MCL TN440-3, Technical Note

Page: 14 / 36

TECHNICAL NOTE – OPERATION OF MT4400 TWTA 08/10/2004
TN4400-3 MCL, INC. 14 of 36
PARAMETER DEFAULT ADJUSTMENT RANGE
COMP PROTOCOL
CSP
CSP (46A0204 & 40A1546) or
*SABUS (46A0203 & 40A1715)
COMP ADDRESS
(Hexadecimal) 01 01 through 7F (CSP)
31 through 7E (SA7670)
COMP BAUD RATE
9600 1200, 2400, 3600, 4800, 9600, 14400, 19200,
or 28800
COMP HARDWARE RS485 RS485 or RS232
*Not Available on all Models-Contact MCL for Details
4.1.4.3 Protocol & Command Set
The Protocol specifications and command sets for both CSP and SAbus are attached to this
document as appendices.
4.2 HPA Operating Modes
The following paragraphs describe the operating states of the HPA. The reported status for
these states is shown in the table below.
STATUS FROM BFC
STATE
FILAMENT
OFF
DELAY STBY
XMT
SELD
XMT
SUM
FAULT
DC power on, no operator action has
been taken.
ON OFF OFF OFF OFF OFF
DC power on, no operator action has
been taken, with a fault.
ON OFF OFF OFF OFF ON
During filament delay, without
transmit power fail recovery.
OFF ON OFF OFF OFF OFF
During filament delay, with transmit
power fail recovery.
OFF
ON
OFF
ON
OFF
OFF
During filament delay, with a fault. OFF ON OFF OFF OFF ON
Standby OFF OFF
ON
OFF OFF OFF
After filament delay, with a fault. OFF OFF OFF OFF OFF ON
Transmit OFF OFF OFF OFF ON OFF
Notes: 1. Sum Fault state disables Standby, Transmit, or Transmit Selected.
2. Alarms can occur in any of the above states.
3. Standby and Transmit are mutually exclusive.
Table 3 – Computer Control Communications Configuration
Table 4 – HPA Operating Modes