Anritsu 682XXB - Manual (Page 72)

Coarse Loop/
YIG Loop Test
Procedure The following procedure tests both the coarse loop
and YIG loop by stepping the signal generator
through its full frequency range in 1 GHz steps 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 Test Record for the model being tested.
2. Record the Frequency Counter reading on the
Test Record. The Frequency Counter reading
must be within
±100 Hz of the displayed 682XXB/
683XXB frequency to accurately complete this
test.
NOTE
The Frequency Counter reading is typi-
cally within
±1 Hz because the instruments
use a common time base. Differences of a
few Hertz can be caused by noise or counter
limitations. Differences of
³±100 Hz indi-
cate a frequency synthesis problem.
3. On the 682XXB/683XXB, use the cursor control
key (diamond-shaped key) to increment F1 to the
next test frequency on the Test Record. Record
the Frequency Counter reading on the Test Re-
cord.
4. Repeat step 3 until all frequencies listed on the
Test Record have been recorded.
3-12 682XXB/683XXB MM
PERFORMANCE FREQUENCY
VERIFICATION SYNTHESIS TESTS