Tektronix 371B, Service Manual

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Performance Verification
5-20
371B Service Manual
Cal off mode is initiated by pressing the REF button while holding down the
SHIFT button.
11. Disconnect the digital multimeter from TP648 and TP80.
. The characteristics examined in this procedure are examples of typical
instrument operation to aid in the adjustment of R210; they are not specifica-
tions.
Equipment Setup.
Set up the equipment as shown in the following illustration and
set controls as described.
371B Settings:
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$& $#! %"
1. While pressing the cursor SHIFT button, set the 371B POWER switch to
ON. This displays the frame test pattern on the CRT.
Examining CRT Bias.
2. EXAMINE the CRT for the center spot to be barely visible. If the spot is
bright or not visible at all, the following adjustment may be necessary.
B2. Examining CRT Bias
Adjusting CRT Bias
(A20R210)