Power Level, Attenuation Control, Amplitude Modulation; Source<1|2>; Attenuator<0.0|0.5|1.0; Source <1|2>; Plevel <0|1|2|3; Source <1|2>; Oen <0|1|2 Or Off|On - Valon 5009a Operation Manual

4.9 Power Level, Attenuation Control, Amplitude Modulation

Source<1|2>; ATTenuator<0.0|0.5|1.0|...31.5>
4.9.1
Relative power output control from the selected source using the internal attenuator. The
attenuator has a range of 0dB to 31.5dB in 0.5dB steps.
Att? returns the value of the attenuator.
Source <1|2>; PLEVel <0|1|2|3>
4.9.2
Relative power control from the selected source using the output amplifier and can also be used
to adjust the output power level. Typically, the power control can be used to trim the output of
synthesizer level depending on frequency of operation.
Source <1|2>; OEN <0|1|2 or OFF|ON>
4.9.3
Enables or disables the RF output buffer amplifiers while leaving the synthesizer PLL locked.
This command does not completely extinguish the RF output signal level but reduces the level
by approximately 50dB. This command can be used with the attenuator command to reduce
the output level by 80dB. ON turn the buffer amplifiers on. (OEN is automatically set to off if
the power supply voltage rises above 8.0V. Note this function is logically AND of LOCK, so the
buffer amplifier will only be enabled if LOCKed.
Source <1|2>; PDN <0|1>
4.9.4
PDN is a complete power down of the active source. The internal control register will retain the
data however. PDN 0 turns the source off, PDN 1 turns the source on.
Source <1|2>; AMDepth<0|0.5|1.0|..31.5>
4.9.5
Enables 50% duty cycle square wave amplitude modulation of selected source. The default
modulation rate is 1 kHz. The AM modulator uses the attenuator function so the modulation
on/off ratio is determined by the setting of the attenuator. AM is accomplished by switching
the attenuator from its set value to ± the AM value. For example if the RF attenuator was set to
15dB, and the AM modulation was set to 10dB, then the RF attenuator would switch from 10dB
to 20dB at the modulation Rate.
AM is enabled when the AMDepth is set to any value other than 0(dB). For example; to turn on
20dB modulation at 1 kHz the command would be AMD 20.
Source <1|2>; AMFrequency <f>
4.9.6
Sets the AM modulation frequency to and value from 1Hz to 10kHz in 1 Hz increments.
Valon Technology 5009a Operations Manual – Version 1.38 Page 30