Operator`s manual

Model VR240 Audio Logging Recorder
January 2000
F-1
APPENDIX F
THE STATUS PRINTER
The VR240 has a provision for creating a printed record of channel activity. In order to take
advantage of this, you must provide a “line printer” and an appropriate cable. Because of the
vast selection of printers on the market, Eventide does not provide either the printer or cable.
F-1. PRINTER REQUIREMENTS.
The requirements for the printer are quite modest:
Its RS-232 interface must be capable of operation at 9600 baud, no parity, 8-bit data
word, 2 stops-bits.
It must be capable of XON/XOFF data flow control and not REQUIRE a “hardware
handshake.”
It should print at least 80 columns on fan-folded paper and have tractor feed capability.
A wide carriage printer with 132-column capacity is preferable since 80 characters may
be insufficient for some lines if you use long channel descriptors.
You have the choice of printing as little as one channel activity summary every 24 hours
to as much as a summary every five minutes, along with a notation each time a channel
is activated. Unless you plan on doing the latter, an inexpensive, light-duty printer
should be satisfactory, as the output is unlikely to exceed a few pages per day.
We specifically recommend that you not use a laser or other type of page printer, as it
may require many hours to fill a page, and you won’t be able to see the information until
it is printed. Also, once information is sent to the printer, it is deleted from the VR240
memory, and if the printer suffers a power glitch, the information may be lost.
The VR240 provides no hardware handshake signals. If your printer requires handshake inputs
to operate, connect them directly to one of the printer’s handshake outputs. One of the two
cables shown below will probably work, assuming your printer has a 25-pin connector and is
either a “DCE” or “DTE”. Refer to your printer manual to determine which is appropriate, or
how to wire a different connector.
VR240 (PORT A on rear panel) PRINTER (DCE)
Pin 2 >----------------------------> Pin 2 (Serial data to printer)
Pin 7 <----------------------------< Pin 3 (Serial data received from printer)
Pin 3 ------------------------------- Pins 1, 7 (Ground)
----< Pin 8
|
----> Pins 4, 20