曝光臺 注意防騙 網曝天貓店富美金盛家居專營店坑蒙拐騙欺詐消費者

executable file "VMUTEST.EXE". The disk is
supplied as an accessory of the tester. Refer to
"3. VMU Tester Disk" for full data and
instructions.
T&FI-1
Personal Computer
(C/A)
IBM PC/AT or compatible system with:
· 1.44-MB 3.5-inch floppy disk drive
· Serial communications port COM1
· MS-DOS Version 3.1 or later, or Windows 3.1, 95
or 98 as operating system
· VGA color monitor
· Keyboard.
T&FI-1
RS-232 Null-Modem
Cable (C/A)
It connects the tester's RS232C I/F connector to
the COM1 connector of a personal computer. It must
have a 25-pin connector on the tester side.
T&FI-1
NTSC or PAL Video
Pattern Generator
(C/A)
This unit is necessary as a video source for the
modulation depth adjustment with the requirements
as follows:
· 50-W or 75-W output impedance
· 100% white raster (or other pattern that contains
100% white part)
· Color-bar pattern
· Variable output with a center value of 1 Vp-p
into 50-W or 75-W load.
T&FI-1
Spectrum Analyzer
(C/A)
It has a 50-W unbalanced input and is good for
measurement of VHF carrier signals from 100 to 110
dBmV (precision of ±0.3 dB or better) in level and
from 130 to 330 MHz in frequency.
T&FI-1
Page 903
Jul 20/2005
Panasonic Avionics Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
(Cont'd)
ITEM (SOURCE) DESCRIPTION EFF
NTSC or PAL Video
Monitor (C/A)
This unit receives the composite color video signal
from the VMU tuner and shows color pictures. The
input impedance must be 75 W (±1%).
NOTE: If you use your RF video receiving equipment
for VMU testing (Toshiba TT-GC9 or TT-GC10 TV
tuner, video cassette recorder, etc.), the
monitor must be the one that is connected to
your receiving equipment.
T&FI-1
VMU Tuner,
RD-AX8308-01
(Panasonic)
This unit tunes to one of the RF video carriers
from the VMU and makes demodulation of the RF video
(NTSC or PAL). It gives a calibrated video output
(1 Vp-p for 87.5% modulation) to measure and adjust
the modulation depth of the RF video signal. Refer
to Figure 102 for more data on the VMU tuner.
NOTE: As an alternative for this unit, you can use
your RF video receiving equipment (Toshiba
TT-GC9 or TT-GC10 TV tuner, video cassette
recorder, etc.) that you use for testing of
the VMUs. The video output of the RF video
receiving equipment must be calibrated with a
standard signal generator. The tolerance is
1 Vp-p ± 1% into a specified load (50 or
75 W) for an RF video input modulated 87,5%
with 100% white video.
T&FI-1
Oscilloscope (C/A) DC to 40 MHz, precision of ±3% for 1 Vp-p video
signal measurements.
T&FI-1
20-dB RF Attenuator
(C/A)
Type good for VHF applications, 50 W input impedance,
0.5 W or greater. It must give an attenuation of
approximately 20 dB for the VMU tuner.
T&FI-1
BNC 50-W Terminator
(C/A)
Three sets are necessary to give termination for
three RF outputs of the VMU. Each must be 0.5 W or
more in rating.
T&FI-1
RF Cable (C/A) BNC-BNC 50-W coaxial cable. Three sets are
necessary (RFC1 thru RFC3).
T&FI-1
Video Cable (C/A) BNC-BNC coaxial cable. Two sets are necessary (VC1
and VC2). The cable impedance can be 50 or 75 W.
T&FI-1
BNC Tee Adapter
(C/A)
Two sets are necessary (T1 and T2). T&FI-1
Monitor Cable (C/A) One set is necessary to connect the output (BNC) of
the VMU tuner to the input of the video monitor.
T&FI-1
Page 904
Jul 20/2005
Panasonic Avionics Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
(Cont'd)
ITEM (SOURCE) DESCRIPTION EFF
CPU Extension Card,
RD-AM9357-1
(Panasonic)
It connects to the A5 card and gives an extended
connection for the A1 card for fault isolation.
T&FI-1
Modulator Extension
Card,
RD-AM9357-2
(Panasonic)
It connects to the A5 card and gives an extended
connection for the A2 card for fault isolation.
T&FI-1
Power Extension
Card, RD-AM9357-3
(Panasonic)
It connects to the A5 card and gives an extended
connection for the A4 card for fault isolation.
T&FI-1
Volt-Ohm-
Milliammeter (VOM)
or Digital
Multimeter (DMM)
(C/A)
Use a VOM or DMM for continuity check and fault
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：COMPONENT MAINTENANCE MANUAL Video Modulator Unit (VMU)(90)