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TCR801
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Table of contents
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Tektronix TCR801 Online Help

Download
Optical Clock Recovery Application
Help
Register now! Click the following link to protect your product. www.tek.com/register
077-1697-00

Table of Contents

Table of Contents
Overview....................................................................................................................................................................................... 6
Getting started...............................................................................................................................................................................7
Operating basics........................................................................................................................................................................... 8
Application controls.........................................................................................................................................................8
File menu...................................................................................................................................................................... 10
Utility menu................................................................................................................................................................... 12
Help menu.................................................................................................................................................................... 15
Remote control commands......................................................................................................................................................... 16
Identification..................................................................................................................................................................16
Get Serial Number........................................................................................................................................................ 16
Get FW Version............................................................................................................................................................ 17
Stop Locking................................................................................................................................................................. 17
Get Lock Status............................................................................................................................................................ 17
Relock...........................................................................................................................................................................17
Get Autorelock State.....................................................................................................................................................18
Set Autorelock On or Off...............................................................................................................................................18
Check Error Status .......................................................................................................................................................18
Get Data Rate...............................................................................................................................................................18
Set Loop Bandwidth......................................................................................................................................................19
Get Loop Bandwidth..................................................................................................................................................... 19
Get Calibration Date..................................................................................................................................................... 19
Get Output State...........................................................................................................................................................20
Get Meas Data Rate..................................................................................................................................................... 21
Get Output CLK Freq....................................................................................................................................................21
Set Output State, ON or OFF........................................................................................................................................21
Get Optical PWR Status............................................................................................................................................... 22
Set Data Rate............................................................................................................................................................... 23
Start Locking.................................................................................................................................................................23
Reset............................................................................................................................................................................ 24
Optical Clock Recovery Application Help v

Overview

The Tektronix Optical Clock Recovery (OCR) application is Microsoft Windows based application wthat allows for remote connection to a TCR801 device to control and analyze clock recovery and signal parameters. Clock recovery for optical signals (CRO) recovers clock or sub-clock of PAM2 and PAM4 signals in the range of 52 to 58 GBd and 25 to 29 GBd.
The main advantage of this application is clock recovery in support of acquisition of optical signals on Tektronix sampling oscilloscopes. The CRO can support other equipment that requires recovered high-speed clock, such as error detectors and similar equipment.
Overview
Key features
• Optical-to-electrical conversion gain for high dynamic range
• Recovers clock from PAM2 and PAM4 signals with symbol rate in the range of 52 to 58 GBd
• Adjustable loop bandwidth from 0.2 to 10 MHz
• 2x Clock electrical output (CLK/4 (13 to 14.5 GHz) for a 52 to 58 GBd input, CLK/2 (13 to 14.5 GHz) for a 26 to 29 GBd signal)
• 2x20 LCD Display to view the ethernet address and symbol rate when the status is locked
• Ethernet port to control the instrument
• Type-B USB port to reset the IP configuration
• An external 12 V power supply
• Auto-relock functionality to relock the signals in seconds
Optical Clock Recovery Application Help 6

Getting started

Minimum system requirements

The following tables show the minimum hardware and software requirements to install and run the Optical Clock Recovery (OCR) application.
Table 1: Software requirements
Component Description
Operating system
Table 2: Hardware requirements
Component Description and quantity
Clock recovery instrument TCR801
Connectivity LAN cable - 1 No
Cable
Getting started
Windows 7 and above
1 Ethernet cable
2 SMA cables
Power Supply One 12 V power supply

Install the software

Complete the following steps to download and install the latest Optical Clock Recovery application. See Minimum system
requirements on page 7 for compatibility.
1. Go to the www.tek.com.
2. Click Downloads. In the Download menu, select Software as the DOWNLOAD TYPE, enter Optical Clock Recovery in the MODEL OR KEYWORD field, and click SEARCH.
3. Select the latest version of software and follow the instructions to download the application.
4. Double-click the executable and follow the on-screen instructions to install the application.
See also
Minimum system requirements on page 7
1 single mode optical fiber cable
Optical Clock Recovery Application Help 7

Operating basics

Launch the application

To launch the OCR application, double click on the Tek-OCR-Application icon on the desktop.
Operating basics

