Anritsu MS2665C - Page 188

SECTION 6 PERFORMANCE TESTS
6-57
(4) Procedure
(a) Sweep Time
Step Procedure
1 Press the spectrum analyzer [Preset] key.
2 Operate All Cal.
3 Connect the MG3633A signal generator with the spectrum analyzer as shown in the setup
diagram.
4 Set the spectrum analyzer as shown below:
CENTER FREQ ....................................100 MHz
SPAN........................................................ 51 kHz
SWP TIME................................................. 50 ms
RBW..........................................................1 MHz
VBW .........................................................1 MHz
5 Set the MG3633A as shown below:
OUTPUT FREQ....................................100 MHz
OUTPUT LEVEL ................................. –16 dBm
MODULATION......................... AM (INT) 90 %
MODULATION FREQ ........................... 400 Hz
6 Press the [→ RLV] key.
7 Set the scale to Linear.
8 Press the [Single] key, then wait until a single sweep execution is completed.
9 Set the marker zone width to 5 Hz (Zone Width=5 Hz).
10 Move the marker to the left of the screen using the knob and set the zone marker on the left
most peak of the sine wave.
11 Setting the marker mode to ∆ (delta), move the current marker to the right using the knob.
Then set the zone marker to the 18th peak from the left most sine wave peak on the screen.
12 Read the frequency difference of the ∆ marker, which corresponds to 90 % of the Sweep Time.
Obtain the SWP TIME by the following equation.
SWP TIME (calculated) = Setting SWP TIME X
∆marker readout
51000 (Hz)