Tektronix 1401A Instruction Manual page 12

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SECTION 2
OPERATING INSTRUCTIONS
Change information, if any, affecting this section will be found at the rear of the manual.
Introduction
This section of the manual describes installation and pro-
cedures pertinent to operating the 1401A. It covers
function of the controls and connectors, hookup to a
companion oscilloscope, battery care, operational pro-
cedure for familiarization and some examples of instrument
Standard accessories that are included with the 1401A
are listed near the back of the manual. The following
describes the purpose of items that are not self explanatory.
Panel Cover. A friction fit keeps this cover over the
front panel during storage or transporting. The cover can be
placed over the rear of the 1401A for storage when the
1401A is in use. The recess in the cover accommodates the
accessory pouch strap, and should not be used as a finger
Accessory Pouch. This pouch grips to the handle pivots
and the cover securing screw at the rear panel. It has
sufficient capacity to hold the standard accessories, inclu-
ding the Operators Handbook, with the exception of the
standard manual and the Panel Cover.
Strap Assembly. The strap is designed to snap into place
for transporting the instrument. It can be used to suspend
the 1401A in front of, or alongside, the operator during -
use. The handle can be extended between the operator and
the 1401A, to obtain optimum viewing positions.
BNC to BNC Cable Assemblies. Two short cables are
used to connect the 1401A VIDEO OUTPUT and the
SWEEP voltage to the Vertical Input and Ext Horiz Input
of a companion oscilloscope. A third short cable is used to
patch the Calibrator output into the INPUT connectors.
The 6 foot coaxial cable is used to connect the signal source
to the RF INPUT connector on the 1401A. Cable loss
increase with frequency and at 500 MHz the loss is about 1
Operators Handbook. Designed to fit in your shirt
pocket and use as an on-site reference document. Includes
®
prime characteristics, operating instructions, and some
applications.
Installation
The 1401A is designed to use with a portable oscillo-
scope, such as Tektronix Type 323 or 324. It can, however,
be used with any oscilloscope that has an external hori-
zontal input or access to the horizontal sweep voltage.
Interconnections between the 1401A and companion oscil-
loscope are illustrated in Fig. 2-4 along with control
settings. Compatibility with Tektronix portable oscillo-
scopes is covered near the end of this section.
Refer to "Sweeping the Companion Oscilloscope",
under General Operating Information for additional infor-
POWER SOURCE AND APPLICATION
The 1401A requires either an internal power pack or an
external (+6 V to +16 V) DC source for power. The power
pack consists of a battery and a charging circuit. The
charging circuit operates from AC line voltage, to charge
the battery or maintain a given charge level after it has been
charged. When fully charged, the battery pack will supply
the 4.5 watts required by the 1401A and maintain this
power output for approximately 3.5 hours operation.
As previously stated, the charging circuit in the power
pack operates from either 115 V or 230 V nominal AC
power. Slip-on connectors, on the power pack, are used to
wire the charging circuit for the voltage to be used. Hookup
illustrations and instructions are given in Fig. 2-1. Battery
charging occurs whenever AC power is applied to the AC
receptacle on the power pack. Charging rate (FULL CHG or
TRICKLE CHG) is selected by a three position switch on
the back panel of the power pack. Usually the battery is
fully charged at the FULL CHG rate, then maintained at
this charge level by switching the selector to TRICKLE
CHG position. TRICKLE CHG supplies sufficient current
to maintain the battery in full charge condition, plus the
required power to operate the 1401A. Battery charging is
described under Battery Care. The 1401A will not operate
from an AC source if the batteries are missing or defective.
The battery can be charged with the power pack out of
the instrument. Extra power packs can therefore be charged
to serve as spares if desired.
2-1