Application controls

The OCR application has a user interface controls. Use these controls to monitor and control the clock recovery and signal parameters.
Table 3: Application controls and descriptions
Control Description
Menu controls
File
Utility
Help
Minimize Click to minimize the OCR application.
• Default Setup
• Connect
• Disconnect
• Exit
• IP Configuration
• Software Upgrade
• About
• User Manual
• Third Party software attribution statement
Table continued…
Optical Clock Recovery Application Help 8
Operating basics
Control Description
Maximize Click maximize the OCR application.
Close Click to close the OCR application.
Configuration controls
Lock Status Displays the current status of the device. Possible status
indicators are Locked, Unlocked, Lost Lock, or Locking.
Default status is Unlocked.
Lock Click to start or end the lock process of the device.
Clock Output Select to toggle between clock output on or off.
Default status is Off.
Measured Input Power Displays the measured input power. Possible values are
Too Low, Low, Medium, High, Too High, None.
Default is None.
Loop Bandwidth Enter the loop bandwidth value in the text field.
Symbol Rate Enter the symbol rate value in the text field.
Measured Symbol Rate Displays the measured symbol rate value.
Clock Frequency Displays the clock frequency value.

Menu options

The menu bar provides access to the following controls.
Default value is the last entered loop bandwidth value on the device.
Default value is the last entered symbol rate value on the device.
Default value is 0.00 GBd.
Default value is 0.0 MHz.
Optical Clock Recovery Application Help 9

File menu

Operating basics
Table 4: File menu controls
Control Description
Default Setup Select to reset the application setup to default setting.
Default setting:
• Lock Status: Unlocked
• Clock Output: Off
• Measured Input Power: None
• Loop Bandwidth:
• 0.0 MHz when the device is disconnected
• Ranges between 0.2 to 10 MHz when the device is connected
• Symbol Rate:
• 0.00 GBd when the device is disconnected
• Ranges between 25.5 to 32 GBd or 51 to 64 GBd when the device is connected
Connect Select to connect to a TCR801 device. When selected, a
connect pop-up window appears that allows you to enter the IP address of the device and click Connect.
Disconnect Select to disconnect the OCR application from the
connected TCR801 device.
Table continued…
Optical Clock Recovery Application Help 10
Operating basics
Control Description
Exit Select to close the OCR application.
Tip: Ctrl+Q is the keyboard shortcut to close the application.
Connect to a TCR801 device
Complete the following steps to connect the OCR application to a TCR801 device:
1. Click File > Connect.
2. Enter the IP address in the text field of the pop-up window. If you have already entered the IP address, you can select it
from the drop-down list.
3. Click Connect.
Note: For instructions to connect the TCR801 to an oscilloscope, refer to the TCR801 Installation and Safety
Instructions that shipped with the instrument. The document is also available for download from www.tek.com/.
Optical Clock Recovery Application Help 11

Utility menu

Operating basics
Table 5: Utility menu controls
Control Description
IP Configuration Select to configure the IP address to establish the
connection between the TCR801 device and OCR application.
Software Upgrade Select to upgrade the TCR801 device software with the
latest available version.
IP Configuration
Optical Clock Recovery Application Help 12
Operating basics
Table 6: IP Configuration controls
Control Description
Serial Port (Port) Select to configure the serial port of the device to allow for
dynamic and static IP addresses.
Socket (Status) Allows you to change the IP configuration while connected
via ethernet when socket the status is connected.
Current IP Click Read to view the IP address of the connected device.
Read Click to retrieve the current IP address of the connected
device.
Current Configuration Dsiplays the the current IP address configuration.
Switch To Select the IP address type from the drop-down list.
• Dynamic IP: Dynamic IP address of the connected device
• Static IP: Static IP address of the connected device retrieved from the COM port
• Static IP (new): Static IP address of the device to be connected of your choice
Update Click to update the configuration with the newly selected IP
address type.
Preferred IP Enter the static IP address of your preferred device in the
text field.
Note: Preferred IP is applicable and enabled only when Static IP (new) is selected as the IP address type.
Close Click to close the IP configuration window.
Steps to configure the IP address of the TCR801 device
Complete the below steps to perform the IP configuration.
1. Connect the USB cable to the back panel of the TCR801 device.
2. Click Utility > IP Configuration in the application.
3. Select COM port in the TCR801 device from the drop-down list which indicates Silicon Labs. Refer TCR801 Installation
and Safety Instructions document for device related details.
4. Click Read to get the current configured IP address.
5. Select desired configuration from the Switch To drop-down list.
6. Click Update.
7. Repeat step 4 to confirm the changes.
Steps to upgrade the TCR801 device software
Complete the below steps to upgrade the TCR801 device software to the latest available version.
1. Click Utility > Software Upgrade.
2. Click Browse and navigate to the path and select the file.
Optical Clock Recovery Application Help 13
Operating basics
3. Click Upgrade.
4. Click Yes to confirm the upgrade version and to start the software upgrade.
5. The Upgrade Status field will display the software upgrade complete status in percentage followed with software
upgrade log.
6. A window pops-up to display that the software upgrade is successful.
7. After the software upgrade, the device is rebooted automatically and it is disconnected from the application.
Optical Clock Recovery Application Help 14

