HP 8340B Manual page 56

4-10.
POWER SWEEP TEST
(Cont'd)
Equipment
Power Meter
..........................................
HP 436A
Option 022
.........
HP 8485A
. .
HP P/N
5061-5311
. .
HP P/N 1250-1744
Power Sensor
........................................
Adapters
APC 3.5 (f) to APC 3.5 (0
..............................
(1 required if DUT
is
HP 8340B)
Type
N(m)
to
APC 3.5 (f)
..............................
(1 required if DUT
is
HP 8341 B)
Procedure
1.
Connect equipment as shown
in Figure 4-10. Connect the HP 8485A Power Sensor
to the Power
Meter. Allow
a
one hour warm
up time.
Set the Power Meter's
calibration switch to include
1
GHz,
then zero and calibrate the Power
Meter before connecting the Power Sensor to the DUT.
2. Press
the DUT's [INSTR PRESET].
Press the
[CW] key
and enter
[1] [GHz].
3.
Press
[SHIFT] [PWR SWP]
to
allow the ALC and RF step attenuator
to be independently con¬
trolled.
NOTE
The step
up
and step
down
keys
control the RF attenuator.
The numeric
key pad and
rotary knob control the ALC
power level.
4.
Enter
[—] [2] [0] [dBm] ALC
Power
level to
set
the start of the
power sweep
at —20 dBm. Press
[PWR SWP]
and enter
[2] [1] [dBm]
to set the
power sweep
range to
>20
dB (The maximum
power sweep range is
from —20 dBm to maximum power).
5.
Press the
[MANUAL]
key.
Turn the rotary knob counterclockwise to find the beginning of the
power sweep
(i.e., the power meter indication
is
at maximum and no longer changing). Record the
power meter indication.
NOTE
The POWER dBm display
will indicate the approximate output power
during
a
very slow or
manual sweep.
6.
Rotate the
rotary knob clockwise to find the end of the power
sweep
(i.e.,
the power meter
indication is at maximum and no longer changing). Record the
power meter indication.
7.
The
difference between the
power meter
indications recorded
in
step
5
and step
6
must be s:20
dB.
8.
Press the [CW] key
and
enter [5] [GHz]. Set
the
power meter's
calibration factor switch to include
this frequency.
Repeat steps
5
through
7
at
CW
frequencies of
10, 15,
and,
if
the
DUT
is
an
HP 8340B, 26 GHz.
4-54
Performance Tests
HP 8340B/41B