Anritsu AWGN MU368060A - Manual (Page 71)

8.4 In-band Power Calculation Accuracy
8-5
8.4 In-band Power Calculation Accuracy
(1) Test criteria
Power ratio accuracy within the calculated bandwidth to total power
(when RF output level is –3 dBm)
±0.6 dB (1920 to 2170 MHz, noise band width set value: 4 to 8 MHz)
±2.0 dB (1920 to 2170 MHz, noise band width set value: 8 to 16 MHz)
(excluding when the noise internal adder function is On.)
(2) Measuring instruments for test
• Spectrum analyzer (with RMS detection mode)......MS2683A +
Opt04
(3) Setup
Anritsu
M ｷ 3681A
MS2683A + Opt04
Spectrum Analyzer
MG3681A+
MU368060A
RF Input RF Output
Anritsu MS2683A
(4) Test procedures
[1] Set the communication system for the MU368060A to "NOISE1".
[2] Press the [Preset] button and then set the following parameters:
Digital Modulation: On
[3] Set Noise Bandwidth and Calculate Bandwidth to be measured
on the MU368060A.
[4] Set the output level of the MU368060A to –3 dBm.
[5] Set the frequency to be measured on the MU368060A.
[6] Set the following parameters on the MS2683A. (For MS2683A
operations, refer to its operation manual.)
SPAN : 1.25 times or more of Noise Bandwidth
RBW : 1/150 times or less of Noise Bandwidth
VBW : Auto
Detector Mode : Rms
Storage Mode : Linear Average
Average Count : 50
Sweep Time : Auto