
OPERATION CHANGES
2
March 2000
Part No. 001-7600-002
SECTION 3 OPERATION CHANGES
Updated Operating Software
General
Beginning later in 1999, transceivers began ship-
ping with a new version of operating software. Trans-
ceivers with this new operating software can be identi-
fied as follows:
• The revision letter in the identification number is
“C” or later (see Section 1.5 of the service manual).
• The operating software is Rev 2.0 or higher. This
number can be determined using the programming
software by selecting Program > Information as
described in Section 4.4.4 of the service manual.
Programming software Revision 2.1 or later is
required to program transceivers with this new
operating software. See “Programming Changes” on
the next page for more information.
New Features
New features provided by this updated operating
software are as follows:
• Additional banks can be programmed (see “Bank
Select” which follows).
• Microphone hanger off-hook detection can be
disabled (see “Microphone Hanger” which follows).
• Support is added for an optional scrambler. How-
ever, that particular scrambler is not available, so
references to scrambling on programming screens
can be ignored. If scrambling is desired, use the
Transcrypt SC20 scrambler instead. Contact your
E.F. Johnson sales representative for more informa-
tion on available scramblers.
• With a 2-tone decoder, the 2nd Tone Period can now
be set for 0-25.5 on the Screen > 2 Tone Code Ch
screen.
Microphone Hanger
The radio can now be programmed so that the
microphone hanger off-hook condition is not detected.
The functions which can be enabled by an off-hook
condition are then not available. They are disabling
scan, enabling the monitor mode, and selecting the
priority channel. Off-hook detection is disabled by the
Screen > Expert menu by programming the “Mic
Hanger Hook” parameter “On”.
3.2.1 Front Panel Controls
Microphone Connector - The part numbers listed in
this description are incorrect. The correct numbers are
listed in Table 1-1 on the preceding page.
3.3.7 Bank Select
In addition to two banks of up to 16 channels
each, the following bank configurations can now be
programmed:
• 2 banks of up to 16 channels each
• 4 banks of up to 8 channels each
• 2 banks, one with 20 channels and the other with 12
channels
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