Users Manual

MDS 05-6399A01, Rev. G MDS™ Master Station 117
Table 6-21. 6847 Alarm Module RF Performance
Frequency Band
100-1000MHz
Power Handling
+42dBm, Maximum
Insertion Loss
Frequency (MHz) Loss (dB)
100 0.2
200 0.4
300 0.5
400 0.5
500 0.6
600 0.7
700 0.8
800 0.8
900 0.8
1000 0.8
RF Connector
Type
Dual FAKRA-SMB
The Alarm or Alarm/Relay module does not support hot swappable field
replacement; power must be removed from the system before removal or
installation of this device. Refer to Section 8.4 Replacing Modules for information on re-
moval and installation.
Alarm Module LEDs
The Alarm Module includes LEDs to indicate the active Radio Module (A or B) as well as the
presence of a Major or Minor Alarm.
Table
6
-
22
. Alarm Module LEDs
LED Name
Behavior
Meaning
ALARM MAJ. RED On—Major Alarm (Master Station)
ALARM MIN. RED
On—Minor Alarm (Master Station)
ACT A BLUE
On—Radio A Active
Off—Radio A Standby
ACT B BLUE
On—Radio B Active
Off—Radio B Standby
Alarm/Audio Interface
The ALARM/AUDIO Interface on the Alarm/Relay module provides audio signaling and alarm
outputs as shown below.
AUDIO (MPRS Only):
- 4-wire audio circuits are connected to pins 1 through 4 as shown in Figure 6-10.
- Terminals 1 and 2 are for transmit audio input with a nominal 600 : impedance.
- Terminals 3 and 4 provide receive audio output with a nominal 600 : impedance.