SERV I C E
MO D E L 3562A
8-56
3. If fu l l-span functions correctly but zoom mode fai l s on both channels, start trouble
shooting the LO Signal/Constant Select su bblock.
4. If freerun measurements operate correctly, but triggered measurements do not, start
troubleshooti ng the Trigger Control PAL (A6 U409) and the Start/Stop Control PLA
(A6 U309).
5. If all the DFA diagnostic tests ind icate no failure, yet the instrument sti l l has a problem
making a measurement, run the ADC diagnostic called DIGT AL TEST. This test provides
data to the DFA from the instrument front end, performs a measurement, and analvzes
the resu lts. This allows you to test the input data bit stream from the ADC boards.
The key strokes used to access this diagnostic are:
PRESET
RESET
SPCl FCTN
. . . . . . S E RVIC
TEST
. . . . . . TEST
I N PUT
A. DFA Diagnostics
. . . . . . ADC
. . D I GTAL
TEST
The diagnostic tests for the D igital Fi lter Assem bly al low you to test groups of circu its
to further isolate a prob lem. A su bset of the D FA diagnostic tests run when the nstru ment
power is tu rned ON, d u ring S E L F T E ST, and during TEST ALL. Display the DFA diagnostic
test menu using the fol lowing sequence of keystrokes:
PRESET
. . .
.
. . RESET
SPCl FCTN
. . . . . . S E RVIC
TEST
. . . . . . TEST PROC
. . . . . . TEST DFA
The menu now contains the fol lowing entries of DFA diagnostics:
DFA FU NCTN
F I LTER TEST
LOCAL BUS
DMA BUS
F I LTER BUS
DFA PATT 1
DFA PATT 2
Details of each test fo llow:
DFA FUNCTN
The DFA function test shou ld be used to test the overal l health of the digital filter assem bly
(AS
&
A6). Other diagnostic tests should be used to further isolate problems as described
in the following paragraphs.
Содержание 3562A
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Страница 213: ...r A1 a pQWERSuP PLY I 03562 66518 REV A REV 8 8MPOUT 58 58 FRONT REAR P ANEL ii O N ...
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Страница 237: ...Sample Clock SAMP DS DATA oe _ _ _ _ _ BUS NOTE FULL SPA BASi BAI MODE ...
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Страница 259: ...WRITEL A22L l cc E Vl 8 MHz A23L ASL Inverting A1L A21 L D rivers r ...
Страница 305: ...c c I O Sequencer S r J Sequence Decoder ...
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Страница 321: ... From Digital Source From Digital Source Serial Data Serial Data Sinewave Interface Front End Interface 3 S D D ...
Страница 324: ...EXT TRIGGER TRIG 1 TRIG 2 CALTRIG CNTLD COMI W CNTCLK LDTRGL RESETL ...
Страница 327: ... RH r I N EXT BUFFER SAMPLE _ _ _ IN ...
Страница 425: ...L_ FAULT ISOLATION Instrument Operational Figure 7 1 3 SELF TEST Sequence MODEL 3562A STOP Enter failure in r t be 7 61 ...
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