A11 Jumper; Fm Input Impedance Jumper Locations - Agilent Technologies 83620A Service Manual

A. A11 Jumper
1. On the synthesizer, set the line power switch to standby.
2. Disconnect the coaxial cables from the A11 FM driver assembly.
3. Remove the A11 assembly from the synthesizer.
4. Locate the zero ohm resistor shown in Figure 3-37. he FM input
impedance is factory-set to the 50 ohm position. o change it to 600 ohms,
remove the resistor from the A11 assembly by unsoldering it. he FM input
impedance can be reset to 50 ohms by soldering the resistor back into the
A11 assembly.
If you will never use the 50 ohm setting, the resistor can be
Note
clipped out.
5. Reinstall the A11 assembly and reconnect the coaxial cables.
Figure 3-37. FM Input Impedance Jumper Locations
3-118 Adjustments
FM Input Impedance
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