Maintenance Section 5
5-27
5-82. Counter Plug-in Board Test. The period counter
can be tested using special function 31. In this test
sequence the counter is configured to measure the
timebase reference. The reference is divided in decade
increments from 1 to 10,000 in the period ranging circuits.
Each of the five frequency ranges is sequentially checked
for accuracy while the ANALYZER display indicates the
range being tested. The SOURCE display will indicate an
error code if a fault is evident on the tested range.
5-83. Input and Filter Plug-in Board Test. The Input
and filter plug-in boards can be tested using special
function 32. In this test sequence an external signal
source set to 1 kHz and 3.000 volts is required. The HI
and LOW inputs can be checked separately by enabling
the float mode and connecting the signal source to either
input. Each of the 13 level ranges is sequentially checked
to an accuracy limit of ± 0.5% while the ANALYZER
display indicates the range being tested. The SOURCE
display will indicate an error code if a fault is evident on
the tested range.
5-84. Notch And Detector Plug-in Board Test. The
Notch and Detector plug-in boards can be tested using
special function 33. In this test sequence an external
signal source set to 1 kHz and 3.000 volts is applied to the
Analyzer input. Each of the 13 post notch detector ranges
is sequentially checked to an accuracy limit of ± 1.0%
while the ANALYZER display indicates the range being
tested. The SOURCE display will indicate an error code if
a fault is evident on the tested range.
5-85. PREPARATION FOR SHIPMENT.
5-86. Use of Shipping Case or Containers. If the
original shipping case or container was saved, pack the
Model 1121A as it was received.
5-87. Packaging. When using packing materials other
than the original, use the following guidelines:
a. Wrap the Model 1121A in polyethylene sheeting.
b. Select a double wall cardboard container. Inside
dimensions must be at least 6 inches greater than the
equipment. The carton must meet test strength require-
ments of >275 lbs. (124.7 kg).
c. Protect all sides with shock-absorbing material to
prevent equipment movement within the container.
d. Seal carton with approved sealing tape.
e. Mark carton “FRAGILE” on all sides, top, and
bottom of shipping container.
5-88. STORAGE.
Pack the Model 1121A in the shipping container.
Maintain storage temperature range of -4 to 140°F (-40 to
71°C) at 75±5 relative humidity.
TABLE 5-23. DIAGNOSTIC ERROR CODE DESCRIPTION.
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