Semtech EB-GS12190 Evaluation Board User guide

Brand
Semtech
Model
EB-GS12190 Evaluation Board
Type
User guide
EB-GS12190 Evaluation Board
User Guide
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Semtech
Proprietary & Confidential
GS12190
User Guide Rev.2
PDS-062008 July 2020
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GS12190
User Guide Rev.2
PDS-062008 July 2020
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Proprietary & Confidential
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Revision History
Contents
1. Hardware User Guide .....................................................................................................................................4
1.1 System Block Diagram ......................................................................................................................4
1.2 Quick Start Guide ................................................................................................................................4
1.2.1 Start-up Sequence .................................................................................................................4
1.3 Configuration 1 — Cable EQ Mode ..............................................................................................7
1.4 Configuration 2 — Cable Driver Mode .......................................................................................8
1.5 Configuration 3 — Output Balanced Mode ..............................................................................9
2. Software User Guide.................................................................................................................................... 10
2.1 Installing the GS12190 Software GUI ....................................................................................... 10
2.2 GUI Operation ................................................................................................................................... 14
2.2.1 Getting Started..................................................................................................................... 14
2.2.2 Device Settings Tab............................................................................................................ 15
2.2.3 Main Tab ................................................................................................................................. 16
2.3 Additional GUI Features ................................................................................................................ 18
2.3.1 Additional Features Tab.................................................................................................... 18
2.3.2 PRBS Tab................................................................................................................................. 19
2.3.3 Eye Monitor ........................................................................................................................... 21
3. Schematics ...................................................................................................................................................... 24
4. Board Layout .................................................................................................................................................. 27
5. Bill of Materials............................................................................................................................................... 29
Version ECO Date Changes and/or Modifications
2 052884 July 2020
Changes made to Figure 2-1, Figure 2-2,
Figure 2-3, Figure 2-4, Figure 2-5, Figure 2-6,
Figure 2-7, Section 2.2.2, Figure 2-9, Table 5-1.
Changes to Section 2.2.2.
1 051925 July 2020
Changes made to Figure A, Section 1.2.1,
Table 1-2, Figure 1-2, Section 1.3, Section 1.4,
Section 1.5, Figure 2-1, Figure 2-2, Figure 2-3,
Figure 2-4, Figure 2-5, Figure 2-6, Figure 2-7,
Section 2.2.2, Figure 2-9, Table 5-1. Added to
Section 2.2.2.
0 047176 June 2019 New document.
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General Description
This document provides guidance on how to use the GS12190 Evaluation Board
(EB-GS12190). It is recommended that the GS12190 Data Sheet (PDS-061916) is read
prior to reading this document in order to get familiar with the features of the GS12190.
Overview
The EB-GS12190 can be powered-up and evaluated out-of-the-box as a standalone kit
without GUI control. Connecting to a PC (using the supplied USB cable) enables
evaluation of the advanced features which are only accessible through the host
interface.
For a quick evaluation, refer to the Quick Start Guide section of this document.
For detailed descriptions of the supported evaluation features of the EBK, refer to the
GS12190 Data Sheet.
Kit Contents
The EBK-GS12190 contains the following components:
• EB-GS12190 board
• USB Cable (for GUI communication)
• 5V power supply
Figure A: EB-GS12190 Inputs, Outputs and Power Connections
DDO_P
USB
SW1
Reset
Power (+5V)
DDO_N
SDIO
OUTPUT
DDI_N
DDI_P
INPUT
BI-DIRECTIONAL
SW3
GPIO State
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1. Hardware User Guide
1.1 System Block Diagram
Figure 1-1: System Block Diagram
1.2 Quick Start Guide
1.2.1 Start-up Sequence
1. Shunt Configuration
There are two shunts that need to be placed on the board (if the board is not already
populated with these) before being powered.
• J1– set this to 1.2V/1.8V/2.5V as desired for the evaluation
Note: If evaluating the output pre-emphasis features, it is suggested to set this to
2.5V.
• J2– set to 2.5V
2. Connect to USB interface or use in stand-alone mode.
Note:
• For further information on GUI installation, use and features, see all of Section 2.
• Stand-alone mode does not require a USB connection to the device. For more
information on stand-alone mode see Step 4 below.
• If using GUI control and the board or microcontroller is reset, the GUI will need to
be reconnected to the Evaluation Board. See 2.2.1 Getting Started for information
on reconnecting the Evaluation Board.
