TONO THETA 5000E Sender-Decoder

With the most up-to-date computer technology, just a Terminal and a Keyboard allow complete automatic send/receive of Morse Code (CW), Baudot Code (RTTY), ASCII Code (RTTY) and New ARQ/FEC (AMTOR).

When they wrote this t was a long time back, well Nowadays it is not ‘New Technology’, but at least it made me chuckle.

Built-in Monitor

5-inch High-Resolution Green Monitor is Built -in, the unit even has the provision for a Composite Video Signal output.

ARQ/FEC Feature

AMTOR A, B and L communication is Possible.

Time Clock Built-in

Display Month, Date, Hour and Minute on the Display Screen.

Timer Transmission / Receiving Feature.

The Inner Timer enables complete automatic TX/RX.

Selcal (Selective Calling) System.

With the feature the unit only receives messages following the Preset Code.

Built-in Demodulator for High Performance.

Newly designed high speed RTTY demodulator has receiving capability of as fast as 300 bauds. Three-step shifts selects either 170Hz, 425Hz or 850Hz shift with manual fine tune control of space channel for odd shifts. HIGH (Mark Frequency 2125Hz / LOW (Mark Frequency 1275Hz) tone pair select. Mark only or Space only copy capability for selective fading. ARQ/FEC feature newly incorporated.

Crystal Controlled AFSK Modulator

A transceiver without FSK function can transmit RTTY mode by utilizing the high stability crystal-controlled modulator controlled by the computer.

Optoisolator CW, FSK Keyer built-in

Very High-Voltage, High-Current optoisolator keyer is provisioned for CW, FSK keying.

Automatic Transmit / Receive Switch

The Transmit / Receive switch is controlled by the microprocessor. Built-in remote control key function automatically controls the Transmit / Receive circuitry of the transceiver. Manual operation is also available.

Battery Backup Memory

Data in the Battery Backup Memory, covering 72 characters x 7 Channels and 24 characters x 8 Channels, is retained even when the external power source is removed. Messages can be recalled from a keyboard instruction and some channels can be read out continuously. You can write messages  into any channel while receiving.

Large Capacity Display Memory

Covers up to 1,280 characters. Screen format contains 40 characters x 16 lines x 2 pages.

Screen Display Type-Ahead Buffer Memory

A 160 character buffer memory is displayed on the lower part on the screen. The characters move to the left, erasing one by one as soon as they are transmitted. Messages can be written during the receiving state or the performance with battery back-up memory or SEND function.

Pre-loud Function

The buffer memory can store the messages written from the keyboard instead of sending them immediately. The stored messages can be sent with a keyboard command.

‘RUB-OUT’ function

You can correct mistakes while writing messages in the buffer memory. Misspellings can be erased while the information is still in the buffer memory.

‘SEND’ function

Sends the transmit text displayed on the screen, including the data stored in every channel of the battery back-up memory, with a command from the keyboard. The messages can be stopped and easily restarted.

Function Display Screen

Each function (mode, channel, number, speed, etc.) is displayed on the screen.

Wide Range of Transmitting and Receiving

Morse Code transmitting speed can be set from the keyboard at any rate between 5 100 WPM (every word per minute). AUTOTRACK on receive. For communication in BAUDOT and ASCII Codes, rate is variable by a keyboard instruction between 12 300 bauds when using RTTY Modem and between 12 600 bauds when using TTL level.

The variable speed feature makes the unit ideal for amateur, business and commercial use.

Automatic CR/LF

While transmitting, CR/LF is automatically sent every 64, 72 or 80 characters, as selected.

Cursor Control Function

Full cursor control (up/down, left/right) on the transmitting screen is available from the keyboard.

WORD MODE Operation

Characters can be transmitted by word groupings, not by every character, from the buffer memory with the keyboard instruction.

LINE MODE Operation

Characters can be transmitted by line groupings from the buffer memory.

WORD-WRAP-AROUND Operation

In receive mode, WORD-WRAP-AROUND prevents the last word of the line from splitting in two and makes the screen to be easily read.

Automatic Idle Signal Insertion

Idle signal (letters code) can be automatically inserted in a pause of transmission in BAUDOT-RTTY mode.

“ECHO” Function

With a keyboard instruction, received data can be read and sent out at the same time. This function enables a cassette tape recorder to be used as the back-up memory, for operation just like telex (which uses paper tape).

Test Message Function

“RY” and “OBF” test messages can be repeated with this function.

CW Identification Function

In RTTY mode, keyboard-controlled CW identification is available if required.

MARK-AND-BREAK(SPACE-AND-BREAK) System

Either mark or space tone can be used to copy RTTY.

Variable CW Weights

For CW transmission, weights (ratio of dot to dash) can be changed within the limits of 1: 3 1:7.

CW Practice Function

The unit reads data from the hand key and displays the characters of the screen. CW keying output circuit works according to the key operation.

CW Random Generator

Output of CW random signal can be used as CW reading practice.

Audio Monitor Circuit

A built-in audio monitor circuit with an automatic transmit / receive switch enables checking of the transmitting and receiving state. In receive mode, it is possible to check the output of the mark. filter, the space filter and AGC amplifier prior to the filters.

Printer Interface

Centronics Parallel Comatible interface enables easy connection of a low-cost dot printer for hard copies.

Convenient ASCII Key Arrangement

The keyboard layout is ASCII arrangement. Automatic insertion of LTR/FIG code simplifies operation.

Bargraph LED Meter for Tuning

Tuning of CW and RTTY is very easy with the bargraph LED meter for tuning.

Provision has been made for attachment of an oscilloscope to aid tuning. This supplements the tuning bargraph LED and audio monitor provided in the system.

Both AC/DC Usable

Power Supply is switchable as required; 100-120V AC / 220-240V AC / +13.8V DC .