Settings filename: 5002_8002_3001.stn

COM-3001 Dual-band [915/2400 MHz] receiver 
  -> COM-8002 High speed data acquisition 
    -> COM-5002 LAN/TCP-IP Network Interface


Test objective: 
Receive a low-level offset RF (915.5 MHz) signal, translate its frequency to baseband (500KHz offset), 
collect I & Q baseband samples at 40 Msamples/s, 2*10-bit precision.
Store the samples into a file and save it on the host computer.

The baseline configuration in the 5002_8002_3001.stn settings file is as follows:
915 MHz center frequency
100 KHz synthesizer frequency step.
External 10 MHz frequency reference.
-52 dBm input level threshold for full scale 10-bit A/D conversion.
External PLL-STROBE frequency hopping signal disabled.

The IP address is set by this test script at 172.16.1.128.
The host computer network address should be consistent with the network address above.
To change the assembly IP address, change registers REG0/1/2/3 in COM-5002 using 
the comblock control center or by editing the 5002_8002_3001.stn text file. 
Please make sure the IP address is unique. 

Note: the same test script can be used when connecting over serial link or over the LAN
from the ComBlock Control Center. When using a serial link, please be sure to connect
the DB9 connector to the COM-5002.


(a) Connect a serial cable between a PC and the COM-5002. Power up the ComBlock assembly.
Wait 10 seconds for the FPGAs to configure. From the ComBlock Control center, import 
the configuration file 5002_8002_3001.stn using the File|Import menu.
Turn the assembly power off then on again.

(b) If the IP address 172.16.1.128 cannot be used, change registers REG0/1/2/3 
in COM-5002 using the comblock control center. 

(c) Connect an external 10 MHz frequency reference 
(generally available from a spectrum analyzer or RF signal generator) 
to the COM-3001 10 MHz input port (labeled EXT FREQ REF).

(d) Using a RF signal generator, insert a 915.5 MHz input signal into the
COM-3001. The input level should be in the range -20 to -50 dBm.

(e) Connect a LAN cable between the COM-5002 RJ-45 connector and a LAN Hub, 
using a straight cable. The LED close to the RJ-45 connector should be ON. 
The COM-5002 can also be connected directly to a PC using a crossover cable.

(f) Open the logic analyzer window from the ComBlock Control Center Functions | Logic Analyzer.
Press apply to collect 10,000,000 bytes worth of complex samples. Note: 2.5 bytes are used for 
each 2*10-bit complex sample. Upon successful completion, a window will popup. 

(g) Download the collected samples from DRAM to host computer:
- select a download file name
- select the 'Start Download' action.
- press the 'Apply' key. 
Upon successful completion, a window will popup. 

(h) To unpack the binary file and plot the resulting I and Q samples, 
- get the unpacker.exe program from the ComBlock CD (Matlab_C code\com8002util_002.zip)
  or from the comblock web site http://www.comblock.com/download/com8002util_002.zip
- the unpacker program generates an output file named outputFile.txt (2 columns, unsigned).
  It is sometimes easier to locate the unpacker.exe program in the same directory as in 
  the capture file. 
- plot the outputFile.txt (using Matlab 'load' command or MS Excel 'import' command.
The plots should show two 90 deg offset sinewaves.