Section 4–6
TW7000 SERIES HF TRANSCEIVER section 4
7000RF
An FSK modem for the 7000-series radios that allows communication with the RT7201F external FSK remote control
head. It permits control of the radio remotely from the RT7201F Control Console over an audio 2-wire pair (with the
radio being the “master”). Used when long-range remote control is required. This option is standard in the “7000RF”
models of the transceiver, which permits “remote-only” operation, but is optional in other TW7000 models, which are
used if both remote and local control of the transceiver is desired. No HF Data communications are possible through the
TW7201F control head.
7000RI
A DHSL high-speed modem for the 7000-series radios that allows communication with the TW7201I external DHSL
remote control head. When installed, it permits reliable “real-time” remote control up to 2 km. This option is standard in
the TW7000RI models of the transceiver, which permits “remote-only” operation, but is optional in other TW7000
models, which are used if both remote and local control of the transceiver is desired. HF Data communications are
possible through the TW7201I control head.
7000RS
The 7000-series radios have two external COM ports, both of which are configured for RS232 operation. The 7000RS
option allows configuring the COM1 port for RS422/423/485 interface standards depending on the user requirements for
external control of the radio by a computer.
TW7000AIRSELCALL
This option permits the TW7000 radio to operate with a SELCAL encoder. It adds a secondary control line to the radio
and allows the use of the ICAO-mandated Ground-to-air SELCAL 4-tone system. Once the calling sequence is sent, the
radio returns to normal SSB mode.
7000VEM
This option is now included standard in all 7000-series radios. A DSP based audio processing module for the 7000-series
radios that improves the quality of the received audio signals. It allows the operator to select one of two available signal
enhancement modes, either adaptive peaking or spectral subtraction, designed to remove less coherent forms of noise
and/or subtract extraneous signals from the received audio to improve the overall signal-to-noise ratio.
7000WB1
A 7000-series option that adds a second IF filter specially designed for the passage of data. This is a wide-band, 300 –
3300 Hz filter with tailored group delay characteristics (meets the requirements of STANAG 4285). The filter is
selectable from the front panel of the radio (data mode). This option should be ordered if the radio is being used in a data
system with a MIL-STD-188-110B data modem.
TW7000 Remote Control Units
All functions of the TW7000 can be controlled remotely, either via an external computer or from one of three Datron
Remote Control Units listed here. Full-function remote control options available for the TW7000 include an
extended control unit (TW7201E) for short distance (up to 50 feet) operation, and remote control units (TW7201I or
TW7201F) for longer range using either an integrated DHSL high-speed modem (2 km range) or an integrated FSK
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