Service manual

PROGRAMMING
4-2
April 2001
Part No. 001-9800-203
4.1.3 RPI CABLES
The cables from the RPI to the computer and
transceiver are not included with the RPI. The RPI has
a female DB9 connector, and most computer serial
ports have a male DB9 or male DB25 serial connector.
Therefore, a male DB9 to female DB9 or female DB25
cable is usually required. This is a standard cable
available at most electronic and computer supply
stores. Suitable cables are also available from the
EFJohnson Company (see Table 1-3).
The cable from the RPI to the transceiver has
modular telephone-style connectors on each end. It
plugs into the microphone jack on the front panel of
the transceiver or remote control unit. The cable for
this application is also listed in Table 1-3.
4.1.4 REMOTE PROGRAMMING INTERFACE
(RPI)
The RPI provides the required interface between
the computer and transceiver. It converts the RS-232
logic levels from the computer to the TTL logic levels
required by the transceiver microprocessor and vice
versa.
A new RPI (Part No. 023-9800-000) has been
designed for this transceiver. This RPI is backward
compatible, so it can also be used to program other
EFJohnson transceivers which require an RPI (see
next paragraph for more information). This new RPI is
required for Flash programming described in Section
4.8. It also has a phone jack that is required for
injecting the transmit audio signal during alignment
(see Section 7). To perform the standard personality
programming described in most of this section, earlier
RPI’s such as Part No. 023-5810-000 or 023-9750-000
can be used.
When programming both front and remote
models of this transceiver, the switch on the front
panel of the RPI selects either the standard or Flash
programming mode. The standard mode is selected
when it is away from the LED and the indicator is
green, and the Flash mode is selected when it is
toward the LED and the indicator is amber. The stan-
dard mode should be selected for all but Flash
programming.
With some remote mount transceivers (not 9800
series), this switch is used to turn transceiver power on
and off. A separate 9-16 VDC, 200 mA power supply
(such as P.N. 563-0001-005) must then be plugged into
the RPI power jack to provide power to the RPI.
4.1.5 EEPROM DATA STORAGE
Most personality information programmed in the
following sections is stored in the Flash memory
device (U108). An EEPROM that is part of the micro-
computer chip is used to store such things as align-
ment parameters and current switch settings. Both
Flash and EEPROM devices store data indefinitely
without the need for a constant power supply. The
transceiver can be removed from the vehicle or even
stored on a shelf indefinitely without affecting
programming. They are also reprogrammable which
eliminates the need for a new device if personality
information or the operating program is changed.
If the operating program needs to be updated,
reprogramming is performed using the same setup and
special Flash programming software. The procedure
for reprogramming the Flash memory is described in
Section 4.8.
4.1.6 HARDWARE HOOKUP
The programming setup is shown in Figure 4-1.
The cable from the RPI to the transceiver is connected
from the modular jack of the RPI to the microphone
jack on the front panel of the transceiver or remote
control unit. Data transceivers are also programmed
using the jack on the front panel.
The RPI has a switch which selects standard or
Flash modes with 9800-series models. Make sure that
the standard mode (position away from the LED) is
selected. This mode is indicated by a green LED when
power is applied.
4.1.7 POWERING UP A DATA TRANSCEIVER
Data transceivers do not have any front panel
controls as shown in Figure 1-1. Therefore, there is no
power switch to turn power on and off for program-
ming. One method that can be used to turn power on is
to jumper two pins of the 10-pin connector on the RPI.
Connect a jumper from Pin 1 to Pin 2 as shown in the