DATA PRECISION 5740 - Programmable Divider and Decimal Point Control Check; Intercycle Oscillator and Control Check

72-1002
Model 5740 COUNTER
GENERATOR
125 HZ OdBm
—r
MODEL 5740
(3)
ATTEN = x1
TRIGGER = Center
50-OHM LOAD (IF NEEDED)
PERIODS AVGD
PERIOD (used DISPLAY
TROUBLE-SHOOTING COMMENTS
1000
8000.000
Checks Input Conditioning Ckt
100
08000.00 +1
Checks Decimal Point
10
008000.0+1
&
1
0008000 +2
Programmable Divider
Fig. 4-5. Input Signal Conditioning & Decimal Point Test Sequence
GENERATOR
100 000 HZ
50-OHM LOAD (IF NEEDED)
MODEL 5740
SIG GEN
MODE L5740
TROUBLE-SHOOTING
OUTPUT LEVEL
ATTEN TRIGGER
FREQ DISPLAY COMMENTS
0 dSm Xl Center
00100.00+1
-27 dBm
x1
Adjust
00100.00+1
-27 dBm
x20 Adjust
0 or Miscount
Checks ATTEN
0 dBm
xl
Full CW 0 or Miscount
8 dBm xl
Full CW 00100.00+1
Checks plus(+) TRIGGER
0 dBm xl
Full CCW 0 or Miscount
8 dBm xl
Full CCW 00100.00 +1
Checks minusi—) TRIGGER
' 100 msec GATE Time
4.9 PROGRAMMABLE DIVIDER AND DECIMAL
POINT CONTROL CHECK (FIG. 4-7)
4.9.1 Set-UP
Model 571+0
Mode Switch (84):
Rotary Switch (S3)
Signal Generator
See Figure 4-7
4.9.2 Procedure
SEC/FREQ
See Figure 4-7
Position Rotary Switch (S3) and vary
the Signal Generator output as shown for
each step in Figure 4-7. Verify output
reading according to value in table of
Figure 4-7. Observe output at TPS with
oscilloscope to isolate malfunction to
programmable divider or COUNTER -• ■-
DISPLAY chain.
4.10 INTERCYCLE OSCILLALTOR AND
CONTROL CHECK
4.10.1 Set-Up
Model 5740
Mode Switch (34): SEC/FREQ
Rotary Switch (S3): 100msec GATE
TIME
4.10.2 Procedure
Follow procedure outlined in Figure 4-8
to trace waveform generation through to
signals at TPl and TP2. Refer to Chapter
3 and reference schematic drawing.
4-6
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