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HP 8642A - Page 282

HP 8642A
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Performance
Tests Model
8642A/B
Frequency
(MHz)
4.000
4.000
4.000
4.000
1000.000
1000.000
1000.000
1000.000
2000.000
2000.000
2000.000
2000.000
4-32
PERFORMANCE
TESTS
3a.
Measurement
Re-connect
the
instruments
as shown in Figure
4-
8 step 2a. Set
the
Signal
Generator
and
HP
8642
frequency
to
the
value listed
in
the
table below. Set
the
Signal
Generator
level
to
the
Sig Gen Level
recorded
in
the
table below. Set
the
HP8642
level to
the
values given
in
the
table below. On
the
HP
8642
enable
the
phase
increment
mode (SHIFT SPCL 250)
and
use
the
knob
to
vary
the
phase.
As
the
phase of
the
HP
8642
is varied
the
readings on
the
measuring
receiver should change. Record
the
maximum
and
minimum
readings
on
the
measuring receiver display in the table below.
3b.
Subtract
the
Maximum
from
the
Minimum
reading
in
Step 3a
and
record
the
Result in
the
table below. Verify
that
the
actual
result
is
less
than
the
specified Maximum.
8642
Level
(dBm)
10.0
6.0
-1.0
-6.0
10.0
6.0
-1.0
-6.0
10.0
6.0
-1.0
-6.0
Sig
Step
3
Results
Step
2a
Step
2b
Gen
Readings
(Max-Min)
Reading
Reading
Level
Min
Max
Actual
Maximum
6.02 dB
6.02 dB
----
3.52 dB
3.52 dB
6.02 dB
----~-----
_
..
_--
6.02 dB
3.52 dB
3.52 dB
---
--_.-
6.02 dB
6.02 dB
3.52 dB
3.52
dB
NOTE
If
actual
SWR
values
are
n.eeded,
compute
SWR
using
the
following
formula:
SWR=10"'(((max
-
min
in
dBm}}/20}

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