HP 8560E Service Manual

Chapter 2 81
Adjustment Procedures
5. DC Log Amplifier Adjustments
Procedure
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum
analyzer cover and place the spectrum analyzer in the service
position as illustrated in Figure 2-8 on page 84. See Figure 2-9 on
page 85 for adjustment location.
2. Connect the HP 3335A 50 Ω output to the HP 8560E/EC 50 Ω input.
Press
LINE to turn the spectrum analyzer on.
3. Set the HP 8560E/EC controls as follows:
Center frequency ..........................................................15MHz
Span ........................... ..............................................................0
Reference level ................. ...........................................−10dBm
Log/division .........................................................1Log/division
Resolution BW ................... ..........................................300kHz
IF Adjust.................................................................................off
4. Set up an HP 3335A as follows:
Frequency .................. ....................................................15MHz
Amplitude .............. .....................................................−18dBm
5. Press
CAL and ADJ CURR IF STATE, wait for the spectrum analyzer to
complete adjustments, then press
MKR.
6. Adjust A4R445 for maximum on-screen amplitude. Refer to Figure
2-7 on page 76 for the location of A4R445.
A4 Linear Fidelity Adjustment
This adjustment consists of adjusting A4R544 until the delta marker
reads −40 dB under the following conditions.
Procedure
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum
analyzer cover and place the spectrum analyzer in the service
position as illustrated in Figure 2-6 on page 75. See Figure 2-7 on
page 76 for adjustment location.
2. Connect the HP 3335A 50 Ω output to the HP 8560E/EC 50 Ω input.
Press
LINE to turn the spectrum analyzer on.
3. Press
PRESET, AMPLITUDE, LINEAR, MORE 1 of 3, AMPD UNITS, dBm,
CAL, and IF ADJ OFF.
4. Set the HP 8560E/EC controls as follows:
Center frequency ..........................................................15MHz
Span .................................................................................5MHz
Resolution BW ...................... .......................................300kHz
Reference level..................... .......................................−10dBm

HP 8560E Specifications

General

Brand	HP
Model	8560E
Category	Measuring Instruments
Language	English