Chapter 4 _____________________________________________________ TTY Nonvolatile Setups
VAISALA______________________________________________________________________ 139
Chan A – 0:Unused, 1:FixedFreq, 2:TxWaveform : 1
FreeRunning fixed frequency : 60.00000 MHz
Output CW power level : 0.0 dBm
Apply pulse–to–pulse phase modulation: NO
Fixed relative phase offset : 0.000 Deg
Selects the type of waveform to generate on the Tx-A SMA output. In this
example a 60MHz fixed frequency CW sinewave is generated at 0.0 dBm
power level. The CW wave can optionally be phase modulated from pulse
to pulse, and can be offset by a fixed phase amount.
Chan B – 0:Unused, 1:FixedFreq, 2:TxWaveform : 2
Output power level: 0.0 dBm, Peak:YES
Apply pulse–to–pulse phase modulation: NO
Selects the type of waveform to generate on the Tx-B SMA output. Here,
a pulsed transmit waveform will be generated having a peak output level
of 0.0dBm. Phase modulation can optionally be applied. The details of the
pulse itself are defined in the Mt<n> menu for each pulse width (see
Section 4.2.5 Mt<n>— Triggers for Pulsewidth #n on page 117).
FM Chirp manual spectrum flattener: 0.00 %–per–MHz
Transmit waveforms generated by the IFDR are corrected for inherent
sin(f)/f amplitude-vs-frequency response of the TxDAC, resulting in a
flatter FM chirp waveform. In addition, this setup question lets you supply
adhoc frequency band compensation. The units of this parameter are:
percentage amplitude compensation per megaHertz of deviation from the
IF center frequency. Positive values result in a relative boost of higher
frequencies across the time span of the waveform. When the overall
frequency response of your Tx/Rx is not flat, you can tune this parameter
to null out the error based on feedback from either the Ps spectrum plot or
oscilloscope display of the Tx pulse.
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