COM-3006 1850-2050 MHz receiver -> Variable Interpolation COM-1008

The baseline configuration in the 3006_1008.stn settings file is as follows:
1.85 GHz center frequency
100 KHz synthesizer frequency step.
External 10 MHz frequency reference.
-53 dBm input level threshold for full scale 10-bit A/D conversion.
External PLL-STROBE frequency hopping signal disabled.

Purpose: test the RF receiver module in presence of an input sinewave. 
Check the AGC (the COM-1008 controls the RF gain so that the signal 
prior to the A to D converter is 1V peak to peak.)
Check the ability to tune to two extreme frequencies 1850 and 2050 MHz.
Check the internal and external reference clocks.

(a) Connect an external 10 MHz frequency reference 
(generally available from a spectrum analyzer or RF signal generator) 
to the COM-3006 10 MHz input port [EXT FREQ REF / J7].

(b) Turn the power on. Import the 3006_1008.stn setting file into the assembly 
(from the ComBlock Control Center  File | Import menu).

(c) connect an RF frequency generator to the RF-IN input. 
Set the frequency to 1.85 GHz, level -53 dBm.

(d) using an oscilloscope, verify that test points TP1 and TP2 are 
low-frequency sinewaves of amplitude approximately 1Vpp.
The sinewaves represent the frequency difference between the RF signal generator 
and the COM-3006 external frequency reference.

(d) Verify AGC operation: increase the input level to -10 dBm
and create a frequency offset of approximately 100 KHz (to prevent AGC from tracking)
Verify that TP1 and TP2 remain at 1Vpp.

(e) Verify internal 10 MHz operation:
Disconnect the external frequency reference first. 
Modify REG04 to 0x00 (internal). You may have to turn the power off and then on. 
Check TP1 and TP2 again. The baseband sinewaves can reach up to 50ppm 
with respect to the synthesizer frequency because of the Crystal oscillator frequency.

(f) Frequency selection
REG6  
0x00 	RF frequency 0:	1850 MHz
0x20	RF frequency 1: 1850.1 MHz
0x40	RF frequency 2: 2050 MHz

Change the center frequency by modifing the REG6 from the ComBlock Control Center.
Change the signal generator frequency accordingly.
Using an oscilloscope, verify TP1 and TP2 are near-zero frequency signals.