Agilent Technologies 8564EC Service Manual page 102

3. Press ,
PRESET CAL
.
STATE
4. Set the spectrum analyzer controls as follows:
Center frequency .................................................... 15 MHz
Span ................................................................................... 0
Resolution bandwidth ........................................... 300 kHz
Reference level ...................................................... −10 dBm
5. Set up an 3335A as follows:
Frequency ............................................................... 15 MHz
Amplitude ............................................................. −10 dBm
6. Press ,
MKR MARKER DELTA
7. Decrease the 3335A power to −26 dBm.
8. Calculate the error: EQUATION {\rm Error} = {\rm delta\ marker\
reading}-{\rm 16\ dB} EQUATION.
9. If the error is less than ±0.2 dB, no adjustment is necessary.
10.Set the 3335A power to −10 dBm.
11.Adjust A4R531 (see
read two times the error. For example, if the calculated error is
+0.75 dB, adjust A4R531 for a delta marker amplitude reading of
+1.5 dB. Press
CAL
12.Repeat steps 7 through 11.
Chapter 3
, (OFF),
IF ADJ ON OFF
on the spectrum analyzer.
Figure 3-10, "DC Log Adjustment
, .
ADJ CURR IF STATE
Manual Adjustment Procedures
3. DC Log Amplifier Adjustments
ADJ CURR IF
Locations,") to
125