Agilent Technologies 8590 Series Service Manual page 74

Making Adjustments
10. CAL YTF Adjustment Routine
1. Press the following keys to activate title mode.
2. Record the displayed "Optimum Bias" DAC values for each
Table 2-5 Acceptable Mixer Bias DAC Correction Values
Band
1
2
3
4
3. If the recorded "Optimum Bias" values are within the acceptable
4. Press the following keys to allow entry of the default mixer bias DAC
5. Enter CALMXRDATA 1600,1; as a title entry to set the mixer bias
6. Press the following keys to store the mixer bias value for band 1 in
74
PRESET
,
CAL, More 1 of 4 More 2 of 4
SERVICE DIAG
DISPLAY CAL DATA
frequency band.
Optimum Bias
_________________
_________________
_________________
_________________
ranges indicated in Table
necessary.
If the recorded "Optimum Bias" values are not within the acceptable
ranges indicated in Table
initialize the mixer bias DAC values.
values.
PRESET
, −2001,
FREQUENCY
DISPLAY
CHANGE TITLE
value to 1600 for band 1.
nonvolatile memory.
, ,
CAL More 1 of 4 More 2 of 4
SERVICE CAL
EXECUTE TITLE
2-5, RF section troubleshooting is
2-5, complete the rest of this procedure to
Hz
Acceptable
Bias Range
800 to 1900
0 to 200
1000 to 1800
400 to 750
Chapter 2