IFR FM/AM-1200A

~~AUTION\
DO NOT TRANSMIT INTO DUPLEX OUTPUT CONNECTOR
(14); CONNECTOR IS NOT PROTECTED AGAINST RF
INPUTS ABOVE 0.25 WATTS.
B. "OFF-THE-AIR" DUPLEX TESTING
c .
In this mode, the output of the UUT transmitter is monitorerl
''off-the-air'' at the FM/AM-1200S ANT Connector (34), while
the FM/AM-1200S offset generator output (available at the
Duplex Output Connector ( 14) or T/R Connector ( 11)) is applied
to the UUT receiver input.
[~~UTION\
DO NOT TRANSMIT INTO ANTENNA CONNECTOR (34):
RF INPUTS IN EXCESS OF 0.25 WATTS MAY CAUSE
DAMAGE TO FM/AM-1200S.
DUPLEX TESTING USING COMMON TRANSMIT/RECEIVE LINE (HALF DUPLEX
OPERATION)
When testing a duplex transceiver with a single transmit/receive
I/0 port, a common receive/transmit line is connected between the
UUT RF I/0 port and the FM/AM-1200S T/R Connector (11).
f~!UTION\
DO NOT TRANSMIT INTO DUPLEX OUTPUT CONNECTOR
(14); CONNECTOR IS NOT PROTECTED AGAINST RF
INPUTS ABOVE 0.25 WATTS.
\NOTE\
The offset transmitted out the DUPLEX Output
Connector (14) of the FM/AM-1200S is at -15 dBm
(±10 dB) in the DUPLEX HIGH mode or -40 dBm (±15
dB) in the DUPLEX LOW mode.
The offset transmitted out T/R Connector (11) is
a fixed -85 dBm (±10 dB) level.
The RF frequency entered in the FM/AM-1200S is
the UUT transmit frequency. OFFSET = UUT
receive frequency minus UUT transmit frequency.
(OFFSET can be(-) negative.)
4-43b
05