TM 11-5820-890-20-1
1.13.
TIME MANAGEMENT. Continued
When nets are inactive (net opening):
COLD START
FH sync time transmitted by ERF becomes the new base FH sync time at the receiving radio.
All clocks of the receiving RT are set to the new base FH sync time.
HOT START
FH sync time is entered manually via keypad or electronically by connection to an ANCD or PLGR.
When nets are active (net updates):
FH sync time transmitted by ERF replaces the FH sync time of the channel in which the ERF is stored.
The base FH sync time of the receiving RT is not altered.
1.14.
RT MAIN PANEL DISPLAYS.
RT-1523 through RF-15230
a.
General. There are three main panel displays.
b.
SIG Display. In the receive mode, the SIG display reads the relative strength of the received
signal. The stronger the RF signal, the higher the display will read. When transmitting, the SIG
display indicates the RF power output. In LO, the display lights bars 1-2, in M, bars 3-4,
and in HI, bars 5-6. In PA, all 6-7 bars of the SIG display light.
C.
RT Display. This display shows the operator indications susch as: the single channel
operating frequency, net ID, COMSEC key, data rate, battery life indication, and sync time.
Some versions of the RT indicate traffic on the net by placing an M in the display. When a FAIL
message is displayed, there is a failure in the RT.
d.
HUB Display. The HUB is used to retain internal memory when the RT is in standby operation
and when the main power or main battery fails or is removed. The HUB display flashes on and
off when HUB power is low and remains on continuously when the HUB is spent or removed.
RT-1523E
a.
General. The RT-1523E has a single front panel LCD display. It has a backlight which can be
turned on and off from the keypad. It is organized in three regions.
b.
Right Side. At the right side are two indicators: the top one is a dot which indicates power is
present and the bottom one is “WHSP” when the whisper mode is activated.
C.
Top Row. There are five indicator accross the top from left to right: a vertical bargraph signal
strength meter, a transmit power level setting indicator, a FH mode indicator, a channel
indicator and a COMSEC mode indicator.
d.
Bottom Row. A second row consists of a 13-character free-text region which displays
operator indications such as: the single channel operating frequency, net ID, COMSEC key,
data rate, battery life indicator, and sync time. It also displays a menu for setting volume,
channel, power level, FH mode, and COMSEC mode.
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