Table of Contents
Advertisement
Operating Characteristics
GEK-36150
the valid data is written; otherwise, the first character of valid data would be lost. The "till" character is not
recorded. The "beginning" of data includes any time when 16 milliseconds have elapsed since data was received.
If it is anticipated that a tape being made will be used to make a second tape in another TCA (at 120 cps), a "till"
character should be written at the beginning of data. If a third tape is made from the second tape, two (2) fill
characters should be written on the first tape.
For example, Tape 1 is written from the keyboard at 30 cps (or less) with two (2)
11
fill
11
characters.
Tape 1 is used to write Tape 2 (in another TCA) at 120 cps. Since one (1) "till" character is lost, Tape 2 has
one (1)
11
fill
11
character.
Tape 2 is used to write Tape 3 (in another TCA) at 120 cps. The "till" character is lost and Tape 3 has no
"till" character.
If Tape 3 was used to make a fourth tape, the first character of data would be lost.
From the preceding example, you can conclude that the anticipated number of times the data is rewritten in the
manner described will dictate the number of "till" characters that should be written on the first tape.
ON LINE INTER-BLOCK GAP (A2 MODEL ONLY)
A received "Recorder On" Code (OC2) will initiate an inter- block gap. The transmitting Printer must provide a
minimum time delay of 300 milliseconds after the transmission of the DC2 code so that data is not sent while the
receiving TCA is generating an inter-block gap. Insert the flll characters after the DC2. For an approximate 300
millisecond delay, use nine (9) "till" characters at 30 cps, five (5) at 15 cps, and three
(3)
at 10 cps.
USING THE TermiNet 1200 PRINTER WITH THE TermiNet
CASSETIE ACCESSORY (TCA), A3 MODEL
RECORDING
Incremental Rates
Recording on tape from the keyboard is straightforward at incremental rates (10 or 30 cps), but cannot be done at
120 cps. At incremental rates, characters are recorded as keyed in. Characters which may require delays in the
Printer when read out (LF, BS, VT, FF, ESCH, ESCJ, DC3) are followed by a short space of blank tape to enable
the tape unit to stop and start when reading at non-incremental rate (120 cps). This blank tape (about ;!_character
spaces) is written in approximately .024 second. This will not result in any noticeable delay to the operator. In
addition to the blank tape generated, VT and FF must be followed by 2 fill characters.
When writing a tape at an incremental rate from an automatic data source, time must be allowed to write the
required space on tape. There is always ample time for this at 10 cps. At 30 cps, time must be provided after delay
characters.
One
fill is sufficient for all delay codes except VT and FF which must be followed by three fill
characters.
NOTE
If the Printer motor is on, the Fill Character rules for the Printer must also be
satisfied.
In addition to the delay characters listed in the above paragraph, a DC2 code must be followed by 300 msec. of
delay time or the appropriate number of Fill characters to allow for the writing of Inter-Block Gap. Recording is not
dependent on the state of the Data Set Interface leads.
6-14
Advertisement
Table of Contents
