Anritsu MS2665C - Page 146

SECTION 6 PERFORMANCE TESTS
6-15
Frequency Readout Accuracy Test
(Note) In case of MS2665C, if there is no buffer output for the reference oscillator (Option 01)
on the rear panel, input a reference signal from an external 10 MHz frequency standard
to the main body and signal generator.
(4) Precautions
Set the signal generator output level to approx. –10 to –20 dBm.
(5) Procedure
Step Procedure
1 Press the [Preset] key.
2 Operate Freq Cal.
3 Connect the MG3633A output to the spectrum analyzer RF Input.
4 Set the spectrum analyzer as shown below:
Span.......................................................... 20 kHz
Center Freq..........................................1000 MHz
5 Set the MG3633A output frequency to the f
1
frequency (999.992 MHz) shown in the table on
the next page.
6 Adjust the MG3633A output frequency to set the spectrum peak at the 1st division from the
left end of the screen scale.
Remember the frequency as f
1
' .
7 After setting the MG3633A output frequency to the f
2
frequency (1000.008 MHz), adjust it to
set the spectrum peak at the 9th division.
Remember the frequency as f
2
'.
8 Calculate (f
2
'–f
1
')/0.8 and check that the value is within the specified range (minimum to
maximum values) shown in the table on the next page.
9 Repeat steps 4 through 8 for each frequency span with 1 GHz center frequency shown in the
table on the next page.