HP 8568B, Руководство по испытаниям и регулировке работы, Страница: 248 / 313

2 1. Slope Compensation Adjustments
Procedure
1. Place instrument on right side as show in Figure 3-80, and remove
bottom cover.
2. Connect equipment as shown in Figure 3-80 with power splitter
connected to the output of the synthesized sweeper with a cable.
Connect one arm of the splitter directly to the SIGNAL INPUT of
the HP
Spectrum Analyzer, using a Male-to-Male adapter,
and the other arm to the power sensor.
3. Connect the power meter’s recorder output to the HP
LEVELING EXT INPUT.
4.
Press
PRESET
]
on the synthesized sweeper, and set its
controls to the following settings:
CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
POWER LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9.0
RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on
LEVELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INT
5. On the synthesized sweeper, press
(
POWER LEVEL
]
and adjust the
ENTRY knob as necessary for a power meter indication of -15.00
at 100 MHz.
6. On the power meter, press
[
RANGE HOLD
]
(turning it on).
7. On the synthesized sweeper, press
[
POWER LEVEL
]
and adjust the
ENTRY knob for a power meter indication of -10.00
at 100 MHz.
8. On the synthesized sweeper, press LEVELING and adjust
the
ENTRY knob (REF in with ATN: 0 for a power meter
indication of -10.00 at 100 MHz.
Note
Do not vary the synthesized sweeper POWER LEVEL setting
(internal leveling) or METER REF and METER ATN settings (external
power meter leveling) for the remaining steps in this section of the
adjustment procedure. The frequency response adjustments are
referenced to
the
-10.00 power level at 100 MHz.
9. Set the synthesized sweeper to the following settings:
START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 MHz
SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SINGLE
10. Set HP LINE switch to ON and press
PRESET
].
11. Key in
(
START
10 MHz, 1500 MHz,
(
REFERENCE LEVEL
)
-10 LOG
C
ENTER
1
12. On the spectrum analyzer, press TRACE A,
(
CLEAR WRITE
),
and
13. Trigger two full sweeps on the synthesized sweeper.
3-134 Adjustments