IFR FM/AM-1200A

4-6-1 GENERAL
The FM/AM-1200S/A RF signal generator is capable of generating
calibrated amplitude signals within a range of 250kHz to 99g_9999 MHz,
in 100Hz steps. The signal generator can be used to stimulate external
devices by generating modulated or unmodulated signals, while the
FM/AM-1200S/A receiver is simultaneously monitoring the generator.
Modulation signals for the generated carrier are available from the
FM/AM-1200S/A internal tone generators or from external audio sources.
A microphone input connector is also available for applying voice modu-
lation. The generated signals are transmitted out the FM/AM-1200S/A
front panel T/R Connector (11), at an output level which is continuously
variable from -20 to -127 dBm (using RF Level Attenuator Controls (9)
and (10)).
Table 4-7 outlines the parameters of the generated output, which can be
monitored by the FM/AM-12005/A receiver circuits during generator opera-
tion.
SIGNAL CHARACTERISTICS:
Demodulated Audio
MONITORING DEVICE(S):
MODULATION Meter (1)
CRT (31)
(Oscilloscope)
VFD (37)
SPEAKER
CONTROL SETTINGS:
Modulation METER
Control (4) to
desired
"kHz/'XX10".
MODULATION Select
Control (3) as
required.
VERTICAL Attenu-
ator Selector
Control (24) to
kHz/%XlO position.
HORIZONTAL Sweep
Selector Control
(26) to mS/DIV or
!lS/DIV (FM/AM-
1200A only)
position.
Depress "2ND
FUNCT" and "METER''
Keys (in that
order.)
Volume Control
(40) as required.
Table 4-7 Receiver Monitoring Capabilities
of Generated Output
4 -3 5
02