RHOTHETA User Manual RT-800
Page 32 of 192
Thus, one of them is always active and the other one can be set to “active” at one
button press, whereby the previously active frequency becomes the “standby”
frequency instead.
Fig. 8 Input of a new frequency
The currently selected digit is indicated by a green-colored frame.
The input of digits can be done with the numerical buttons on the front of the device (s. Fig. 8,
field 8).
The arrow buttons “up” and “down” (s. Fig. 8, field 6) allow the input of the frequency/channel,
using a sophisticated input scheme. Depending on the other digit values, that are already set,
the system allows the selection of only correct numbers for the current digit.
Note
If the system does not allow entering the desired number for a current digit, control other
digits in the input field and correct them if necessary. The system shows you, which digit is
wrong by flashing the cursor-frame in red.
Note
Frequency step width depends on the selected frequency band (s. 9.1):
UHF / VHF Air Band
:
25 kHz / 8.33 kHz (s. Appendix, 13.7)
Marine Band:
5 kHz
COSPAS-SARSAT:
8.33 kHz
UHF FM Band:
5 kHz
Note
The input of invalid or not licensed frequency values will not be accepted.