Duplex Test (Fm/Am-1200S Only) - IFR FM/AM-1200A Operation Manual

4-7-9 DUPLEX TEST (FM/AM-1200S ONLY)
EXAMPLE: Testing a Duplex transceiver
UUT XMT FREQ
=
157.77 MHz
UUT REC FREQ
=
152.51 MHz
STEP PROCEDURE
------------------------------------------------------------------------
1. Place MODE Selector Control (39) to "DUP" position.
FUNCT
and
~
2.
2ND
Enter:
1!!!11
until VFD displays:
IIII:!ule!LIE/xl !HirlsiHI I I I I Il l
Press:
~
VFD will display:
3.
Enter~
1•.11•1
~
1•1
[•ii•i
(UUT XMT Freq)
~
10PS OPT
~
• DVM DVM
OFFSET
=
152.51 MHz (UUT Rec Freq)
=
157.77 MHz
(UUT XMT Freq) (OFFSET
=
-5.26 MHz)
4. Enter:
4-43c
05
Use
~~~
Key until (-) sign appears in front of offset frequency.
[NOTE!
A generated RF frequency of 152.51 MHz with a 5
kHz deviation
@
-15 dBm (±10 dB) (DUPLEX HIGH
mode) or -40 dBm (±15 dB) (DUPLEX LOW mode) is
present at the DUPLEX Output Connector (14).
T/R Connector (11) will receive an RF frequency
of 157.77 MHz. A signal of 152.51 MHz with a 5
kHz deviation
@
-85 dBm (±10 dB) is also present
at the T/R Connector (11).