NOK then we need to use a single ended CMOS signal or there is a way to send differential lines between HMCs? Regards. Verified Answer: RE: HMC7044 RFSYNC in DC coupled LVDS by emrecangidik Hi Jawad, If you are interfacing HMC7044 output to another HMC7044, you don't need to place Y termination network. Input termination network can handle the termination. By selection LVPECL input termination via SPI, you are activation 50ohm Y termination network in front of the input buffer. Thanks, Emrecan Question: RE: HMC7044 RFSYNC in DC coupled LVDS by emrecangidik Hi Jawad, LVDS driver mode of the HMC7044 cannot keep logic 0 levels at idle state. LVPECL driver mode performance is much better for pulse generation mode. I recommend below level translator circuit for DC Coupling pulse operations from LVDS operations. However, the RFSYNC input of HMC7044 has the option to support LVPECL signals (Reg0x0B[3]). So you don't need to put a level translator circuit between two HMC7044. You can build this circuit (given in Typical application circuits section of the datasheet) to interface to HMC7044. Thanks, Emrecan Question: RE: HMC7044 RFSYNC in DC coupled LVDS by Jawad Thank you for your reply. What I understand from your reply is to use the LVPECL instead of the LVDS. Knowing that the single pulse RFSYNC receiver is also an HMC7044, do I still need to put the 50 ohm Y pull-down resistors on the transmitter side or by activating the LVPECL mode on the HMC7044 receiver side and the Y termination network it will work so no need to add additional 3 resistors? What I know in general for LVPECL is better to put the pull-downs near the transmitter to shorten the current path between the transmitter transistors and the GND. Regards.

Differences between HMC7044 and the new HMC7044B?

Original Question: Differences between HMC7044 and the new HMC7044B? by thb Dear Madam or Sir, It appears that a new version of the HMC7044, called the HMC7044B, is now available. Could you please clarify the differences between the HMC7044 and the HMC7044B? Additionally, can the HMC7044B be considered a drop-in replacement for the previous HMC7044? Best regards, Verified Answer: RE: Differences between HMC7044 and the new HMC7044B? by emrecangidik Hi, It is discovered that HMC7044 has some ppm synchronization error under certain cold die temperatures and low supply voltage conditions. This synchronization error occurs in temperatures lower than -10 ℃ and supply voltage lower than nominal values. This synchronization error results from the pulse generation mechanism. This synchronization problem doesn’t occur when continuous SYSREF or CLK is used. HMC7044B is the revised version designed to overcome this synchronization problem in the pulse generation mechanism. There is no difference between HMC7044 and HMC7044B in terms of Fit, Form, Function, and Software. Even though there is no difference between HMC7044 and HMC7044B functionality-wise, We recommend HMC7044B for new designs. If you want to swap HMC7044 in your system with HMC7044B, there is no need for software and hardware changes. You can move on with just a BOM change. If you would like to differentiate two parts, HMC7044B has an option for product ID change. Thanks, Emrecan