TelePost LP-100A, Руководство по эксплуатации

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7
Operation Overview
Cont’d
Alarm (
Dn ) Button
The Alarm button is used to set the SWR alarm set point. There are 6 choices… OFF, 1.5, 2.0, 2.5, 3.0 & User. The User setting is
adjusted in Setup mode, and the programmed value is shown next to the word “User” on the display. Holding the Alarm button will
advance the choices every half second or so. Tapping the button will put the Alarm in “snooze” mode for a minute. Tapping again
during tuning will reset the function for another minute. The snooze mode allows adjusting an antenna tuner without the alarm going off,
but it returns to normal after tuning to protect the amplifier as intended.
Peak/Avg/Tune (
Up ) Button
This button provides two functions.
1) Short Tap (momentary)
– Cycles among the three power display modes… Average, Peak Hold and Tune.
----- Power Mode Indicator. W=Average, W=Peak, T=Tune (pulser)
In all cases, the bar graphs remai
n in fast attack mode, with decay that’s adjustable in Setup. The character after the numerical power
readout indicates which mode you are in. A “W” indicates peak mode, a “w” indicates average mode and a “T” indicates tune mode.
Average mode is best for taking accurate measurements with steady state signals, or for tuning an antenna tuner. Peak is best for CW
or SSB operating. Note: The Peak Mode is VERY fast, and can respond to a lip smack, mic button click, etc. Don’t be alarmed by this…
it is normal, and allows the LP-100A to provide an accurate indication of peak power. Unless a lot of compression is used, the peak
reading will occasionally be somewhat higher than the indication with a carrier… as much as 30% depending on the ALC attack time in
your rig, and power supply regulation of rig or amplifier. Tune mode is similar to Peak mode, except that the peak hold time constant is
set to 0.25 sec as opposed to the hold time set in Setup. The Average and Tune modes use the preset bargraph range in the setup
section, while the Peak mode shows a fixed 13 dB range. The Tune mode is designed mainly for tuning an amplifier using a pulser, and
uses a much longer decay to smooth out the pulses.
Peak/Avg/Tune (
Up
) Button cont’d
2) Long Tap (1/2 second) - Cycles a
mong the three dual coupler selections… Coupler 1, Coupler 2, Auto-Sense.
The dual coupler option must be installed for the selections to do anything. When in Auto-Sense, the LP-100A will display the data from
whichever coupler is receiving the most power. This is especially useful for SO2R operation, or when using a rig with separate HF and
6m outputs. The meter automatically applies the correct calibration table for the active coupler. Coupler models can be intermixed. A
little “arrow” next to the “SWR” text indicates which coupler is active (down for coupler 1, up for coupler 2).