User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
PAGE 2-20 SECTION 2: PRODUCT DESCRIPTION
2.4.4 Switches
There are two sets of 8-segment DIP switches (SW1 & SW3) and two rotary switches (Address
TENS and ONES), as shown in Figures 2-4 through 2-6 on the rear panel of the LYNX.sc radio.
These switches provide user configuration of several radio parameters. A brief explanation for
each function follows.
Refer to the switch setting detail in Appendix B for your
particular model.
SW1
Input
Alarm
Disable
These switch segments allow the user to “turn off” the DATA LOSS alarm for any
input channel. This can be helpful if the data channel is not in use or while
performing maintenance to temporarily turn off the alarm indication. Even when this
alarm is disabled, the LYNX.sc radio will inject AIS into the transmitted data stream
when there is a data loss condition. (see Section 3.12.4)
Loopback
Mode
This switch segment allows the user to select either the internal or an external test
signal while in loopback mode. (see Section 3.12.2)
Error
Unlatch
This switch segment selects an optional mode for the ERROR LED to flash for each
error occurrence (instead of latching on). This can be useful for short duration
loopback testing when the operator is located at the terminal site and watching for
errors. (see Section 3.13.3)
AIS
Disable
This switch segment allows the user to select whether or not an AIS signal will be
automatically injected into the received E1 data stream at BER ≥ 1 x 10
-3
. This can
be useful for measuring threshold or when a E1 channel is not in use. The AIS will
be injected into the received E1 data stream if the radio loses sync (RX SYNC alarm
active), even if the AIS disable function has been selected. (see Section 3.12.5)
Diag-
nostic
Protocol
This switch segment is default set to Telemetry Bit Oriented Serial (TBOS) mode on
the diagnostics port. This is a non-proprietary network management protocol which
is common to some radio networks. The other selection is for factory use only. (see
Section 3.14.3)
Enable
Aux
Data
This switch segment allows the AUX DATA port to be optionally used as a clear
service channel for RS-232 or RS-444 (≤ 9600 baud) user data. The radio normally
“bridges” the AUX DATA port to the DIAGNOSTICS PORT for TBOS radio network
management. (see Section 3.14.4)