Agilent Technologies 8360 L Series, Service Manual

Page: 291 / 603

Single Band Delay Compensation Adjustments.
If a drop in p o w er greater than 1.5 dB o ccurs when in single sw eep, increase the A dela y
term to put the A term at the high end of the p eak.
F or example, for the following calibration constan t v alues:
Start of the p eak = 1800
Middle of the p eak = 1950
End of the p eak = 2100
Set the A term to 2050
See Figure 3-16 for a graphic represen tation of the frequencies aected b y the calibration
constan ts.
Setting the F astest Sw eep Time.
Setting the sw eep time to 0 milliseconds sets the syn thesizer to the fastest sw eep time for
the frequency range b eing sw ept. Eac h time the frequency range is c hanged, the sw eep time
m ust b e reset to 0 ms in order to maintain the fastest sw eep time.
Sw eep Speed Related Adjustments.
Delay comp ensation and risetime adjustmen ts are aected b y sw eep sp eed. The adjustmen ts
are p erformed at fast sw eep sp eeds whic h are the w orst case. All other adjustmen ts are
p erformed at slow sw eep sp eeds; they are not aected b y sw eep sp eed.
If y ou ha v e a sw eep sp eed problem, it is probably aected b y dela y comp ensation or risetime
adjustmen ts.
YTF Bandcross Delay T erms.
The YTF Bx Dly terms are either oset or gain terms. A1 denotes the oset term for band 1.
B1 denotes the gain term for band 1. The oset (A) should b e adjusted to maximize p o w er at
the b eginning of the band. The gain (B) is adjusted to maximize p o w er tow ard the end of the
band.
See Figure 3-16 and Figure 3-17 for a graphic represen tation of the frequencies aected b y the
calibration constan ts.
3-34 Adjustments
Amplifier/Filter Adjustments
Agilent 8360