Operating Instructions; 7B53A/7B53An Features; General; Installation - Tektronix 7B53A Instruction Manual

Section 1- 7B53A/7B53AN
OPERATING INSTRUCTIONS
7B53A/7B53AN Features
T he 7853A and 7853AN Dual Time Base units provide
Main, Intensified, Delayed, and Mixed sweep operation for
TEKTRONIX 7000 ·$eries Oscilloscopes. Calibrated sweep
rates trom 5 s/DI V to 50 ns/D IV (5 nanoseconds w ith X 10
magnification) and triggering to 100 megahertz are
provided . T he 7853A and 7853AN are electrically identical
except that only the 7B53A is compatible with the
alphanumeric readout system provided for 7000-Series
Oscilloscopes.
Other features include 0 to 10 times continuous sweep
delay. vari able main and delayed sweep rates, and variable
main sweep hold off. Separate triggering controls are
provided for main and delayed sweep triggering, and when
operating in the A UTO MAIN TR IGGERING MODE, a
bright base l ine is displayed in the absence of a trigger
- r..
signal. The 7853A/7B53AN can also be used as an amplifier
for X-V operation .
General
The 7853A/7853AN operates with a TEKTRONIX
7000·Series Oscilloscope and a 7 A ·Series Ampl if ier unit to
form a complete o sci lloscope system. To effectively use the
7853A/7853AN its operation and capabilities should be
known . This section describes the operation of the front·
panel controls and connectors, provides an Operating
Checkout procedure, gives general operating information,
and basic applications f or this instrument.
Installation
The 7853A/7853AN is designed to operate in the
horizontal compartment of the indicator osci l loscope . This
instrument can also be installed in the Vert ical plug·in
compartment to provide a sweep that runs vertically on the
C RT . However. when used in this manner , there are no
retra ce b lank ing or internal triggering provisions. and the
unit may not meet the specifications given in Section 2.
The instruct ions in this manual are w ritten for use of the
7B53A/7853AN in the horizontal plug-in compartment.
®
Befo re proceeding with installation it is necessary to
check the settings of the Variable Selector multi-pin
connector
(p
140) and the Delayed Sweep Gate Out
multi·pin connector (P6 13). T he Variable Selector multi-
pin connector (P140) determines w hether the fro nt·panel
VAR IABLE control varies main sweep rates, delayed sweep
rates, o r main sweep holdoff; the Delayed Sweep) Gate Out
multi·pin connector (P6t3) determines whether the
Delayed Sweep Gate Out signal is connec ted to the
front·panel DLY'D TRIG IN connector (see Fig. 1-3). Refer
to General Operating I nstructions in th is section for
VAR IABLE control and OLY'D GAT E OUT inform ation .
To install the 7B53A/7853AN in a plug-in compart·
ment. push it in until it fits fi rmly into the compartment.
The Iront panel of the 7B53A/7853AN shou ld be flush
w ith the front panel of the indicator oscilloscope. Even
though the gain 01 the ind icator oscilloscope is stand ard ized
t o minimize adjustment when inserting plug·in un its, the
sweep calibra tion of the 7B53A/7B53AN should be
checked when insta lled . The procedure for checking the
unit is given under Sweep Calibration in the Operating
Checkout procedure in this section .
T o remove the 7B53A/7B53AN, pull the release latch
(see Fig. 1-2) to disengage the unit from the indicator
osci l loscope and pull it out of the plug·in compartment .
:t ... ,:;-
RELEASE . • •
~.,/
LATCH \ : .. ..
r"' "
TRIG"
"
AMP IN
OlY 'O
~
""
..... .
L
7B53A
~ __
D_U_A_L_T_'_M_E _ _
I
Fig. 1-2 . Loealion of releai18 latch .
,.,