HP 8153A - Page 210

Figure A-3. How to Remove a Module
1. Lift the catch at the bottom front of the module.
2. With the catch lifted, pull the module out of the instrument. If the module
does not slide out freely, check that you have lifted the catch high enough.
How to Fit a Module
Caution ■ Do not use the electrical or optical connectors to push the
module into the instrument, as this can cause damage to the
connectors.
■ Make sure that the line power is switched off before you fit a
module.
A Installation