Hardware Setup
•
The composite signal input patterns used by the GC5325 are generated using the TSW3100 pattern
generator. The TSW3100 is programmed through an Ethernet cable via FTP commands issued by the
GC5325GUI. The TSW3100 CMOS output headers J63 and J64 connect to corresponding female
40-pin headers J1 and J3 on the bottom of the GC5325EVM. These headers provide composite signal
data, baseband clock, frame strobe, and synchronization to the GC5325EVM. Align the GC5325EVM
bottom connectors J1 and J3 over the top connectors J63 and J64 of the TSW3100. Ensure that all
pins are aligned with the sockets. Press down on the GC5325EVM until the connectors are flush with
each other.
•
The TSW3100-required input CMOS clock is provided by connecting the CMOS_CLK SMA (J73) on
the TSW3100 to PG_CLK_OUT SMA (J2) connector on the GC5325EVM using the provided SMA
coaxial cable as shown in Figure B of the provided GC5325SEK Figures file on the provided CD. It is
used for providing the reference clock from the GC5325EVM, which is derived from the YOA and YOB
output of the CDCM7005 through the FPGA (dividing by 3). The frequency on GC5325 J2 must be the
VCXO frequency divided by 6. With the 737.28-MHz VCXO, this output is 122.88 MHZ. Install the
provided SMA coaxial cable between these connectors.
•
Downloading of the DSP runtime code and control of the RF section of the card, including the clock
generator (CDCM7005) is achieved through the DSP Weuffen USB-UHPI interface board, which plugs
into J25 and J26 of the GC5325EVM. Plug in the provided USB cable from the mini-USB port on the
small green interface board mounted on the top of the GC5325EVM in the lower left corner and to a
host PC USB port
•
Power to the system comes from the provided 19-Vdc power supply (Dell) through J7. An alternate
method is to provide 19 Vdc to connector J23. The GC5325EVM converts the 19 Vdc down to the
required voltages needed by the board as well as generate the 4.5 - 5 Vdc for the TSW3100. Connect
the provided power supply to connector J7 of the GC5325EVM. Switch SW4 is the GC5325SEK main
power switch.
•
Power for the TSW3100 is made available from the GC5325EVM on connector J22 (PG_PWR) via the
provided power cable which plugs into the power connector J9 on the TSW3100 as shown in Figure D
of the GC5325SEK Figures file on the provided CD. Install the provide power cable as shown. Ensure
that switch SW1 on the TSW3100 is set to the ON position, SW5 is in the OFF position and all
switches on SW2 are set to the " Open" position.
•
Control of the TSW3100 is through an Ethernet interface between the TSW3100 and the host PC. The
GC5325SEK provides an USB-to-Ethernet adapter which allows the user to use an USB port for this
interface instead of the Ethernet port, which in most cases is already being used. Connect the provided
Ethernet cross over cable between the TSW3100 and the adapter. Next connect the adapter to an
USB port. The GC5325SEK setup now appears as shown in Figure E of the GC5325SEK Figures file
on the provided CD.
•
Local oscillator (LO) inputs are located at SMA connectors J20 and J19 (see
). The board
default configuration is to operate with a single LO source provided from TX_LO_IN connector (J20).
Connect the external LO source to J20 and set the desired frequency. If using the high frequency
configuration (default) use a power level such that the power at the input connector J20 is at
approxi2 dBm. If using the low frequency configuration, depending on the frequency selected,
the LO power should be set approximately to -7 dBm to prevent signal saturation. If using an external
filter (recommended) with the external LO source, any cable and filter loss must be taken into
consideration.
4
GC5325 System Evaluation Kit
SLWU063F
–
April 2009
–
Revised April 2011
Copyright
©
2009
–
2011, Texas Instruments Incorporated
