14
MDS 4710B/9710B I/O Guide
MDS 05-3316A01, Rev. E
3.3 RSSI Chart
As an alternative to using an HHT, the radio’s RSSI may be read with a
DC voltmeter connected to Pin 21 of the
DATA INTERFACE
connector.
Figure 9 shows the relationship between received signal level and the
DC voltage on Pin 21 of the
DATA INTERFACE
connector. (Note: Read-
ings are not accurate for incoming signal strengths above –50 dBm.)
Invisible place holder
Figure 9. RSSI versus DC voltage (typical)
3.4 Remote RTU Reset
Using MDS InSite software (version 4.1 or later), a command can be
issued remotely to toggle Pin 15 of the
DATA INTERFACE
connector.
From InSite:
1. Select the
SYSTEM
(Network)
DIAGNOSTICS POLLING
from the main
menu.
2. Open the pull down menu
DIAGNOSTICS POLLING MODE
and select
REMOTE MAINTENANCE
.
3. Click on the particular remote radio that needs the RTU reset. The
REMOTE MAINTENANCE
screen appears.
4. Click on
RTU RESET LINE
to set pin 15 to High or Low.
2
2.5
3
3.5
4
–110
–90
–70
–50
+ DC VOLTS (PIN 21)
SIGNAL LEVEL (dBm)
4.5
5.0
