Horizontal Deflection System Check; Check Horizontal Linearity; Check High-Frequency Timing - Tektronix 7623A Instruction Manual

Performance Check--7623A/R7623A Service
C. HORIZONTAL DEFLECTION SYSTEM
Equipment Required:
1. Signal Standardizer
2. Time-base unit
3. Amplifier unit (2 identical)
4. Time-mark generator
5. Low-frequency signal generator
6. 50-ohm BNC cables (2)
Control! Settings
Preset the 7623A controls as follows:
INTENSITY Midrange
VERT MODE LEFT
TRIG SOURCE VERT MODE
Display Selection NON STORE
1. Check Horizontal Linearity
a. Install the signal standardizer in the horizontal compartment and a time-base unit in the
left vertical compartment.
b. Set the signal standardizer Test switch to Vert or Horiz + Step Resp and adjust the Amplitude
and Position controls for a centered, two-division display.
c. CHECK—That thereis 0.1 division, or less, compression or expansion when the trace is positioned
anywhere within the graticule area.
d. Remove the plug-in units.
2. Check High-Frequency Timing
a. Install an amplifier unit in the left vertical compartment and a time-base unit in the
horizontal compartment.
b. Connect the time-mark generator to the input connector of the amplifier unit.
c. Set the time-mark generator for one-millisecond markers and set the deflection factor of the
amplifier unit so the markers are at least two division in amplitude.
d. Set the time-base unit for auto, internal triggering at a sweep rate of one millisecond/division.
e. Pasition the first marker to the left vertical line of the graticule.