Comtech EF Data SMS-758 - Manual (Page 10)

Table of Contents SMS-758 Modem Protection Switch
vi MN/SMS758 Rev. 3
CHAPTER 3. OPERATION ........................................................................................ 3–1
3.1 Front Panel Description .............................................................................................................................. 3–1
3.1.1 LED Indicators ....................................................................................................................................... 3–2
3.1.2 Keypad and LCD Display....................................................................................................................... 3–2
3.2 Switch Setup................................................................................................................................................. 3–6
3.2.1 System Setup .......................................................................................................................................... 3–6
3.2.1.1 Time and Date Menu....................................................................................................................... 3–6
3.2.1.2 Downlink Option............................................................................................................................. 3–7
3.2.1.3 Active Prime Modulators Menu...................................................................................................... 3–7
3.2.1.4 Active Prime Demodulators Menu.................................................................................................. 3–7
3.2.1.5 Active Backup Modulators Menu ................................................................................................... 3–7
3.2.1.6 Active Backup Demodulators Menu ............................................................................................... 3–7
3.2.1.7 Modem Addresses Menu................................................................................................................. 3–8
3.2.2 Modem Setup ......................................................................................................................................... 3–8
3.2.2.1 Interface Type Menu....................................................................................................................... 3–9
3.2.2.2 Downlink Selection Menu............................................................................................................. 3–10
3.2.2.3 Modulator Priority Menu .............................................................................................................. 3–10
3.2.2.4 Demodulator Priority Menu .......................................................................................................... 3–10
3.2.2.5 Demodulator Delay ....................................................................................................................... 3–11
3.2.2.6 Modulator Delay ........................................................................................................................... 3–11
3.2.3 Modem Configuration .......................................................................................................................... 3–12
3.2.3.1 Prime and Backup Modem Configuration..................................................................................... 3–12
3.2.3.2 Modem Configuration Menu......................................................................................................... 3–12
3.2.3.3 Modem Verification...................................................................................................................... 3–13
3.2.4 Faults .................................................................................................................................................... 3–13
3.2.4.1 Modulator Operation Fault............................................................................................................ 3–13
3.2.4.2 Demodulator Operation Fault ....................................................................................................... 3–14
3.2.4.3 M:N Faults .................................................................................................................................... 3–14
3.2.4.4 Battery Faults ................................................................................................................................ 3–14
3.2.5 Operational Modes ............................................................................................................................... 3–15
3.2.5.1 Bypass Mode................................................................................................................................. 3–15
3.2.5.2 Auto Mode .................................................................................................................................... 3–15
3.2.5.3 Local Mode ................................................................................................................................... 3–20
3.2.5.4 Remote Mode................................................................................................................................ 3–20
3.2.6 Status Menu.......................................................................................................................................... 3–21
CHAPTER 4. THEORY OF OPERATION .................................................................. 4–1
4.1 Monitor and Control ................................................................................................................................... 4–1
4.1.1 Theory of Operation ............................................................................................................................... 4–2
4.1.2 M&C Serial Interface ............................................................................................................................. 4–2
4.1.3 Remote Baud Rate.................................................................................................................................. 4–3
4.1.4 Remote Address ..................................................................................................................................... 4–3
4.1.5 External Remote Serial Interface Selection ............................................................................................ 4–4
4.1.6 Battery .................................................................................................................................................... 4–4
4.1.7 Error Response Function ........................................................................................................................ 4–4
4.1.8 External I/O Interrupt Arbitration........................................................................................................... 4–5