Anritsu 682XXB, 683XXB 682XXB/683XXB MM 3-13

Fine Loop
Test
Procedure
The following procedure tests the fine loop by step-
ping the instrument through ten 1 kHz steps (ten
100 Hz steps for instruments with Option 11)and
measuring the RF output at each step.
1. Set up the 682XXB/683XXB as follows:
a. Reset the instrument by pressing SYSTEM,
then Reset . Upon reset, the CW Menu is dis-
played.
b. Press Edit F1 to open the current frequency
parameter for editing.
c. Set F1 to the first test frequency indicated on
the TestRecord.
2. Record the Frequency Counter reading on the
TestRecord. The Frequency Counter reading
must be within ±100 Hz of the displayed 682XXB/
683XXB frequency (±10 Hz for instruments with
Option 11)to accurately complete this test.
3. On the 682XXB/683XXB, use the cursor control
key (diamond-shaped key) to increment F1 to the
next test frequency on the TestRecord. Record
the Frequency Counter reading on the TestRe-
cord.
4. Repeat step 3 until all frequencies listed on the
TestRecord have been recorded.
682XXB/683XXB MM 3-13
PERFORMANCE FREQUENCY
VERIFICATION SYNTHESIS TESTS