Chapter 2 99
Adjustment Procedures
10. Frequency Response Adjustment
Procedure
1. Connect the equipment as shown in Figure 2-15 on page 98. Do not
connect the HP 8482A Power Sensor to the HP 11667B Power
Splitter.
2. Zero and calibrate the HP 8902A/HP 8482A combination in log mode
(power levels read out in dBm) and connect the power sensor
through an adapter to the power splitter.
3. Place the WR PROT/WR ENA jumper on the A2 Controller assembly
in the WR ENA position.
4. Press
PRESET on the HP 8560E/EC and set the controls as follows:
Center frequency .............................. .........................10MHz
Span ....................................................... ..........................0Hz
Resolution BW ........................................................... 300kHz
Log/division ...................................................................... 2dB
5. Press
INSTR PRESET on the HP 8340A/B and set the controls as
follows:
CW ...................................................................... ........10MHz
Power level ................................................................. −4dBm
6. Set ref level cal DAC to zero. Press
CAL, REF LVL ADJ and use the
knob to set the value to 0. Press
STORE REF LVL.
7. On the HP 8560E/EC, press
MKR, CAL, MORE 1 OF 2, SERVICE CAL
DATA, then FLATNESS. The current value of the RF Gain DAC should
be displayed in the active function area. If the frequency displayed in
the active function area is not 10 MHz, press
⇓ or ⇓ until 10 MHz is
displayed.
8. Enter the appropriate Power Sensor Calibration factor into the HP
8902A.
9. Set the HP 8340A/B CW output to the frequency indicated in the
active function area of the HP 8560E/EC display. Adjust the HP
8340A/B POWER LEVEL for a −10 dBm reading on the HP 8902A.
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