Specifications
Linear-Reminder - Assisted Tune
The Linear-Reminder module measures the Gain of your amplifier and offers a
computer assisted tuning method. This last function mimics the alternative tuning method
offered by some high-end linear amplifiers generally called Nominal Gain tuning method. It is,
however, absolutely necessary to understand the principle before using it safety and with
efficiency.
These functions are only available if :
A digital wattmeter is set up (from Setup/TRX1 ) by using a serial port (OLE and Remote
not supported),
Your transceiver allows keying up/down (PTT) via CAT control,
The Monitoring window is open.
The following requirements are recommended but not mandatory:
Control of the Drive power by computer: if your transceiver does not support setting of
output power by computer, please take care to NOT change the power output between
sessions or measurements,
Operate/Standby controlby using a relay inserted in the PTT Line: if you don't use this
function (see Overview ), you will have to indicate the state of your amplifier by clicking
the OPR button according to the current state of the amplifier.
Settings
You must check the TUNE GAIN option from the Linear-Reminder's Settings dialog (LP-100
frame). However, if you don't use the functions below, it is recommended you do NOT check
this option.
Gain measurement
It is necessary to proceed as follow:
1) Memorizing the Drive power
The Drive power (without amplifier in line) has to be memorized for each Segment and each
Tune button:
1.
Disable OPR which opens the relay inserted in the PTT line (your amplifier is not in line),
2.
Perform a Tune at reduced power (Tune>) WITHOUT amplifier (or Tune F. if Tune> is
NOT available),
3.
The program switches LP-100 to Tune mode (T),
4.
Thanks to the digital wattmeter, the program measures the Drive power,
5.
Make sure the program stops the transmission automatically as soon as the measurement
is done (or stop the Tune manually),
6.
The program switches LP-100 back to Peak mode (W).
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