8
6888882V04
1
kW PA LCD Functions
The LCD is used to display information on the operational conditions of the 1 kW amplifier, and
status information. The LCD comprises 2 rows, and therefore it is necessary to split the information on
four different display pages of 2 rows each.
The first row of each page always presents two items:
•
The current mode indicator,
RX
or
TX
•
The operating frequency, in MHz, as detected during the tuning process. The
frequency is measured with a resolution of 10 kHz, and therefore, if you need to know
the exact transmit frequency, always use the RM125/RM125R frequency display.
The information displayed in the second row changes with the specific page. To select a page, press
the DISPLAY MODE push-button display as required (scrolling is cyclical). The selected page remains
on display, until you select another page.
The information presented on each page is explained in Table 2. The pages are presented in the
order they appear when scrolling by means of the DISPLAY MODE push-button.
Table 2. 1 kW PA LCD Functions
No. Typical Page
Function
1
RX F:12.3456
FWD= VSWR=
Normal receive screen.
When transmitting (
TX
), the second row displays the forward (
FWD
) power in
watts, followed by the
VSWR
.
2
RX F:12.3456
FWD= REV=
Alternative screen: when transmitting, displays the forward (
FWD
) and reflected
(
REV
) power in watts.
3
RX F:12.3456
FAULTS=0 WARNING=0
Status screen (shown for receive –
RX
– mode). Displays the total number of
faults and warnings detected in the unit. If either number is not 0, the FAULT
indicator indicates the condition with the highest severity:
•
If the condition with the highest severity is a warning (
FAULTS
is
0,
WARNING
is not 0), the FAULT indicator flashes
•
If the condition with the highest severity is a fault (
FAULTS
is not 0), the
FAULT indicator lights steadily
4
RX F:12.3456
W: HIGH VSWR
Fault (
F
) or warning (
W
) screen: displays the fault and /or warning detected in
the unit. See list of messages that may be displayed in Table 3
Frequency appears only after successful tuning: before tuning, and
also in case the tuning fails, no frequency is displayed. For example:
RX F:-------
FWD= VSWR=
The forward and reflected power (or VSWR) values are automatically updated; fault and warning
information is refreshed only after scrolling again to the same page.
Note
The displayed value may fluctuate, according to the actual power measured at the instant
the display has been updated. As a result, in all the transmit modes except CW (which has
a constant modulation envelope), the displayed value depends on the instantaneous
modulation signal, and therefore may be lower than the selected nominal transmit power.
Protection circuits are reset after the PTT is released, but may be activated again if condition persists.
