R&S ESR Series User Manual page 502

®
R&S ESR
Table 8-2: Simultaneous modes of modulation (tracking generator)
Modulation
Frequency offset
EXT AM
EXT FM
EXT I/Q
● = can be combined
External AM
The
generator output signal.
The modulation signal is applied to the TG IN I/AM connector. An input voltage of 1 V
corresponds to 100% amplitude modulation.
Switching on an external AM disables the active I/Q modulation.
External FM
The
generator output signal.
The modulation frequency range is 1 kHz to 100 kHz, the deviation can be set in 1-
decade steps in the range of 100 Hz to 10 MHz at an input voltage of 1 V. The phase
deviation h should not exceed the value 100.
Phase deviation h = deviation/modulation frequency
The modulation signal is applied to the TG IN Q/FM connector.
Switching on an external FM disables the active I/Q modulation.
External IQ
The
tracking generator.
The signals for modulation are applied to the two input connectors TG IN I and TG IN
Q at the rear panel of the unit. The input voltage range is ±1 V into 50 Ω.
Switching on an external I/Q modulation disables the active external AM or FM.
Functional description of the quadrature modulator:
User Manual 1175.7068.02 ─ 12
Frequency offset
●
●
●
"External AM" on page 479 softkey activates an AM modulation of the tracking
"External FM" on page 479 softkey activates the FM modulation of the tracking
"External I/Q" on page 479 softkey activates the external I/Q modulation of the
Tracking Generator Functions
EXT AM EXT FM
● ●
●
●
Tracking Generator
EXT I/Q
●
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