Section 3. Operation
3-8
parameter is not saved in the Model 15P's nonvolatile memory and will revert to disabled
should the power be disconnected. With Continuous Transmit enabled, a single pager number
and message may be entered as usual, followed by PAGE. The encoder will transmit the page,
pause one second, and then repeat this cycle until the CLEAR key is pressed. The Continuous
Transmit mode is in effect only until the CLEAR key is pressed, i.e., it must be reset just
before each continuous transmit page.
NOTE
The Continuous Transmit mode may not work with PG-50 format display pagers.
OPTIONAL SERIAL PORT
Power-Up Test
The Model 15P encoder has no dip switches in order to configure it. Instead, the encoder’s
configuration options are selected in Programming mode (see “Programming System
Parameters” in Section 5). This means that nothing has to be set before applying power.
To test the CRT installation, connect the serial ports of the two units and then apply power
first to the CRT and then to the encoder. When the encoder powers up, it prints the following
message on the CRT screen:
Model 15P Field Programmable, Ver: 2.1
Copyright, 1984-1996, ZETRON INC.
If this message is not received, check to see that the serial cable is wired correctly (TX and
RX may be reversed). If garbled characters are received, the CRT and encoder baud rates are
different or the communication parameters (8 data bits, 1 stop bit and no parity) are not set
correctly on the CRT. Check jumper JP-14 on the PCB for the baud rate setting. This jumper
can be checked by turning the encoder upside-down and looking through the small, square
hole midway up the left side. The default position is 9600 baud. It will be necessary to
remove the bottom cover in order to set P-14 to the lowest baud rate settings.
