CW Operating Mode
Last updated: July 23, 2008
When in CW operating mode, the test set operates like a signal generator. The basic features provided by CW operating mode are:
Test Signals Description
The test set in CW operating mode provides any one of three test signals: CW (no modulation), AM (fixed 56% amplitude modulation), and DSB-SC (dual side-band suppressed carrier). An example usage of the test signals is for calibrating mobile stations that use Qualcomm's radioOne Zero Intermediate Frequency (Zero IF) architecture.
You can select any one of three signals with adjustable power level and frequency for output to the currently selected front panel RF connector.
With CW test signal selected (the default setting), the test set provides an unmodulated carrier. With either AM or DSB-SC test signal selected, the test set will modulate the signal as shown in the following figure.
For any of the test signals selected, the output power level is controlled by the
). The Cell Power refers to the power found in the entire signal including sidebands if applicable.
For any of the test signals selected, the frequency is adjusted by changing the
RF Gen Freq
With the CW or AM signal selected, the RF Gen Freq setting represents the center frequency of the signal (fc).
With the DSB-SC signal selected, the RF Gen Freq setting represents the frequency of the lower sideband signal (fL). The upper sideband (fh) is 20 kHz above the RF Gen Freq setting, that is fh = fL+20 kHz.
Use the following commands to control each function for CW operating mode: