Teledyne LeCroy QPHY-SATA - Manual (Page 23)

QPHY-SATA Software Option
915745 Rev G
23
QPHY-SATA Variables
Product Type
Used to select whether the Product Under Test is a Serial ATA Host or Device. Hosts and devices require
different connections. If this value is set incorrectly, it will result in the wrong connection diagrams being displayed.
This variable also appears on the main Setup dialog. The default value is Device.
Generation
This variable allows the user to select the generation of the Product Under Test to indicate the max supported
speed. The choices are Gen1, Gen2 and Gen3. This variable also appears on the main Setup dialog. The default
value for this variable is Gen1.
Use PeRT3
This variable controls whether QualiPHY should automate a PeRT
3
to place the Product Under Test into BIST
mode. This variable also appears on the main Setup dialog. The default value is No.
Use RF Switch
This variable controls whether QualiPHY should use an RF Switch connected over GPIB to automate the
switching of connections between a PeRT
3
and the oscilloscope. This variable also appears on the main Setup
dialog. The default value is No.
PUT SSC Setting
Used to select whether the Product Under Test has Spread Spectrum Clocking (SSC) Enabled or Disabled. If this
value is set incorrectly, some tests that are specific to products with or without SSC will not run. This variable also
appears on the main Setup dialog. The default value is Disabled.
BIST Mode
This variable applies when a PeRT
3
is being used. It controls whether the PeRT
3
will place the Product Under
Test into BIST-L (loopback) mode or BIST-T (transmit) mode. The default value is BIST-L.
CIC S-Parameter File
This variable allows the user to specify the filename of the CIC S-Parameter file. This s-parameter file is used for
emulation of the compliance interconnect channel during the Gen 3 Jitter and Minimum Differential Voltage tests
(TSG-13 and TSG-15).
Gen1 PLL damping factor
Gen2 PLL damping factor
Gen3 PLL damping factor
These variables control the damping factor of the PLL used to recover the clock for jitter measurements at Gen1,
Gen2 and Gen3 data rates. Setting this value incorrectly results in more or less peaking in the PLL response and
will affect the jitter results. To tune the clock recovery to the precise response dictated by the Jitter Transfer
Function in the SATA specification, follow the calibration procedure for jitter measurement devices. The default
value is 0.707 for Gen1 and Gen2 and 0.78 for Gen3.