Help menu

Operating basics
Table 7: Help menu controls
Control Description
About Select to view the software, firmware, and other version details.
User Manual Select to launch this OCR application Help document.
Third Party software attribution statement
Select to view the copyright information and third party software license details.
Optical Clock Recovery Application Help 15

Remote control commands

Note:
For this product, the PI is setup on port 4000. So they need to set up their Visa controller to communicate on a socket on port 4000.
Abbreviating: Commands are generally presented in two different forms, long and short.
Concatenating: Command concatenation is not allowed.
Terminating: All commands sent to the unit must be terminated with a LF character: • \n, ASCII(10).
All PI commands have been divided into sections based on what commands can be used in what locking state. Some commands can only be used while locked, and some only while unlocked.

Lock state: All (unless noted)

Query: ALL commands have been setup as a query. If you send a standard query command, like *IDN? you will receive the requested information on the return. If you send a non standard query command that is just a write, like "CREC:ACQL" you will get a return when the task has been completed, typically in the form of "Written Successfully".

Identification

Gets the instrument information (Query only).
Remote control commands
Group
Lock State: All (unless noted)
Syntax
*IDN?
Return
<Manufacturer>, <Model>, <Serial Number>, <FW version(s)>

Get Serial Number

Gets the serial number of unit (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:SNUM? or CRECovery:SNUMber?
Return
String of characters
Example
CREC:SNUM? returns the serial number of unit B010101.
Optical Clock Recovery Application Help 16

Get FW Version

Gets the firmware version of FPGA, MCU, SOM Uboot, Som Linux, and SOM Application (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:FWVER? or CRECovery:FirmWareVERsion?
Return
String of characters and numbers.

Stop Locking

Set the locking process of the device (Query only). This command is allowed only when the device is LOCKED or LOCKING.
Group
Lock State: All (unless noted)
Syntax
Remote control commands
CREC:ENDL or CRECovery:ENDLock
Return
Written state (Success or Error)

Get Lock Status

Queries the lock status of the device (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:LST? or CRECovery:LSTate?
Return
Lock state {Locked / Unlocked / Locking / Lost Lock}

Relock

Initiates the relock function of the device (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:RELOCK
Return
Written state (Success or Error)
Optical Clock Recovery Application Help 17

Get Autorelock State

Quries the Autorelock state of the device (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:AUTORELOCK? or CRECovery:AUTORELOCK?
Return
Autorelock Enabled or Disabled

Set Autorelock On or Off

Sets on or off autorelock functionality (Query only). Autorelock will allow user to remove a source while locked, and then replace the source while the CR quickly relocks.
Group
Lock State: All (unless noted)
Syntax
Remote control commands
CREC:AUTORELOCK “<value>” or CRECovery:AUTORELOCK "<value>"
Arguments
<value>: {ON / OFF}
Return
Written state (Success or Error)
Example
CREC:AUTORELOCK "ON"

Check Error Status

Queries the error status (Query only). If error status query is sent, it returns the most recent error. If error status query is sent again it returns the previous one, until the queue of error messages is clear.
Group
Lock State: All (unless noted)
Syntax
CREC:ERRSTAT? or CRECovery:ERRorSTATus?
Return
Error state of unit (No error, range limit error, data rate mismatch error, etc.)

