First Time Operation - Tektronix 176 Instruction Manual

PER VERT DIV 10 times multiplication is indicated
Readout when Xl0 VERT button is pressed.
PER HORIZ DIV
None
Readout
PER STEP Readout 10 times multiplication is indicated
when 176 Xl0 STEP button is
pressed .
(3 OR gm PER DIV
None
Readout
CAM E RA POWE R None
Connector
Line Voltage None
Selector Assembly
(Rear Panel)
50 Hz-60 Hz None
(Rear Panel)
FIRST TIME OPERATION
When the 176 is received, it is calibrated and should
perform within the specification shown in Section 1. The
following procedure allows the operator to become familiar
with the 176 controls and their relationship to the Type
576. This procedure may also be used as a general check of
the instrument's performance. For a check of the instru-
ment's operation with respect to the specification given in
Section 1, the performance check procedure in Section 5
must be used.
1. Install the 176 in the Type 576. Press the Type 576
300 /1S PU LSED STEPS button.
2. Connect the Type 576 to a suitable power source and
turn on the Type 576.
3. Allow the instruments to warm up for a few minutes.
The instrument should operate within specified tolerances
five minutes after the Type 576 has been turned on.
4. Set the 176 controls as follows:
MAX PEAK POWER·WATT 100
Xl0 VERT Not illuminated
XlO STEP Not illuminated
INTERLOCK OVERRIDE Not pressed
®
Operating Instructions-176
5. Set the Type 576 controls as follows:
READOUT I LLUM Visible Readout
GRATICULE I LLUM Visible Graticule Line
INTENSITY Visible Display
FOCUS Centered
VERTICAL 50mA
DISPLAY OFFSET NORM (OFF)
Selector
CENTERLINE VALUE 0
HORIZONTAL 5 V COLLECTOR
Vertical Position Centered
Horizontal Position Centered
DISPLAY INVERT Released
MAX PEAK VOLTS 75
PEAK POWER WATTS Has no effect
VARIABLE COLLECTOR
Fully Counterclockwise
POLARITY
+
(NPN)
MODE
NORM
LOOPING COMPENSA- Has no effect
TION
NUMBER OF STEPS 10
CURRENT LIMIT 20mA
AMPLITUDE 0.5/1A
OFFSET ZERO
STEPS Released
PULSED STEPS 300/1S
POLARITY INVERT Released
STEP MULT .1X
Released
6. Select an NPN power transistor with the following
characteristics:
(3
Ie max
BVCEO
Between 20 and 50
Greater than lOA
75 V
Install the transistor in a suitable Test Fixture Adapter
(TO-3, TO-36 or TO-66) and install the adapter in the
Device Testing Jacks of the 176.
7. Put the protective box in place over the Test Fixture
Adapter and close the lid.
8. Press the Type 576 ZERO button and adjust the
spot to the intersection of the zero vertical and horizontal
graticule lines of the CRT. Release the ZERO button.
9. Turn the Type 576 VARIABLE COLLECTOR
SUPPL Y control clockwise to obtain a collector-emitter
voltage of 50 volts (10 divisions horizontally).
10. Set the Type 576 AMPLITUDE switch to 10 mA
and adjust the VERTICAL switch for a display similar to
2-5