GS12190
50Ω SMA
DDI
DDO
50Ω SMA
50Ω SMA
50Ω SMA
75Ω BNC
BNC SDIO
GS12190 Data Path—75Ω single-ended
GS12190 Data Path—100Ω dierential
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3. Power
Apply a 5V power supply to the board using the TP14 and TP13 or via the barrel jack J43.
Note: Do not apply more than 5.5V. If power has been correctly applied, D1 will light. If
there is a fault, D34 will light. If D1 does not light, check the voltage and polarity of the
source.
4. Stand-Alone Mode
Stand-alone mode allows for use of the GS12190 evaluation board without connection
to a PC. The available modes using this control are outlined in Table 1-2: Stand Alone
Mode Selection. To use the evaluation board in this mode, please see the following
steps:
1) Complete Steps 1 and 3 listed above.
2) Set SW3[3]/GPIO3 to the desired mode (see Table 1-2).
3) Press SW1 (RST) on the board, or remove and reapply power to the evaluation
board.
Note: If using stand-alone mode controls while the evaluation board is connected
to the GUI, the host must complete the following:
a) Click the “Disconnect” button located at the top of the GUI.
b) Press SW1 (RST) on the board, or remove and reapply power to the evaluation
board.
c) Reconnect the GUI to the evaluation board. See 2.2.1 Getting Started for
instructions on reconnecting the evaluation board to the GUI.
5. DIP Switch Configuration
SW3 can be used to switch pull-down resistors on each of the GS12190’s GPIO lines. The
pins are pulled up to 1.8V if the switch is open.
6. Indicators
Notes:
1. See “GPIO Control” in 2.2.2 Device Settings Tab for further information on changing GPIO functions.
Table 1-1: Indicators
LED Number GPIO Pin Test Point Default Function
D2 GPIO3 TP6 Input Select Control (Input)
D3 GPIO2 TP8 Sleep Control (Input)
D4 GPIO1 TP9
PLL Lock Status Indicator
(Output)
D5 GPIO0 TP7 LOS Indicator (Output)
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Figure 1-2: SW3 Location
Table 1-2: Stand Alone Mode Selection
SW3[3] GPIO3 Mode Description
0 Cable EQ
Utilizes DDI/SDIO signal path. See Section 1.3
for further information.
1 Cable Driver
Utilizes SDI/DDO signal path. See Section 1.3
for further information.
SW3[3:0]
GPIO State
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1.3 Configuration 1 — Cable EQ Mode
To use the GS12190 Evaluation Board in Cable EQ mode, complete one of the three
methods described below, then apply a SDI signal to SDIO. The differential output will
be available on SMAs labelled DDO.
Note: The numbers found in the brackets refer to Figure 2-10 and are used to show
locations in the GUI.
1. Set GPIO3 to 0 as described in Step 4 of 1.2.1 Start-up Sequence.
2. Using the GUI, ensure that the Input Select Mode is set to “CSR,” then set Input to
Cable EQ (6).
Note: By default GPIO3 is set pin “Input Select,” and while Input Select Mode = Pin,
driving GPIO3 HIGH will put the GS12190 into Cable Driver Mode, and driving it
LOW will put the GS12190 into Cable EQ mode (6). See Table 1-2 for further
information.
Figure 1-3: Configuration 1 — Cable EQ Mode
Cable EQ Input – BNC
Trace Driver Output– SMA
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1.4 Configuration 2 — Cable Driver Mode
To use the GS12190 Evaluation Board in Cable Driver mode, complete one of the three
methods described below, then apply a SDI signal to the SMA inputs labelled DDI. The
single ended output will be available on SDIO.
Note: The numbers found in the brackets refer to Figure 2-10 and are used to show
locations in the GUI.
1. Set GPIO3 to 1 as described Step 4 of 1.2.1 Start-up Sequence.
2. Using the GUI, ensure that the Input Select Mode is set to “CSR”, then set Input to
Trace EQ (6).
Note: By default GPIO3 is set pin “Input Select”, and while Input Select Mode = Pin,
driving GPIO3 HIGH will put the GS12190 into Cable Driver Mode, and driving it
LOW will put the GS12190 into Cable EQ mode (6). See Table 1-2 for further
information.
Figure 1-4: Configuration 2 — Cable Driver Mode
Trace EQ Input – SMA
Cable Driver Output – BNC
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1.5 Configuration 3 — Output Balanced Mode
The GS12190 has a feature designed to facilitate reliable Output Return Loss (ORL)
measurements on SDIO while the device is still powered. This mode is called “Balanced
Mode,” which prevents the outputs from toggling while ORL is being measured.
To put the GS12190 Evaluation Board into Balanced Mode, complete one of the two
methods described below, then connect your return loss measurement equipment to
SDIO.
