Led Indicators; Rssi Measurement - GE MDS 4710A Technical Manual

14
If all parameters are correctly set, start radio operation by following
these steps:
1. Apply DC power to the transceiver.
2. Observe the LED status panel for the proper indications
3. If not done earlier, refine the antenna heading of the station to maxi-
mize the received signal strength (RSSI) from the master station.
Use the command from an HHT connected to the radio's
RSSI
connector. See Section 4.0, TRANSCEIVER PROGRAMMING
Page 15. This can also be done with a DC voltmeter as described in
Section 3.2, RSSI Measurement (Page

3.1 LED Indicators

Table 7 describes the function of each status LED.
Table 7. LED Status Indicators
LED Name Description
• Continuous—Power is applied to the radio, no problems detected.
PWR
• Rapid flash (five times-per-second)—Fault indication.
• Flashing once every 5 seconds—Radio is in Sleep mode.
• Flashing—Indicates the radio is receiving intermittent data frames.
DCD
• Continuous—Radio is receiving a data signal from a continuously
keyed radio.
An EIA-232 mark signal is being received at the DATA INTERFACE
TXD
connector.
An EIA-232 mark signal is being sent out from the DATA INTERFACE
RXD
connector.

3.2 RSSI Measurement

As an alternative to using an HHT, the radio's received signal strength
(RSSI) can be read with a DC voltmeter connected to Pin 21 of the
INTERFACE
connector.
received signal level and the DC voltage on Pin 21 of the
FACE
connector. (Note: Readings are not accurate for incoming signal
strengths above –50 dBm.)
MDS 4710/9710 Technical Manual
14).
PWR DCD TXD RXD
Figure 8 shows the relationship between
(Table 7).
DIAG
on
DATA
DATA INTER-
MDS 05-3305A01, Rev. E