Frequency Range And Cw Mode Accuracy - HP 8340B Manual

4-2.
FREQUENCY
RANGE AND CW MODE ACCURACY
Specification
Table 4-4.
Frequency Range and
CW
Mode Accuracy
Specifications
Range:
HP 8340B:
0.01 to
26.50 GHz
HP
8341
B: 0.01 to
20.00 GHz
Resolution:
n x
1
Hz
Where
N
=
harmonic multiplication number Refer to Frequency Ranges and Bandswitch
Points
description
in
the specifications portion of Section
I.
Accuracy: Same as Time Base Accuracy
in
the specifications portion of Section
I.
Description
The HP 8340B/41B RF
output
is
supplied to
a frequency counter.
The
frequency counter internal time
base is used as the reference for the
DUT
to eliminate time base error from the
measurement. The
DUT
frequency display and the counter display
should agree, within the resolution of
each instrument.
This procedure does not test
for
CW
mode accuracy
as a
function of the time base accuracy.
NOTE
A
fault in
the DUT
could cause the two displays to be different. Any fault
that would cause one of the phase lock loops to be unlocked would
be
indicated by
a
front-panel
UNLK indication; however, all HP 8340B/41B
internal phase
lock loops could be locked
and the DUT output frequency
could be in
error
(i.e.,
a
phase lock loop frequency divider bit could
be
bad).
If
all the
dividers work normally, then CW mode frequency
accuracy
is
essentially guaranteed.
In
the following procedure, the test frequencies
are
selected
first to test the
maximum frequency
range and then to exercise each frequency related circuit throughout
its
CW
range while holding all
remaining circuits constant.
The test frequencies are grouped so that
an
abnormal Indication would
point to the
circuit
most likely causing the problem.
Equipment
Frequency Counter
....................................
HP
5343A
Option
011
Adapters
SMA (m) to BNC (f)
....................................
HP P/N 1250-1200
APC 3.5 (f) to APC 3.5 (f)
................................
HP P/N 5061-5311
(2
required
if DUT is HP 8340B)
(1 required
if DUT is
HP
8341
B)
Type
N (m)
to
APC 3.5 (f)
................................
HP P/N 1250-1744
(1 required
if DUT
is
HP 8341
B)
Cable (Semi-Rigid
SMA
male to
SMA
male)
.................
HP P/N 08340-20124
HP 8340B/41B
Performance Tests 4-13