1. Set GPIO3 to 1 as described in Step 4 of 1.2.1 Start-up Sequence.
2. Using the GUI, complete the following steps:
a) Set the Input Select Mode to “CSR,” then set Input to Trace EQ (6). See Figure
2-10: Main Tab Features Cable Equalizer Mode (6).
b) Navigate to the “Additional Features” tab in the GUI and click the Enable
Balanced Mode box. See Figure 2-12: Additional Features Tab (1).
Figure 1-5: Configuration 3 — Output Balanced Mode
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2. Software User Guide
2.1 Installing the GS12190 Software GUI
Click “I accept the agreement” as shown in Figure 2-1, and then click “Next.”
Figure 2-1: License Agreement
Before continuing with the setup, confirm that you meet the system requirements. Click
“Next.”
Figure 2-2: Software Requirements
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Now, select the destination where you would like the software GUI to be installed. Click
“Next.”
Figure 2-3: Select Destination Location
Next, select the start menu folder. Click “Next.”
Figure 2-4: Select Start Menu
v#.#.#
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v#.#.#
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Select if you would like to create a desktop icon (see Figure 2-5), and click “Next.”
Figure 2-5: Select Additional Tasks
Click “Install.”
Figure 2-6: Ready to Install
v#.#.#
v#.#.#,
v#.#.#
v#.#.#
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Lastly, check “Launch GS12190” and click “Finish” to complete the installation and
launch the GUI.
Figure 2-7: Finish Installation
Note: This application requires Microsoft.NET Framework 4.0 to be installed.
When it is desired to use the Evaluation Board with a GUI interface, it is required that the
Evaluation Board is connected to a PC through the internal USB interface.
v#.#.#
v#.#.#
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2.2 GUI Operation
2.2.1 Getting Started
Upon launching the GUI you will start at the main tab as shown in Figure 2-8.
To connect the GUI to the evaluation board and begin operation, complete the
following steps.
Note: The numbers found in the brackets refer to Figure 2-8 and are used to show
locations in the GUI.
1. Connect the Evaluation Board to your computer using the supplied USB cable.
2. Press Scan for Dongles (1).
3. Click the dropdown menu to the left of the Scan for Dongles button and select the
EB-GS12190-01 dongle (2).
Now the dongle is connected to the Evaluation Board. To get the current device status
press the Refresh button (3). You may also right click on any area of the GUI to bring up
another Refresh button which may be more accessible.
Additionally, there is an auto refresh function that the GUI can be set to use. This will
auto update the GUI once per second automatically. To enable this, tick the Auto box
that is found to the left of the Refresh button (3).
Figure 2-8: EB-GS12190 Main Tab
1
2
3
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2.2.2 Device Settings Tab
The Device Settings Tab has several items to be noted, they are as follows.
Note: The numbers found in the brackets refer to Figure 2-9 and are used to show
locations in the GUI.
• GPIO Control (3.1)
On this tab you can set each of the 4 x GPIO to an Input or an Output, and set
each of the GPIOs to the desired function via the dropdown menus.
• Save to Configuration (3.2)
This function allows the user to create and save device configurations to the PC
for use at a later time.
1. Configure the GS12190 to the desired settings via the GUI.
2. Click on “Save Configuration” under “File” on the menu bar.
3. Navigate to the destination folder, provide a file name.
4. Click on the “Save” button.
• Load From Configuration (3.3)
1. To load configuration, click on “Load Configuration” under “File” on the menu
bar.
2. Navigate to and select the folder where the file was saved.
3. Click on “OK”.
This will load the file into the device.
Figure 2-9: Device Settings Tab
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2.2.3 Main Tab
The Main Tab has several features for exploring the functionality of the GS12190. Some
notable items are called out in Table 2-1. For a full description of each control, please see
the GS12190 Data Sheet.
Note: The numbers found in the brackets refer to Figure 2-10 and Figure 2-11 and are
used to show locations in the GUI.
Table 2-1: Main Tab Features
Feature (Reference) Description
Input Visualizer (4)
Displays the currently selected signal path and labels the
associated inputs and outputs.
LSC (5)
LSC (Launch Swing Compensation) is used to compensate for
non SMPTE compliant upstream sources. This only needs to be
adjusted if the upstream source is not 800mV.
Note: This control is only applicable to Cable EQ mode.
Input Select (6)
Selects the active input: Cable EQ (BNC input) or Trace EQ (SMA
input).
The Mode Button selects between CSR (immediate) for GUI
control and Pin (immediate) control.
