HP 8340B Manual page 281

5-14.
UNLEVELED RF OUTPUT ADJUSTMENTS (Cont'd)
39. Press [RECALL] on the
DUT
and iterate between registers
1
and
2
by pressing
[1] and
then [2].
Verify that the fast
sweep speed trace (register
2)
is
no
more than
a
1
dB below the slow sweep
speed trace (register 1)
at
any
point. Also, the minimum
power
point on the fast
sweep speed trace
should be
>
1 dB above the maximum
leveled
power specifications for the Band.
If
either of the
above conditions are not met,
repeat steps 36 through 40.
40. Iterate between registers
1
and
3
and press
[SINGLE] (initiates the single
sweep) after selecting
register
3. Verify
that the
single
sweep
trace (register
3)
is no more than
1 db below
the slow
sweep trace
(register 1) at any point. Also, the minimum
power
point on the single
sweep trace
should be
>
1 dB above the maximum leveled power specifications for the Band. If either of the
above conditions are not met, repeat steps
36 through 40.
If
the
DUT
is
an
HP 8341 B, proceed to step 51.
Band
3 Delay Compensation, HP 8340B
41.
Press the following key
sequence
on the DUT:
[CONT]
(If not already
in
continuous sweep
mode)
[START FREQ] [1] [3]
[.]
[3] [5] [GHz]
[STOP FREQ] [2] [0]
[GHz]
[SWEEPTIME] [2] [0] [0] [msec]
[SAVE] [7]
[SWEEPTIME] [AUTO]
[SAVE] [8]
[SINGLE]
[SAVE] [9]
[RECALL] [8]
Adjust
the scope's
vertical position and/or
sensitivity to view the
swept display.
42. Access
Cat
Constant
7
by pressing
[SHIFT] [GHz] [7] [Hz] [SHIFT] [ENTRY OFF]
on the
DUT.
43. Using the DUT's rotary knob, adjust Cal Constant
7
(range
is 0
to 131) to optimize the
power
across the entire Band.
If
Cal Constant
7 is
unable to optimize (peak) the majority of Band 3
at the
same
time
(>
60%
of the Band should peak at the same time), then
proceed
with step 44.
Otherwise, proceed with step 50.
44. On the DUT, press [1] [0]
[0] [Hz]
to return Cal Constant
7
to 100. Repeat
steps
36 and
37.
45.
Press
[RECALL] on
the
DUT
and iterate between registers
7
and
8 by pressing
[7]
and then [8].
Verify that the fast sweep speed trace (register 8)
is
no
more than
as
1 dB below the slow sweep
speed trace (register 7) at any
point. Also,
the minimum power
point on the fast
sweep speed
trace
should be
>
1 dB above the maximum leveled power specifications for Band
3. If
either of
the above conditions are not met, repeat steps 42 through 45.
46. Iterate between registers
7
and
9
and verify that the single
sweep
trace (register 9)
is
no more than
1
db below the slow sweep trace at any point. After pressing
[9]
on the
DUT
you need to press
[SINGLE]
to initiate the
single
sweep.
Also, the minimum
power
point on
the single sweep trace
should be
>
1 dB above the maximum leveled power specifications for Band 3.
If
either of the
above conditions are not met, repeat
steps
42 through
46.
47. Press
[RECALL] [2]
on the
DUT
(recalls the Band
4 fast sweep setup). Adjust the scope's vertical
position and/or sensitivity to view the swept
display.
5-82
Adjustments
HP 8340B/41B