Specifications

Chapter 4 Retrofitting Options
Introduction
Assembly-Level Service Guide 191
• 1/4" spintight (Option 115 standoffs)
• 5/16" open-end wrench (SMA connectors)
•Long-nose Pliers
• 3/16" or 1/4" wide medium slot screwdriver
Do This First
NOTE Before performing any of the retrofit procedures in Chapter 4, the
following steps must be performed.
1 Turn Counter off.
2 Remove ac line power cord from the rear ac line socket.
WARNING HAZARDOUS VOLTAGES EXIST ON SOME INTERNAL
CIRCUITS OF THE COUNTER. AFTER DISCONNECTING THE
AC LINE POWER CORD, WAIT AT LEAST 6 MINUTES FOR THE
HIGH-VOLTAGE CAPACITORS TO DISCHARGE BEFORE
REMOVING THE COVER.
3 Except for factory-installed Option 010 (Ultra-high stability
timebase) and Option 150 (Pulse microwave measurements),
disconnect the Option 300 internal battery, if installed, as
described in each retrofit procedure.
4 To prevent Electrostatic Discharge (ESD) damage to the counter,
place the counter on a static-safe mat that is grounded to earth
ground.
CAUTION ESD damage caused by customer access to the internal circuits of
the counter without proper ESD protection may void the
instrument warranty.
5 Ensure that you are wearing a static-safe wristband that is
grounded to the mat and to earth ground.