HP 8340B Manual page 23

4-2.
FREQUENCY
RANGE AND CW MODE ACCURACY (Cont'd)
f.
Select
a
step size of
1
MHz by pressing
[SHIFT] [CF] [1] [MHz].
Press
the
[CW]
key to view
the
CW
frequency
in
the
[ENTRY DISPLAY]. The CW
frequency should be at 2318.97000
MHz.
g.
Using the
down arrow
key,
step the CW frequency down
to
2310.970000 MHz- Check
the
counter indication at each step.
The counter
should indicate the
DUT CW frequency
±
1
Hz
±
the
resolution
of the counter.
NOTE
The
above steps program the
20/30 frequency
from 21.03 MHz to 29.03
MHz in
1
MHz steps and check the
remaining
N1
Divider programming
bits.
8. If
frequency errors occurred, the instrument requires service. To troubleshoot the instrument,
determine what frequency related circuit is
most likely to have caused
the
symptom
(i.e.,
M/N
Loop or
20/30
Loop) then refer to Section VIII of the Service Manual (may be ordered separately).
4-18
Performance Tests
HP 8340B/41B