Get Data Rate

Queries the configured data rate (Query only).
Group
Lock State: All (unless noted)
Optical Clock Recovery Application Help 18
Syntax
CREC:DRATE? or CRECovery:DataRATE?
Return
Data rate in GBd

Set Loop Bandwidth

Sets the loop bandwidth in MHz (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:LBW "<value>" or CRECovery:LoopBandWidth "<value>"
Arguments
<Value> = 0.2 to 10
Example
CREC:LBW "6.5"
Remote control commands
Return
Written state (Success or Error)
Condition
Loop bandwidth command is enabled in CSV / User mode only.
Use-case scenario: If set loop bandwidth command is given in Unlocked state it updates the variable and in locking process the respective loop bandwidth is written.

Get Loop Bandwidth

Gets user provided loop bandwidth (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:LBW? or CRECovery:LoopBandWidth?
Return
Loop bandwidth value in MHz

Get Calibration Date

Queries the calibration date from the loop bandwidth and clock output tables CSV file (parsing from date coloumn) (Query only).
Group
Lock State: All (unless noted)
Optical Clock Recovery Application Help 19
Syntax
CREC:CALIBDATE? or CRECovery:CALIBrationDATE?
Return
Returns calibration date in mm/dd/yyyy format for both loop bandwidth and clock output tables.

Get Output State

Queries the state of output clock (Query only).
Group
Lock State: All (unless noted)
Syntax
CREC:OUTCLK? or CRECovery:OUTputCLocK?
Return
Output state (ON / OFF)
Remote control commands
Optical Clock Recovery Application Help 20

Lock State: LOCKED

Note: If the instrument is in Locking or Unlocked state, command is not accpeted by the instrument and 'Invalid
access' error will be returned by the application.

Get Meas Data Rate

Queries the measured data rate of the device (Query only).
Group
Lock State: LOCKED
Syntax
CREC:MDRATE? or CRECovery:MeasureDRATE?
Return
Data rate in GBd

Get Output CLK Freq

Queries the output clock frequency of the device (Query only).
Group
Remote control commands
Lock State: LOCKED
Syntax
CREC:OUTFREQ? or CRECovery:OUTputFREQuency?
Return
Clock frequency in GHz

Set Output State, ON or OFF

Sets the output state as ON or OFF for the CLK outputs of the device (Query only).
Group
Lock State: LOCKED
Syntax
CREC:OUTCLK "<value>" or CRECovery:OUTputCLocK "<value>"
Arguments
<Value> = {ON / OFF / 0 / 1}
Example
CREC:OUTCLK "ON"
Return
Written state (Success or Error)
Optical Clock Recovery Application Help 21

Get Optical PWR Status

Returns Optical power status (Query only).
Group
Lock State: LOCKED
Syntax
CREC:OPTPWRSTAT? or CRECovery:OPTicalPoWeRSTATus?
Return
Level (Low, Medium or High similar to the GUI.)
Remote control commands
Optical Clock Recovery Application Help 22

Lock State: Unlocked

Note: If the instrument is in Locking or Locked state, command is not accepted by instrument and "Invalid access"
error will be returned by the application.

Set Data Rate

Sets the data rate in GBd (Query only).
Group
Lock State: UNLOCKED
Syntax
CREC:DRATE "<value>" or CRECovery:DataRATE "<value>"
Arguments
<Value> = 51 to 64 GBd
Example
CREC:DRATE "55"
Return
Remote control commands
Written state (Success or Range limit error)

Start Locking

Initializes the locking process (Query only). This command is allowed only when the device is UNLOCKED.
Group
Lock State: UNLOCKED
Syntax
CREC:ACQL or CRECovery:ACQuireLock
Condition
Acquire lock command is accepted only when there is no error state.
Use-case scenario I: If "No Lock" occurs due to Symbol rate mismatch. The error state need to be cleared by giving end process command CREC:ENDL and again can start locking(CREC:ACQL).
Use-case scenario II: When the input of Data Rate is not in valid range CREC:ACQL command is not accepted. Clear the range error by changing the value within limits and give CREC:ACQL or give ENDL and ACQL to start lock with default values again.
Use-case scenario III: Giving ACQL without ending process will not be accepted. Giving continuous ACQL command will be ignored.
Related commands
CREC:ENDL
Return
Written state (Success or Error)
Acquiring Lock process is stopped only when CREC:ENDL (End the process) command is used.
Optical Clock Recovery Application Help 23

Reset

Remote control commands
Resets the device settings to factory default values (Query only).
Group
Lock State: UNLOCKED
Syntax
CREC:RESET
Return
Written state (Success or Error)
Optical Clock Recovery Application Help 24
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