Modulation Operation
Giga-tronics 2500B Series Microwave Signal Generators
Page 40
Operation Manual, Part Number 34737, Rev C, June 30, 2011
5.2
Generate an Internally Modulated AM Signal
The procedure below describes how to generate an AM signal with the following characteristics:
Carrier frequency = 1.00 GHz
Carrier power = 1.00 dBm
Depth of AM modulation = 20 %
Rate of AM modulation = 50 kHz
Modulating waveform = sine wave
NOTE:
The example procedure in this section uses specific parameters to illustrate how to setup the 2500B. You can use
this procedure for real-life situations by simply changing the parameters to fit your needs.
Table 19: Generate an Internally Modulated AM Signal
Generate an Internally Modulated AM Signal
Step
Action
1.
Verify that the RF output is NOT energized by checking the RF on/off indicator on the front of the
2500B (see Figure 3 on page 11). If the indicator is lit, press the
button to
de-energize the RF output.
2.
Connect the RF output on the 2500B as needed.
3.
Press the
menu button (see Figure 3 on page 11).
4.
In the CW menu, select 1.00 GHz for the frequency of the AM signal:
1.
Press
Frequency.
2.
On the numeric keypad on the front panel of the 2500B, enter 1.
3.
Press the GHz Units button (next to the numeric keypad) to enter the new frequency.
NOTE:
You can also use the
keys and
to change the frequency.
5.
In the CW menu, select 1.00 dBm for the power level of the AM signal:
1.
Press
Power.
2.
On the numeric keypad on the front panel of the 2500B, enter 1.
3.
Press the GHz (nSec/dBm) Units button (next to the numeric keypad) to enter the new power
level.
NOTE:
You can also use the
keys and
to change the power level.
6.
Press the
menu button.
7.
In the AM Main Menu, press
AM Int Menu. This opens the AM — Internal Waveform
submenu (see Figure 18 on page 38).
Soft Button
AM
Soft Button
Soft Button
CW
RF ON
