IFR COM-120B Service Manual

-8-5
DISTORTION
METER
PREREQU ISITES:
EQU
IPMENT
REOUIRED:
FIG
U
RES:
CALIBRATION
1-8-1
POWER
SUPPLY CALIBRATION
'l
AA
AUDIO ANALYZER
AUDIO/DATA
Figure 1-4
Distortion/SINAD Meter Test
Equipment
Setup
STEP
PROCEDURE
1. Apply Power
to
COM-1208.
Allow
5
minute warm-up
period.
2. Connect
Test
Equipment
as shown
in Figure
1-4.
3.
Press
AUDIO
GEN
lnstruments
Key
(
).
4.
Set
Audio
Generator 2
to ON.
5.
lf
Optional
Audio
Generator 2
is installed,
set
Tone
Frequency tor 1000.0 Hzand
Shape to
S'NE.
6. Set
Audio
Generator 2 Level tor 1.41 Vp.
7.
Set
Audio
Generator
1
to OIV.
8. Set
Audio
Generator
1 Format
to
TONE.
9. Set
Audio
Generator
1 Tone
Frequency
to
2800.0
Hz.
10.
Set
Audio
Generator
1
Shape to
SINE.
11.
Set
Audio
Generator 1 Level
to 0.14
Vp.
12.
Set
Audio
Generator
1
Mode
to CON]..
coM-1208
(1e)
(14)
AUDIO
ANALYZER
AUDIO/DATA GEN
1 1A
t-t+
1-8-5
DISTORTION METER CALIBRATION
PREREQUISITES:
1-8-1 POWER SUPPLY CALIBRATION
EQUIPMENT REQUIRED:
AUDIO ANALYZER
FIGURES:
1-4
COM-120B
AUDIO ANALYZER
(19)
(14)
AUDIO/DATA IN
AUDIO/DATA GEN HIGH IMP EDANCE
INPUT
00603001
Figure 1-4 Distortion/SINAD Meter Test Equipment Setup
STEP
PROCEDURE
1. Apply Power to COM-120B. Allow 5 minute warm-up period.
2. Connect Test Equipment as shown in Figure 1-4.
3. Press AUDIO GEN Instruments Key (4).
4. Set Audio Generator 2 to ON.
5.
If Optional Audio Generator 2 is installed. set Tone Frequency for 1000.0 Hz and Shape to
SINE.
6. Set Audio Generator 2 Level for
1.41 Vp.
7. Set Audio Generator 1 to ON.
8.
Set Audio Generator 1 Format to
TONE.
9. Set Audio Generator 1 Tone Frequency to 2800.0 Hz.
10. Set Audio Generator 1
Shape to SINE.
11 . Set Audio Generator 1 Level to 0.14 Vp.
12. Set Audio Generator 1 Mode to CONT.
1 -1 4
Scans by ArtekMedia © 2008

IFR COM-120B Specifications

General

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