User's Manual

MCPS4080 System Monitoring
24 MCPS4080 Operations Manual
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2001 Spectrian Corporation. All rights reserved.
5.4.2 MCPA Module Alarms
The set points, delay, reset points, and latching conditions of all three types of
alarms are software configurable. Some Minor alarm settings can be specified by
the customer but must be agreed upon between the customer and Spectrian prior to
installation or modification. Alarm limits for Major and Critical Alarms are fixed
and can not be modified, insuring long term reliability of the MCPA module.
Type Indicator Condition Action / Response
No Alarm LED Green Normal operation None
Major LED Amber System malfunctioning but operating (degraded
performance)
System Reset after Dwell
Table 4: Module Alarm Hierarchy
Description GUI
Mnemonic
Minor
Alarm
Set Point
Major
Alarm
Set Point
Major Alarm
(Module
Shutdown)
Critical
Alarm
Dwell Time
Critical
Alarm Latch
Hysteresis
Reset Point
Main Amp
Base Temp
TMP 75°C
> 82
°
C > 90
°
C, >120
°
C, no dwell
10 min. No
70
°
C
Over/Under
Voltage
OVS/ UVS 22 to 24V 20 to 22V or
28 to 30V
<20V or >30V 5 sec No 24V or 28V
IM Degradation LOP Adjustment
limit rail
N/A N/A No N/A
Load VSWR VSR >10:1 >4:1 N/A No N/A
RF Overdrive OPR N/A >125W 2 sec Yes 150W
Fan Failure FAN Low RPM
(
≤
50%
rated)
1 Fan
Failed
2 Fans Failed None No N/A
Input Current CKT N/A >60A >60A No Delay After 3 Failures N/A
Gain Drop GAN N/A < -3 dB N/A 2 sec. No < -1 dB
Table 5: Default Alarm Descriptions and Settings
5.4.3 MCPA System Alarms
A multi-module MCPA system will have an Amplifier Management Module
(AMM) that summarizes the status of all modules and reports this information to
the base transceiver station (BTS). The format of this information is usually
customized for specific customers. Options for physical layer customization
include:
• Parallel TTL Interface – Summary bits for individual module status.
• Serial Interface (RS-232, RS-422) – Customized strings sent to BTS interface.
• Form-C Relay Contacts – Wired directly into BTS.
The customer usually specifies messaging layer customization. In addition
Spectrian does maintain an internal standard for serial messaging. System status is
generally a combination of the module status. The customer also specifies this. An
example of a system alarm hierarchy might be as noted in the table below.