2-9 Modulation Commands
Programming with GPIB Commands
2-24
PN: 10370-10374 Rev. F
MG369xC GPIB PM
Internal FM Function
The
FM7
command turns on the internal FM function in Unlocked Narrow mode, the
FM8
command turns it on
in Unlocked Wide mode, the
FM9
command turns it on in Locked mode, and the
FMN
command turns it on in
Locked Low-Noise mode. The FM deviation value is changed using the
FDV
parameter entry command.
The modulating waveform is selected using the
FWV(x)
command and the internal FM rate is set using the
FMR
parameter entry command. The
FM0
command turns off the FM function.
Programming Example:
Programming “
FM9 FDV 20 MH FWV1 FMR 100 KH
” turns on the internal FM function in Locked mode, sets
the FM deviation to 20 MHz, selects a sine wave as the modulating waveform, and sets the FM rate to 100 kHz.
External FM Function
The
FM1
(or
FMU
) command turns on the external FM function in Unlocked Narrow mode, the
FMW
command
turns it on in Unlocked Wide mode, the
FML
command turns it on in Locked mode, and the
FM2
command turns
it on in Locked Low-Noise mode. The external FM sensitivity value is changed using the
FMS
parameter entry
command. The
FM0
command turns off the FM function.
Programming Example:
Programming “
FMW FMS 50 MV
” turns on the external FM function in Unlocked Wide mode, selects the rear
panel FM input, and sets the external FM sensitivity to 50 MHz/V.
Phase Modulation
Two
M modes are available—Narrow and Wide. In Narrow
M mode, the maximum
M deviation is the
lesser of ±3 radians or ±5 MHz/rate for DC to 8 MHz rates. In Wide
M mode, the maximum
M deviation is
the lesser of ±400 radians or ±10 MHz/rate for DC to 1 MHz rates.
Internal
M Function
The
PH7
command turns on the internal
M function in Narrow mode and the
PH8
command turns it on in
Wide mode. The
PHD
parameter entry command is used to change the
M deviation value. The modulating
waveform is selected with the
PHV(x)
command and the
M rate is set using the
PHR
parameter entry
command. The
PH0
command turns off the
M function.
Programming Example:
Programming “
PH7 PHD 3 RD PHV1 PHR 200 KH
” turns on the internal
M function in Narrow mode,
sets the
M deviation to 3 radians, selects a sine wave as the modulating waveform, and sets the
M rate to
200 kHz.
External
M Function
The
PH1
(or
PHN
) command turns on the external
M function in Narrow mode and the
PH2
(or
PHW
) command
turns it on Wide mode. The external
M sensitivity value is changed using the
PHS
parameter entry command.
Programming Example:
Programming “
PH2 PHS 50 RV
” turns on the external
M function in Wide mode and sets the external
M
sensitivity to 50 radians/V.
Note
If the
M function is not installed in the signal generator, the
M function commands produce syntax
errors.
Summary of Contents for MG369 C Series
Page 2: ......
Page 6: ...Contents 4 PN 10370 10374 Rev F MG369xC GPIB PM ...
Page 262: ...A 34 PN 10370 10374 Rev F MG369xC GPIB PM ...
Page 264: ...Index 2 PN 10370 10374 Rev F MG369xC GPIB PM ...
Page 265: ......