Alc Accuracy Verification; Description; Test Equipment; Procedure - HP 8340B Manual

Chapter
11.
ALC
Accuracy Verification
11.0 Description
This program
Is not
a
test
in
that
it does
not verify
conformance
to
a specification.
Rather
it
is
a
verification of the operation of the automatic leveling control (ALC) circuitry This verification
Is
used
to alert the
operator
to any problems which may exist In the
ALC A
problem
in
this
circuitry will directly impact the output
power
flatness and accuracy, which Is
specified-
Since the ALC
Is not frequency dependent, the test Is
performed
at
two frequency
points,
one
point
in Band
0
and the other
In
Band
1
Checking the ALC
in
these two bands
verifies its
operation
in
the synthesizer's low frequency RF path and high frequency RF path At each
frequency, the
ALC
Is tested over Its
entire power range, —20 dBm up to
maximum
available
leveled
power
11.1
Test Equipment
Power Meter
-......
„ „
„
Power Sensor
...... „
„ „
....
Adapters:
APC 3.5 (f)
to
APC
35 (f)1
- - „ „ „ - - - -
APC 35 (f)
to Type
N
(m)^
- -
„
- .. -
„
Cable, Semi-rigid coax, SMA (m)
to
SMA (m)
HP436A Option 022
HP 8485A
„ „
HP P/N 5061-5311
.
HP P/N
1250-1744
HP P/N
08340-20124
11.2 Procedure
1
The softkeys provided
for
this
test are as follows:
VERIFY
-
Runs the ALC
verification This
is
key you should select to meet the
requirements of
an
operation verification
SETUP
-
Provides a
graphical display of the ALC accuracy test setup on the
CRT
JANITOR
-
Return to the test menu
Select the desired softkey and respond
to
any prompts provided by the program.
2
Upon completion of the verification, the test
will
indicate
pass or
fail
and
will display the
following softkeys:
PRINT
-
Output
the test results to the printer.
DISPLAY
-
Output the test
results to the
CRT
DONE
-
Return to the menu
in
step
1.
Select the desired softkey and respond
to any prompts provided
by the
program.
1
Required for an
HP 8340A/B OUT
only
2
Required tor an
HP
8341 A/B OUT
only
HP
8340A/B
and HP 8341A/B
ALC Accuracy Verification 31/32