1730–Series Checks and Adjustments
5–15
shows the location of R856. Connect a 0 to +10 V, 2 kHz square wave
to the bnc connector of the Parade Display Test Connector, as shown in
the equipment list.
h. CHECK – that 7.6 to 10.4 divisions of deflection have been added by
the square wave.
8. Check 90/100 Hz Triggering
REQUIREMENT – 90 Hz, ±15% (100 Hz, ±15%).
a. Connect the function generator output through a dual input coupler and
an in–line 75W terminator to the 1730–Series CH–A INPUT.
b. Set the function generator for a 90 Hz (100 Hz PAL) 2 V p–p square
wave.
c. Install the bnc to alligator clip adapter on the remaining side of the dual
input coupler.
d. Install the 90/100 Hz sub–miniature D–connector on the 1730–Series
REMOTE connector. See Fig. 5-2.
e. Connect the alligator clip from the center connector (red) to pin 10 of the
sub–miniature D–connector adapter.
f. Move the jumper for J540 (90/100 Hz Enable) to the 1–2 position. See
Fig. 5-7.
g. Move the jumper for J635 to the negative position (2–3). See Fig. 5-7.
h. Select 2FLD SWEEP.
i. Set the 1730–Series VAR GAIN for a 1 V p–p square wave, 90 Hz
output (100 Hz PAL).
j. CHECK – that the display remains stable (although sweep length
varies) while varying the generator from 76 to 104 Hz (85–115 Hz PAL).
k. If 90/100 Hz triggering is not going to be used, move the jumpers on
J540 to the 2–3 position and J635 to the 1–2 position.
l. Remove the adapter from the 1730–Series rear–panel REMOTE
connector.
9. Check Vertical Gain and X5 Gain Registration
REQUIREMENT – Gains within 1% for both CH–A and CH–B INPUT. X5
gain within 5%. Input signals between 0.8 and 2 V can be adjusted to full–scale
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