Specifications

3-4 Knobs, Buttons, and Indicators
The modes display if the option is installed. The mode buttons are dis-
abled if the Lockout or Frequency Blank functions are turned on. For
information on these functions, refer to the Alpha Menu section on
page 3-7.
Scan Group Button
A scan group is a collection of channels grouped together. When scan
groups have been identified, the SCAN GROUP buttonisusedto
select a particular scan group. For more information on scan groups,
refer to the Scanning section on page 3-18.
Scan Button
The SCAN button is pressed to begin scanning the channels in the
selected scan group. Pressing SCAN a second time terminates the
scan sequence and the TW7000 reverts to the last channel scanned.
For more information, refer to the Scanning section on page 3-18.
RX Attenuator Button
The ATT button changes the status of the input receiver attenuator
from ON (+20 dB input RX pad) to OFF,orviceversa.
Squelch Button
The SQ button changes the status of the squelch circuit from ON to
OFF,orviceversa. IntheON setting, background noise is muted.
External RF Amplifier Button
The EXT AMP button provides push-to-talk (PTT) control from
Accessory 3 of the TW7000 to an external amplifier. When set to ON
the RF power is automatically set and locked in the H (high power)
position. When set to OFF, control is restored and the TW7000 no
longer requires an external amplifier.
Tune Button
If automatic antenna tuners, like the AT/RAT100, RAT1000, and
AT7000, are attached to the transceiver, the TUNE button activates the
tune cycle.
USB PCS Same as USB mode with addition of the carrier in
transmit mode at a level of -16 dB relative to PEP
Mode Description