General Dynamics C4 Systems URC-200 (V2)
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4.4.7.4 Release from Remote Control
Pressing the [MODE] key and then the [R/T] key returns the transceiver
to local control from remote control. This sequence is called Release
Remote Key Sequence (RRKS). This key sequence has no effect if the
transceiver is not in the remote control mode. There is no on-screen
indication that the transceiver is back in local mode.
4.4.8 Voice (PT) Operation
The following procedure enables voice operation.
1. Attach the VHF/UHF antenna and H-189/GR handset to the transceiver.
2. Turn the transceiver on by rotating the VOL control clockwise.
3. Set the transceiver to PT (plain text mode).
4. Set the SQ control to OFF and set the VOL control until noise is heard from the handset
or the loudspeaker.
5. Select operating modes and frequencies.
6. To transmit, hold the Push-To-Talk (PTT) switch down while talking into the
mouthpiece.
7. To receive, release the PTT switch and listen to the handset earpiece or to the
loudspeaker.
8. To eliminate the background noise when no receive signal is present, turn the SQ
control clockwise just until the noise turns off. Adjusting the control further clockwise
reduces the sensitivity of the squelch-break.
4.5 URC-200 (V2) EEPROM Limitations
The URC-200 (V2) transceivers use the Freescale MC9S08DN60AMLH microprocessor for
control and interface operations of the transceiver. The processor has 2048 bytes of internal
EEPROM that is capable of storing data after the power has been turned off. The EEPROM's write
cycle (an erase followed by a write) is only guaranteed for 100,000 operations. However, typical
operational life at ambient temperatures (approximately +25°C) is much greater.
Excessive use of the following commands results in a reduction in the EEPROM's write cycle life.
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