Tektronix 3B5, Instruction Manual

Page: 6 / 187

Characteristics — Type 3B5
HORIZONTAL DEFLECTION SYSTEM
Characteristic Performance Requirement
Supplemental Information
Sweep Rates
Manual Mode
5
seconds/division to
10 nanoseconds/division
in 27 calibrated steps. Sweep rate indicated
on readout panel
Selected by front-panel MANUAL TIME/
DIV switch. Steps in 1-2-5 sequence
Seek Mode
5 seconds/division to 3.1 microseconds/divi-
sion in 24 calibrated sleps. Sweep rate indi ­
cated on readout panel
Automatically selected when seek com­
mand is received. Steps in 1-2-5 sequence
External Mode
5 seconds/division to 10 nanoseconds/division
in 27 calibrated steps. Sweep rate indicated
on readout panel
Selected by external program connected
to PROGRAM connector. Steps in 1-2-5
sequence
Sweep Accuracy (at 25° C, ±5°)
1s to 10 ns
Within ±3% of indicated sweep rate
VARIABLE control fully clockwise (UN­
CAL readout off) and DLY'D SWP MAG
switch set to OFF (MAG'D SWP readout
off). 10, 20 and 50 ns accuracy must be
checked in accordance with Performance
Check
5 s and 2 s
Within ±5% of indicated sweep rate
Variable Sweep Rate
Uncalibrated sweep rate to 2.5 times, or
greater, the indicated sweep rate. s/DIV read­
out turns off and UNCAL readout turns on
when VARIABLE control is not set to CAL posi ­
tion
Slowest sweep rate 12.5 seconds/divi ­
sion, or greater, in 5 s position
Sweep Length
DLY ’ D SWP MAG at OFF
10.3 to 11.3 divisions
Measured at 1 ms/DIV sweep rate
DLY'D SWP MAG on
12 to 15 divisions
Delayed Sweep Magnification Basic sweep rates between 5 s and 1 μs can be
magnified with the Dela yed Sweep Magnifier.
Calibrated DELAY control selects portion to be
magnified. Basic sweep rates between 5 s and
10 μs can be magnified 100 times; basic sweep
rates between 5 s and 1 μ s can be magnified
10 times
Readout panel indicates correct magni­
fied sweep rate
Magnified Sweep Accuracy
(at 25° C, ±5°)
1 S to 1 JUS Within ± 3% of sweep rate indicated on read­
out panel
VARIABLE control fully clockwise (UN-
CAL readout off)
5 s and 2 s
Within ±5% of sweep rate indicated on read­
out panel
Calibrated Delay Range
Continuous from 0 to 10 divisions from the start
of the trace
Delay Accuracy Within ±1.5% of fu l l scale at 1 ms/DIV.
Within ±3% of full scale at all other sweep
rates
Calibrated at 1 ms/DIV. Exclude first
0.2 division of display. Includes incre ­
mental DELAY dial linearity
Incremental DELAY Dial Linearity Within ±0.4% of full scale Exclude first 0.2 division of display
Delayed Sweep Magnifier Jitter 3 parts or less per 10,000 Equal to 0.3 division or less when meas­
ured with x1 00 magnification at 1 ms/
DIV basic sweep rate
Output DC Level
4-180 volts, ±10 volts
Beam positioned to CRT electrical center
SEEK MODE
Cycles Per Sweep Between two and six cycles with nominal
CYCLES/SWEEP setting obtained in Calibra ­
tion procedure
Automatically selected when seek com­
mand is received. Front-panel CYCLES/
SWEEP adjustment provides range of
about 0.5 to 3 times this nominal setting
Automatic Seek Cycling Time One to two seconds When seek command is continuous
Automatic Seeking Time 500 milliseconds or less with 10 MHz
sine wave input and Trigger Function
switch set to INT-AUTO
Frequency Range for Seek Mode
Operation
30 Hz to 20 MHz
Seek Mono Pulse Width 1.0 to 1.8 seconds
1-2