Specifications

4 Assembly Level Service Guide
Safety Notices
CAUTION
A CAUTION notice denotes a hazard. It
calls attention to an operating procedure,
practice, or the like that, if not correctly per-
formed or adhered to, could result in dam-
age to the product or loss of important data.
Do not proceed beyond a CAUTION notice
until the indicated conditions are fully under-
stood and met.
WARNING
A WARNING notice denotes a hazard. It
calls attention to an operating procedure,
practice, or the like that, if not correctly
performed or adhered to, could result in
personal injury or death. Do not proceed
beyond a WARNING notice until the indi-
cated conditions are fully understood
and met.
Safety Symbols
WARNING
Do not connect the input channels of the
53210A/53220A/53230A to AC line-volt-
age mains or to circuits derived from AC
mains. The instrument must be used in
CAT I (isolated from mains) applications
only. Do not use in other IEC Measure-
ment Category (CAT II, CAT III, or CAT IV)
applications. Failure to observe these
precautions may result in electric shock
and serious personal injury.
WARNING
The BNC shells of the input terminals are
connected to the instrument chassis.
Verify signal polarity before making any
connections to the input terminals.
Protection Limits
The Agilent 53210A/53220A/53230A 350
MHz Universal Counter provides protection
circuitry to prevent damage to the instru-
ment and to protect against the danger of
electric shock, provided the Protection Lim-
its are not exceeded and the instrument is
properly grounded. To ensure safe operation
of the instrument, do not exceed the Protec-
tion Limits defined on the front panel:
WARNING
During battery operation, the maximum
measured signal supplied by the user is
+
42V.
WARNING
Product Options 201/202 add parallel
Channel 1 and Channel 2 inputs to the
rear panel of the instrument. Signals on
the center conductor of either panel’s
channel BNCs are also present on the
corresponding center conductor of the
BNC on the opposite panel.
Installing the Instrument
The Agilent 53210A/53220A/53230A oper-
ates in the following line-voltage ranges:
100 - 240V, 50-60 Hz
100 - 127V, 440 Hz
90 VA Max
Instrument ventilation is through the sides
and rear. Do not obstruct the ventilation
holes in any of these locations.
Battery Operation
When operating the 53210A, 53220A or
53230A under battery power (Option 300),
failure to observe the following warnings
may result in damage to the instrument,
electric shock, and serious personal injury:
WARNING
Connect the instrument chassis to earth
ground during battery operation to mini-
mize shock hazard. Any interruption or
disconnection of the protective earth ter-
minal will cause a potential shock hazard
that could result in personal injury.
WARNING
Under battery power, the instrument
chassis may float to the potential of the
measured signal supplied by the user.
Chassis Ground
Refer to manual for additional
safety information.
Standby Power. Unit is not com-
pletely disconnected from AC
mains when power switch is in
standby position.
CAT I
IEC Measurement Category I. Do
NOT connect inputs to AC mains
or to circuits derived from AC
mains.
1 Watt Max into 50W
!
Channel / Setup