IFR COM-120B Service Manual

STEP
PROCEDURE
22.
Set
Tone Freq
to 10000.0
Hz.
23. Verify Modulation
Analyzer
reads
10 kHz Deviation (t600
Hz
+
residuat
[Step
20]).
tf not,
go
to
Step
45.
24.
Set
Tone Freq
to 15000.0
Hz.
25. Verify Modulation
Analyzer
reads 10
kHz Deviation (i600
Hz
+ residuat
[Step
20]). tf
not,
go
to
Step
45.
26.
Set
Modulation Analyzer
High-Pass
Filter
to
NONE
and Low-Pass
Filter
to
3
kHz.
27.
Set GENl
Modulation
Type
to OFF. Record Residual
on Modulation
Analyzer.
28.
Set GENl
Modulation
Type
to
FM.
29.
Set
Tone
Freq
lo
10.0
Hz.
30. Set
Deviation
for 100.0
kHz.
31.
Verify
Modulation Analyzer
reads 100 kHz
Deviation
(r5.5
kHz
+
residual
[Step
27]).
tf
not,
go
to Step
45.
32.
Set
Modulation Analyzer
High-Pass
Filter
to 300 Hz.
33. Set
GENl
Modulation
Type
to OFF. Record
Residual
on
Modulation
Analyzer.
34.
Set GENl
Modulation
Type
to
Fll.
35. Set
Tone Freq
to
1000.0
Hz.
36.
Verify Modulation
Analyzer
reads
100 kHz
Deviation
(15.5
kHz
+ residuat
[Step
33]). tf
not,
go
to Step 45.
37. Set Modulation Analyzer
Low-Pass
Filter
to
20
kHz.
38.
Set GENl
Modulation
Type
to OFF. Record
Residual
on Modulation
Analyzer.
39. Set GENl Modulation
Type
to FM.
40.
Set
Tone Freq
to l0 kHz.
41. Verify Modulation
Analyzer reads
100
kHz Deviation
(i5.5
kHz
+
residuat
tStep
3Bl). tf
not,
go
to Step
45.
42.
Set
Tone Freq
to
15000.0
Hz.
43. Verify
Modulation
Analyzer
reads
100 kHz
Deviation
(r5.5
kHz
+
residual
tStep
3Bl).
tf
not,
go
to Step 45.
44.
Set COM-1208
power
to
OFF
and disconnect test
equipment.
1-19
STEP PROCEDURE
22. Set Tone Freq to 10000.0 Hz.
23. Verify Modulation Analyzer reads 10kHz Deviation (±600 Hz + residual [Step 20]). If not,
go to Step 45.
24. Set Tone Freq to 15000.0 Hz.
25. Verify Modulation Analyzer reads 10kHz Deviation (±600 Hz + residual [Step 20]). If not,
go to Step 45.
26. Set Modulation Analyzer High-Pass Filter to NONE and Low-Pass Filter to 3 kHz.
27. Set GEN1 Modulation Type to OFF. Record Residual on Modulation Analyzer.
28. Set GEN1 Modulation Type to FM.
29. Set Tone Freq to 10.0 Hz.
30. Set Deviation for 100.0 kHz.
31. Verify Modulation Analyzer reads 100 kHz Deviation (±5.5 kHz + residual [Step 27]). If
not, go to Step 45.
32. Set Modulation Analyzer High-Pass Filter to 300 Hz.
33. Set GEN 1 Modulation Type to OFF. Record Residual on Modulation Analyzer.
34. Set GEN 1 Modulation Type to FM.
35. Set Tone Freq to 1000.0 Hz.
36. Verify Modulation Analyzer reads 100 kHz Deviation (±5.5 kHz + residual [Step 33]). If
not, go to Step 45.
37. Set Modulation Analyzer Low-Pass Filter to 20 kHz.
38. Set GEN 1 Modulation Type to OFF. Record Residual on Modulation Analyzer.
39. Set GEN 1 Modulation Type to FM.
40. Set Tone Freq to 10 kHz.
41. Verify Modulation Analyzer reads 100 kHz Deviation (±5.5 kHz + residual [Step 38]). If
not, go to Step 45.
42.
Set Tone Freq to 15000.0 Hz.
43. Verify Modulation Analyzer reads 100 kHz Deviation (±5.5 kHz + residual [Step 38]). If
not, go to Step 45.
44.
Set COM-120B power to OFF and disconnect test equipment.
1 -1 9
Scans by ArtekMedia © 2008

IFR COM-120B Specifications

General

Brand	IFR
Model	COM-120B
Category	Measuring Instruments
Language	English