Tel: 886.2.2175 2930 Email: [email protected]
www.salukitec.com
37
spectrum analyzer through one cable, as shown in Fig. 4-1. Enable the ON state of the modulation output and radio
frequency.
b) Reset the spectrum analyzer into the default state:
Press [Reset].
c) Set the reference level of the spectrum analyzer:
Press [Amplitude] , [Ref Level] and -10[dBm];
Press [Amplitude] and [Scale/Div] and set the scale as 10dB/division.
d) Set the resolution bandwidth and video bandwidth:
Press [BW] and [RBW Auto Man], and set the resolution bandwidth as 30kHz;
Press [BW] and [VBW Auto Man], and set the video bandwidth as 30kHz or less.
e) Enable the ACPR measurement:
Press [Measure], [ACPR] and [ACPR Off On] to enable the ACPR interface.
f) Set the center frequency of the main channel:
Press [Center Freq] and set the center frequency of the main channel with number keys, i.e. 1GHz.
g) Set the bandwidth of the main channel:
Press [Main Ch BW] and set the bandwidth of the main channel with number keys, i.e. 1MHz.
h) Set the adjacent channel bandwidth:
Press [Adj Ch BW] and set the adjacent channel bandwidth with number keys, i.e. 2MHz.
i) Set the channel spacing:
Press [Ch Spacing] and set the channel spacing as 1MHz with number keys.
j) Enable the ACPR test:
Press [ACPR Off On]. Then the measurement results will be displayed at the bottom of the screen. Refer to Fig. 4-4
for the schematic diagram of ACPR measurement.
