Agilent Technologies 8564EC, Service Manual

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80 Chapter 2
Adjustment/Diagnostic Software
To Use the Diagnostics
6. Select the PC board that includes the DAC of interest, then select
the DAC.
7. Use SELECT to set single values. (The default for entries is decimal,
but hexidecimal or binary can entered by appending either an "H" or
a "B", respectively. For example, "A2H" or "10100010B".)
8. Use ADJUST for continuous changing of the DAC value. Position the
arrow-tipped cursor to select the digit to be changed.
9. The UP, DOWN, and RAMP keys can also be used to exercise the
DAC.
Table 2-3 DAC Control Recommended Instrument State
DAC Reference
Designator Recommended Instrument
State*
Intensity DAC A2U212A State 1
Focus DAC A2U212B State 1
LOMA Power DAC A14U601A State 1
LOMA Gate Bias DAC A14U601B State 1
LOMA Sampler Power DAC A14U601C State 1
LOMA SBTX Power DAC A14U601D State 1
YTO Fine DAC A14U301A State 1
YTO Coarse DAC A14U301B State 1
YTF Slope DAC A14U409A State 1
YTF Offset DAC A14U409B State 1
SBTX Bias DAC A14U424A State 1
Sampler Amplifier Gate Bias
DAC A14U424B State 1
Main Coil Tune DAC A14U314 Refer to ”Check main coil tune DAC
(steps 47-49)” under ”Unlocked
YTO PLL” in
Chapter 11 . .
Scan Ramp DAC A14U316 State 2
Span DAC A14U315 State 2
Sweep Generator DAC A14U307 State 2
RF Gain A DAC A3U417A Refer to ”Flatness Control (RF
Gain DACs)” in
Chapter 8 .
*Refer to steps 1 and 3 of ”DAC Control” for spectrum analyzer state settings, unless
otherwise noted.