IFR COM-120B Service Manual

1-8-16 POWER METER
CALIBRATION
PREREQUISITES:
EQUIPMENT REQUIRED:
I
1
1
1
1
I
1
1-10
1.8.1 POWER
SUPPLY CALIBRATION
1-8-2 TCXO/OCXO
CALIBRATION
1O W
RF
AMPLIFIER
20
dB
ATTENUATOR
50 O TERMINATION
20O W RF AMPLIFIER
COAXIAL COUPLER
MEASURING
RECEIVER
SIGNAL
GENERATOR
FlGURES:
STEP
OUTPUT
COUPLED
MAINLINE
POWER
OUTPUT
Figure
1-10
Power Meter
Calibration
Setup
PROCEDURE
200 w RF
AMPLIFlER
SIGNAL
GENERATOR
lOWRF
AMPLIFIER
MEASURING
RECEIVER
COAXIAL
COUPLER
20 dB
ATTENUATOR
00603004
1.
Apply Power
to
COM-1208. Allow
5
minute
warm-up
period.
Press REC Test Mode Key
(3)
to
access
RF Receive
Operation Screen.
Set Receive
Operation Screen
Parameters
as follows:
RF Field
101 MHz
ln
put
T/R
Attenuation
0 dB
lF Bandwidth
300
kHz
2.
3.
4. Access Full
Screen RF Power
Meter.
1-45
1-8-16 POWER METER CALIBRATION
PREREQUISITES:
1-8-1 POWER SUPPLY CALIBRATION
1-8-2 TCXO/OCXO CALIBRATION
STEP
EQUIPMENT REQUIRED:
1
1
1
1
1
1
1
10 W RF AMPLIFIER
FIGURES:
1-10
20 dB ATTENUATOR
50 Q TERMINATION
200 W RF AMPLIFIER
COAXIAL COUPLER
MEASURING RECEIVER
SIGNAL GENERATOR
SIGNAL
GENERATOR
1----------
- ---,
I
I
COM-120B
(12)
I T/R
I
10WRF
AMPLIFIER
200 W RF
AMPLIFIER
I
INPUT I
OUTPUT
,.---'-- ____ -'-I-,COUPLED
COAXIAL
COUPLER
MAINLINE
POWER
OUTPUT
Figure 1-10 Power Meter Calibration Setup
PROCEDURE
1. Apply Power to COM-120B. Allow 5 minute warm-up period.
2. Press REC Test Mode Key (3) to access RF Receive Operation Screen.
3. Set Receive Operation Screen Parameters as follows:
RF Field
Input
Attenuation
IF Bandwidth
4. Access Full Screen RF Power Meter.
101 MHz
TIR
o dB
300 kHz
MEASURING
RECEIVER
20 dB
ATTENUATOR
00603004
1-45
Scans by ArtekMedia © 2008

IFR COM-120B Specifications

General

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