Operation Manual

OM-E 2072-09287-00
3-60
3. Press PROG to enter the Programming screen.
RAD
ALE
LANG
VCD
PROG
4. Press VCD to enter the Vocoder menu.
5. Press the relevant key to access the Vocoder options:
• PVT
Select the key used in the private mode.
• CONF
Display information on the vocoder hardware and software.
• ERAS
Erase the stored keys.
Figure 3-8 shows the VCD programming options. The available selections are described in the
following sections.
Figure 3-8. VCD Programming Menu
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ALE
LANG
VCD
PROG
PROGPROG
PROG
PVT
CONF
ERAS
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8
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3-13.3.1 Selecting the Vocoder Mode and Keys
Vocoder offers two protection modes: privacy and public key encryption. The keys to be used must be
loaded into the vocoder, before starting operations.
3-13.3.1.1 Selecting the Vocoder Private Key
Private reception and transmission are possible only when a valid key is selected. If the selected key is
not valid or is not stored in the vocoder, a tone will be heard and the selection is rejected.
To select the vocoder private key to be used in this mode:
1. Access the Vocoder Programming menu: MENU > MORE > PROG > VCD (F4).
2. Press PVT to enter the privacy key selection mode.
3. Use the UP/DOWN keys to scroll through PVT1 to PVT8.
NOTE
The displayed key number flashes until its selection is confirmed.
4. Press ENTER to confirm the selection of the key displayed on the screen.
Press ESC to revert to the previous setting.
3-13.3.1.2 Display of Vocoder Information
1. Access the Vocoder Programming menu: MENU > MORE > PROG > VCD (F4).
2. Press CONF (F2).
3. The screen changes to display the vocoder host version, and the function of key F1 changes: it
now enables you to scroll cyclically through the information items displayed on the screen.