Table of Contents
Advertisement
First type of the alarm is the most common SWR ALARM. But name of the alarm is probably the only thing what
SMΩRF has in common with other units. SMΩRF allows to set three different SWR values to trip three
importance levels (WARNING, ALARM, FAULT) for each band separately.
In addition, SMΩRF provides two power ranges where SWR can be handled separately, it allows to set
different SWR tripping values for an amplifier and different for bare transceiver. It is possible to set minimal
power level from where SWR value can trip alarm and ignore lower levels. It is also possible to turn some alarm
levels off. Lets take 160m band and screen shot as an example.
First power range is set to 10W – 180W, second power range for 180W and more. It means if output power will
be under 10W, no SWR alarm will be generated. For the first power range the WARNING level is turned off (---).
It means that if output power will be in between 10-180W, WARNING level will not be generated, but if SWR will
be larger than 2.5 or larger than 3.5, ALARM or FAULT level alarms will trip respectively.
For ALARM level, a pop-up window will be shown and audible alert will be played (DISPLAY = YES, SOUND =
YES). Alarm will be reset by releasing PTT (RESET = PTT).
For FAULT level audible alert won't sound (SOUND = NO) but pop-up window is forced despite being turned off
(DISPLAY = NO) because reset is set to MANUAL. In addition, SMΩRF breaks power generated by the radio (TX
BREAK = YES).
If output power will be higher than 180W, SMΩRF will generate ALARM and FAULT level alarms with the same
actions and reset conditions as above, but at different SWR values, ALARM at SWR >2.0 and FAULT at
SWR > 3.0. In addition it also generates lowest WARNING level alarm for SWR >1.8. When WARNING is
generated, pop-up window will be shown (DISPLAY = YES) without sound or breaking power (SOUND = NO, TX
BREAK = NO). Warning will be cleared automatically when SWR drops below 1.8 and after a 1s timeout (AUTO:
1s) without requirement to interrupt power (RESET = AUTO).
Of course all SWR, power values, actions and reset conditions are
adjustable. Easy to understand example values were chosen to
show that settings can fit everything from "I don't care about
alarms or one rule for everything above 3.0 is good for me" up to "I
need precise adjustments and rules for each band separately."
CONTROLS:
MINIMAL POWER for 1
1.
Sets minimal power for the 1
alarms will be generated for all three importance levels
WARNING, ALARM, FAULT. MIN settings sets power to
power threshold value.
2.
MINIMAL POWER for 2
Sets minimal power for second range from where alarms
will be generated for all three importance levels
WARNING, ALARM, FAULT.
W-SWR
3.
Sets tripping SWR value for the WARNING level. Alarm
level can be disabled when set to ---.
4.
A-SWR
Sets the SWR value for the ALARM level. Value has to be
higher than the value set for the WARNING level.
5.
F-SWR
Sets the SWR value for the FAULT alarm level. Value has
to be higher than the value set for the ALARM level.
microHAM © 2015 All rights reserved
ALARM 1 MENU – SWR ALARM
st
POWER RANGE
st
power range from where
nd
POWER RANGE
1
2
60
3
4
5
Advertisement
Table of Contents