Note: If the evaluation board is set to use pin control, the
actively selected input will be set by the assigned GPIO pin. With
default settings applied, this is GPIO3. Driving GPIO3 HIGH will
put the GS12190 into Cable Driver Mode, and driving it LOW will
put the GS12190 into Cable EQ mode.
Driver Settings (7)
Displays current output state including: disable and mute status,
re-time status, and driver swing settings.
Trace Equalizer Boost (8)
This sets the gain on the Trace Equalizer. The default value is 2.
This value will need to be adjusted based on the insertion loss
profile of the input. See the “Input Trace Equalization” section of
the GS12190 data sheet for more details on boost setting
recommendation.
Note: This control is only applicable to Cable Driver mode.
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Figure 2-10: Main Tab Features Cable Equalizer Mode
Figure 2-11: Main Tab Features Trace Equalizer Mode
4
5
6
7
8
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2.3 Additional GUI Features
2.3.1 Additional Features Tab
The Additional Features Tab provides additional settings to control the Cable/Trace
Equalizer/Driver. For a full description of each control, please see the GS12190 Data
Sheet.
Note: The “Enable Balanced Mode” control should be checked when performing ORL
(Output Return Loss) measurements.
Figure 2-12: Additional Features Tab
1
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2.3.2 PRBS Tab
The PRBS Tab allows for control over the integrated PRBS7 generator/checker in the
GS12190. The PRBS7 generator/ checker is fully operational in both Cable EQ and Cable
Driver modes. The following is a description of how to use each function.
To use the PRBS Generator:
Note: Where applicable, each of the steps have a bracketed number which refer to their
position in Figure 2-13: PRBS7 Generator.
1. Ensure the Evaluation Board is connected to the GUI.
2. Click the Configure For PRBS Gen button (1).
3. Set the Signal Select to the desired setting from the dropdown menu (3).
4. Set the Clock Source to the desired setting from the dropdown menu (4).
5. Set the Clock Pre-Divider to the desired setting from the dropdown menu (5).
6. Set the Data Rate to the desired setting from the dropdown menu (6).
7. Click the Enable check box (2).
The device will now generate the set PRBS signal on its active output.
Note: If there is no signal present, ensure that the output is not disabled or muted.
Figure 2-13: PRBS7 Generator
1
2
3
4
5
6
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To perform a Continuous PRBS Measurement:
Note: Where applicable, each of the steps have a bracketed number which refer to their
position in Figure 2-14: PRBS7 Checker.
1. Ensure the Evaluation Board is connected to the GUI.
2. Apply a PRBS7 signal to the actively selected input.
3. Set the Measurement Type dropdown menu to “Continuous” (3).
4. Ensure that the Status field reads “Idle (ready for new operation)” (6).
5. Click the Start PRBS Measurement check box to start the measurement (4).
6. When it is desired to stop the measurement, Click the Start PRBS Measurement
check box to stop the measurement (4).
7. Results will appear in the Error Count field (5). The Status field will read “Idle
(ready for new operation)” if the operation was successful.
Note: If the GUI is not set to Auto-Refresh, clicking the Refresh button is required
for the error count to appear.
To perform a Timed PRBS Measurement:
Note: Where applicable, each of the steps have a bracketed number which refers to
their position in Figure 2-14: PRBS7 Checker.
1. Ensure the Evaluation Board is connected to the GUI.
2. Apply a PRBS7 signal to the actively selected input.
3. Set the Measurement Type dropdown menu to “Timed” (3).
4. Set the Measurement Timer Pre-Divider and Measurement Interval to the
appropriate values to get the desired measurement time (1) (2).
Note: To determine the measurement time set by Measurement Timer
Pre-Divider and Measurement Interval see Equation 2-1 . The maximum time the
PRBS Checker can be set to is approximately 3.35 seconds.
5. Ensure that the Status field reads “Idle (ready for new operation)” (6).
6. Click the Start PRBS Measurement check box to start the measurement (4).
7. Once the measurement is complete the Status field will read “Timed operation
completed (success)” (6).
Note: If the GUI is not set to Auto-Refresh, clicking the Refresh button is required
for this message to appear.
8. Results will appear in Error Count field (5).
9. Click the Start PRBS Measurement check box to remove the checkmark. This
prepares the PRBS Checker for its next measurement (4).
Equation 2-1
MeasurementTime Seconds MeasurementTimerPreDivider
MeasurementInterval 256 1+
1
40
------
MHz
=
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Semtech EB-GS12190 Evaluation Board User guide

Brand
Semtech
Model
EB-GS12190 Evaluation Board
Type
User guide
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