COM-1028 FSK/MSK/GFSK/GMSK modulator -> COM-4004 0-80 MHz modulator

The baseline configuration in the 1028_4004.stn settings file is as follows:
- GMSK modulation, 1.25 Mbits/s, modulation index 0.5, 70 MHz center frequency

(a) Connect a serial cable between the COM-1028 and a host computer.
(b) power up the assembly. From the ComBlock control center File|Import menu, 
import the settings file 1028_4004.stn 
(c) Using a spectrum analyzer, observe the COM-4004 output signals at the J5 / RF_OUT
output SMA connector.

The spectrum shape is a main lobe of two-sided 3dB bandwidth 0.72 MHz (1028B, BT = 0.5).
The 1st sidelobes are visible at a relative spectral power density of -31 dB. 
The other sidelobes (if visible) are at a relative spectral power density below -45 dB.
Output power is -14 dBm.