Installation manual

User & Installation manual
VHF- Communication Transceiver
Doc.-Nr:
DE-3000-800100e
KRT2 & KRT 2A
Revision 4.0
21 of 45
3.5. DUAL Watch
Because the communication transceiver KRT2 contains only one
receiver, DUAL watch is achieved by alternating between the Active and
Standby frequencies.
The DUAL button activates and deactivates the dual watch function.
Deactivation also can take place by pressing either the FREQ or
MEMORY buttons.
The frequencies to be watched should be selected prior to the DUAL
watch selection.
Scanning of frequencies is only possible when differentiating between
radio noise and radio transmissions. This can be achieved with the
squelch system set to a value of 02 or higher.
There must be radio noise suppression in order to
recognize reception. SQ must be 02 or higher.
When DUAL watch is activated, “DUAL“ is displayed on the lowest line.
The pointer next to the DUAL display indicates the frequency on which
there is reception.
The Active frequency always has priority, so the receiver remains on the
Active frequency as long as there is reception on the Active frequency.
When there is no reception on both the Active frequency and the Standby
frequency the receiver scans both frequencies 5 times per second.
When there is reception on the Standby frequency the receiver stays on
the Standby frequency, however it switches to the Active frequency every
2 seconds for 0.3 seconds. When reception is detected on the Active
frequency the receiver stays on the Active frequency.
The pointer next to the DUAL display indicates on which frequency
there is reception.
Active-frequency-reception Standby-frequency-reception