P6330 3.5 GHz Differential Probe Instruction Manual 33

Theory of Operation

There are no user replaceable parts within the probe or the

compensation box; however, this theory of operation is provided to

assistyou inisolatingfailurestoeither theprobe orthe host

oscilloscope.Refer toFigure14fora simplified schematic of the

probe.

Offset
Gain
Offset
Zero
OffsetAmpifier
EEPROM
ProbeTip
Ampifier
SignalO ut
ProbeTip
±1VOffset
ProbeID Out
+5V
-- 5 V
Ground
Probe
Cable
TEKPROBE
Interface
ProbeHead CompensationBox Oscilloscope
ClockIn
+--
ProbeTip
+15V
Linear
regulator
+7V
IN +
IN --
+
-- in
--offset
+offset

Figure 14: Simplified schematic diagram