Motorola MT 2000 User Manual page 135

CHANGE/VIEW
FIELD DEFINITIONS:
Ignore Sec/Clr Switch When Strapped
If this parameter is set to Yes and the active radio mode is strapped to Secure or Clear, the radio ignores the
setting of the Secure/Clear Switch and allows user-initiated voice transmissions based upon the mode's
strapping. In this configuration the Secure/Clear Switch has no effect. If this parameter is set to No and the active
radio mode is strapped to Secure or Clear, the radio checks the position of the Secure/Clear Switch
against the active mode's strapping. If the strapped value does not match the setting of the switch, the radio will
not transmit
The factory default is No.
XL IC Present
This field should be set to Yes if the radio is equipped with an XL chip.
Tx Clear Alert Tones
When this field is set to Enabled, an alert tone will be generated every time the user keys up the radio in the clear
mode. The factory default is Enabled.
Periodic Keyfail Alert Tone
When this field is set to Enabled, a periodic alert tone will be generated whenever the radio has lost key and one
of the following conditions are met:
1. Secure/Clear Strapping is set to Secure or
2. Secure/Clear Strapping is set to Select and the two position concentric switch is in the secure position.
Factory default is Enabled.
Non-XL Scan Unsquelch Duration
When scanning for coded transmissions, this field determines the period of time that the radio will wait for a Non-
XL (Cipher Feedback) encrypted signal to be detected following a carrier detect. When the Scan Select field in
the Personality screen is set to Non-XL, the selected value for this field is used when scanning.
The range is -60-6375 in 25 ms. increments. The factory default is 275 ms.
XL Scan Unsquelch Duration
When scanning for coded transmissions, this field determines the period of time the radio will wait for a Non-XL
(Cipher Feedback) or XL encrypted signal to be detected following a carrier detect. When the Scan Select field in
the Personality screen is set to Non-XL&XL, the selected value for this field is used when scanning.
The factory default is 875 ms. The range is -60-6375 in 25 ms. increments.
Secure Punch Thru
Use UP/DOWN arrow keys to scroll or directly enter the desired value. The RSS shall allow the user to set the
Secure Punch Thru feature to one of the following settings: Disabled, Always On, or to a Variable Volume
Position (i.e. the feature will become active when the volume knob is set to a level greater than this programmed
volume position). The valid range of the Variable Volume Position is from 1 to 254 which corresponds to the
absolute position of the radio volume knob.
Secure Punch Thru is a feature intended to reduce high volume distortion in the secure receive mode by
removing much of the distortion producing low frequency content (i.e. from amplifier clipping and speaker/housing
overload), and improve intelligibility in high background noise environments (i.e. the radio is at high volume), by
boosting the high frequency content that tends to get washed out in such conditions.
The Secure Punch Thru feature is activated when the radio is receiving in the secure mode and the volume knob
is beyond an RSS programmable position. The feature turns off the de-emphasis filter in the receive secure audio
path, leaving the audio pre-emphasized from the transmitter (i.e. the lower frequencies are reduced and the
higher frequencies are increased). The factory default is Disabled.
This feature requires the transmitting radios to use pre-emphasis, which is normally the
case. Also, the Secure Punch Thru feature activation point can be anywhere from the
volume knob's lowest position (i.e. turned on all the time when receiving secure) to its
highest position (i.e. turned off all the time when receiving secure).
6-8
Note
MTSX RSS
68P81074C50