Option 91: 1-Microsecond Accuracy, Raim - Obsolete; Option 92: Irig-B Modulated Output; Option 93: Out-Of-Lock Relay; Option 94: Rs-422/485 Driver - Arbiter Systems 1092A Operation Manual

C.17 Option 91: 1-Microsecond Accuracy, RAIM - Obsolete
C.17

Option 91: 1-Microsecond Accuracy, RAIM - Obsolete

Please Note: This option is obsolete.
Provides for accuracy of 1-µs peak and Receiver Autonomous Integrity Monitoring (RAIM)
system, which monitors received satellite signals and ignores satellites with large timing errors.
Units with Option 91 are specifically tested by Arbiter to assure that clock accuracy is within one
microsecond. Option 91 is not field installable.
Option 91 is no longer available or necessary as all models described in this manual automatically
provide better than 1-microsecond accuracy.
C.18

Option 92: IRIG-B Modulated Output

Model 1092A/B/C and 1093A/B/C
Option 92 adds a modulated IRIG-B distribution bus, which provides a low-impedance, fault-
protection output (4 Vpp, 20-Ohm source impedance). A second EPROM adds IRIG-B modulation
and is mounted on the main board. Option 92 is field installable.
C.19

Option 93: Out-of-Lock Relay

Model 1092A/B/C and Model 1093A/B/C
Option 93 adds a single form-C single-pole, double-throw (SPDT) relay, activated by the out-
of-lock signal. This is a fail-safe relay, which is in the faulted condition with power off. The
rear-panel terminal strip provides external connection. For details on relay operation and setup,
see Section 2.3.5 and 9.1. Option 93 is not field installable.
C.20

Option 94: RS-422/485 Driver

Model 1092A/B/C and Model 1093A/B/C
Provides RS-422/485 line driver output at the standard serial port with the standard RS-232
output. See serial-port technical information in Section 10.3 for pin locations. Option 94 is not
field installable.
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