Specifications
Table 2. RM500 Front Panel Indicators (Cont.)
Indicator Function
TEMP Amplifier overheat indicator: lights when the internal temperature is too high. Usually, this occurs
when the air intake or exhaust vents are accidentally obstructed, prolonged exposure to direct
sun radiation, or excessive ambient temperatures.
• If the FAILURE indicator flashes while TEMP lights but BYPASS is off, the 500W amplifier
continues transmitting at half power
• If the FAILURE and BYPASS indicators light together with TEMP, the 500W amplifier has
switched to the bypass mode
VSWR Excessive VSWR indicator: lights when the 500W amplifier is in the transmit mode to indicate
that the antenna VSWR exceeds the maximum allowed. This may be caused by a disconnected
feed cable, an improperly installed or incorrectly tuned antenna, or as a result of damage to the
antenna or to its feed cable
FAILURE PA failure indicator:
• Lights when a critical fault in the 500W amplifier section prevents its operation. In this
case, BYPASS also lights, to indicate that the 500W amplifier is bypassed
• Flashes when an operational problem, for example, high temperature, excessive drive
power or excessive VSWR activates the corresponding protection circuits
TX Transmission mode indicator: lights when the 500W amplifier operates in the transmit mode
BYPASS Bypass mode indicator: lights when the 500W amplifier is bypassed. The amplifier is normally
bypassed when the radio is in the receive mode. It is also bypassed when a fault or abnormal
condition prevents its normal operation
BAND OUT Out-of-band input signal frequency: lights when the output filter of the 500W amplifier (used to
reduce harmonics radiated by the radio set), cannot be tuned to the input signal frequency. In
this case, the highest filter band is selected to attempt continued operation
FAIL UREVOLT
TEMP
VSWR
OVER DR
TX
BYPASS
BAND
OUT
MICOM-3
1
?
@
/
P
R
S
7
*
Q
J
M
KN
LO
56
T
U
V
89
A
D
BE
CF
23
0
#
Y
W
Z
X
MEN U
Esc
P
GPS
ALARM
F1
F2
F4
F3
G
H
I
4
MICOM-RM500
USB
Headphone
Jack
Telegraphy Key
Jack
Internal Speaker IndicatorsStandard MICOM-3
PanelControl
Main ON/OFF
Switch and
Circuit Breaker
Figure 2. RM500 Front Panel
8 6888882V03