1.3.1 TS-201 DTMF Test Set

The TS-201 analyzes the DTMF output of a cue demodulator or a videotape with pre-recorded DTMF tones and displays both the tone sequence (up to eight digits) and an average of the audio levels received.  The display latches until reset by the receipt of a new tone sequence.

This test set stores the following characteristics for up to 100 events.  An event is defined as a received DTMF tone sequence.

- The DTMF tones received (to a maximum of eight tones).
- An average of the audio levels received.
- The date and time the tones were received.

This information can be retrieved in two ways.

- The data can be output to a printer with a serial interface.
- The data can be accessed with a computer and modems with the software provided with the TS-201.

The cue tone source can be terminated into the TS-201 or the test set can be installed in the audio circuit between the cue source and the commercial inserter.

An earphone jack is provided to allow the operator to monitor the incoming tones.

The TS-201 will receive up to eight DTMF tones within a two second period and display both the sequence received and the tone level.  As the tones are received, the peak voltage of each is read by the TS-201 and the levels of the entire tone sequence are averaged.  Two seconds after the last tone has been received, the display will show the tones and the average input level.

Both the tone sequence and the average level are stored automatically in a log in memory along with a time and date stamp.  This log can be output to a printer with a serial interface or downloaded to a computer containing terminal emulation software.  A disk with this software for the DOS environment is included with the TS-201.

The TS-201 mode is selected from the keypad.  The ALT (alternate) key lets you use the upper functions labeled on the keypad.  The ALT key automatically resets when another key is pressed.

3.3.1.1 Viewing and Setting the Time and Date

To View the Time and Date:
1.  Press the ALT key.
2.  Select TIME or DATE.  The current date will be displayed.

To Set the Time and Date:
1.  Press the ALT key.
2.  Press the SET key to enter the change mode.
3.  Press the TIME or DATE key to select the desired function.
4.  Press the numbers on the keypad for the correct time or date.

3.3.1.2 How to Print the Log

1.  Press the ALT key.
2.  Press the PRINT key.
3.  Press 1 to begin printing.

3.3.1.3 How to Review the Log

1.  Use the up and down arrow keys to scroll through the log.
2.  To see the time and date at which a log event occured, press ALT.
3.  Press TIME or DATE.

3.3.1.4 How to Send the Log to a Computer

A 3.5 inch diskette is included with the TS-201 and contains a Terminal program to retrieve logs with a personal computer.  Terminal software is also a standard feature of Windows.

3.3.1.4.1 How to Print the Log

1.  Install the disk and select the A prompt under DOS on your computer.
2.  Connect a data cable between the TS-201 and the computer .
3.  Decide which com port (1 or 2) you will use on your computer.
4.  Type LOGCOM1  for com port 1 or LOGCOM2 for com port 2 and press enter.
5.  Press escape.
6.  Type CAP and press enter.  The log will be displayed.
7.  Select 201-PRINT and press enter.  The log will output to the TS-201 data port.

3.3.1.4.2 How to Name the Log

1. After printing the log, press escape and type CAP.
2. Type the desired file name and press enter.

3.3.1.4.3 How to Quit the Program

1.  Press escape.
2.  Type Q and press enter.

3.3.1.4.4 How to View a Sample Log

From the A prompt, type FOX201.LOG and press enter.

3.3.1.5 How to Select Volt or dB Level Readings

1.  Press the ALT key.
2.  Press the MENU key.
3.  Select VOLTS or DB.

3.3.1.6 MENU Option

The MENU option of the TS-201 is:

LOG ERASE - erases the log.

TIME - Sets the time in the internal clock.
DATE - Set the date in the internal clock.
ARROW KEYS - Used to scroll up or down in the menu.
LOG - Selects the internal record of tone sequences, levels, and the date and time received.
ENTER - Used to enter information such as time and date.
MENU - Used to access the menu of test set functions.
ALT - Used to select upper case keyboard commands (TIME, DATE, LOG, MENU, SET, and PRINT).
SET - Selects the mode when setting the TIME and DATE.
PRINT - Sends the internal log to a printer.

   
Figure 3-2
TS-201 Connector Layout

EAR  - Earphone connector.
AUDIO - Audio input terminal.  Pins 1 and 2 are the audio input connections.  Pin G is ground.
POWER - AC adaptor input jack.  Use only the AC adaptor supplied with the test set.
ON/OFF - Power switch.
RS-232 SERIAL - Printer output terminal.

Figure 3-3

Serial Interface Cable

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