Operation; Introduction; Panel Features; Signature Display - HP 5004A Operating And Service Manual

INTRODUCTION

3-2. This section explains the functions of the operating controls, indicators, probe, and test
connectors of the 5004A Signature Analyzer. An operator's self-test is given, and the normal
operating modes are described.

PANEL FEATURES

3-4. Front panel features of the Signature Analyzer are described in Figure 3-7. This figure
contains a detailed description of the controls, connectors, and indicators.
3-6. t h e 5004A Signature Analyzer presents digital signatures with a four-character,(symbol)
display on its front panel. Each character, which can be any one of 16 symbols, is shown on a 7-
segment light-emitting-diode display 10 by 7 millimetres. The 16 possible characters are:
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3-7. The characters presented on the display are a hexadecimal number which is the residue
of a count in the 5004A after a START and a STOP signal have been received with some data
bits in between.
No signature appearing on the 5004A display has any particular signif-
icance beyond being a correct (expected) signature or an incorrect
signature. The number is, however, a count residue in the 5004A con-
verted to and displayed in hexadecimal.

HEXADECIMAL NUMBER SYSTEM SYMBOLS (DIGITS)

3-9. The four-digit front panel display presents numbers in a special set of hexadecimal
symbols (see preceding paragraph). Note that the final six symbols are not the common hexa-
decimal symbols ABCDEF because the seven-segment display of the 5004A can not show a B
or D that would be different from an 8 or 0 respectively (and several other symbols could be
ambiguous).
3-10.

TEST TERMINAL GRABBER CONNECTORS

3-11. Five test-terminal grabber-connectors are supplied with the 5004A. ' T he grabbers are
push-on pull-off connectors. A grabber can be used on the end of the active test pod test leads
to make reliable electrical connections from the 5004A to the instrument being tested. Figure3-7
shows grabbers connected to the pod test leads. Figure 3-4 shows grabbers connected to a
device being tested. t h e removeable ground (common) test lead for the probe also has a grabber.
SECTION Ill

OPERATION

NOTE
Model 5004A
Operation
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