Filter
Top Products
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
8568B
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
8340A/B’s
LEVELING EXT INPUT.
4. Press (INSTR PRESET] on the synthesized sweeper, and set its
controls to the following settings:
CW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100MHz
POWER LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9.0 dBm
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
dBm
*2.00
dB
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 dBm kO.03
dB at 100 MHz.
8. On the synthesized sweeper, press
cm]
LEVELING and adjust
the ENTRY knob (REF in
dBV
with ATN: 0
dB)
for a power meter
indication of -10.00 dBm
f0.03
dB
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 dBm power level at 100 MHz.
9. Set the synthesized sweeper to the following settings:
START
...................................... 10MHz
STOP
.....................................
1500 MHz
SWEEP TIME .................................... 40s
SWEEP .....................................
SINGLE
10. Set HP
8568B
LINE switch to ON and press (INSTR PRESET].
11. Key in (START FREQ) 10 MHz,
[sTopI
1500 MHz,
(REFERENCE LEVEL) -10 dBm, LOG CENTER
dB/Div]
1
dB.
12. On the spectrum analyzer, press TRACE A, (CLEAR WRITE), and
(NlAXHOLD).
13. Trigger two full sweeps on the synthesized sweeper.
3-134 Adjustments