Description And Specifications; General Description; General 803 Features - RTS 803 User Instructions

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Description and Specifications

1.1

General Description

The RTS Model 803 Master Intercom Station is an up-
dated replacement to the popular Model 802. By employ-
ing many of the technological breakthroughs that have
occurred since the design of the 802, RTS has been able
to integrate into the 803 the complete circuitry for all 802
base features and options except squawk. For example,
call signaling is now standard on all twelve intercom chan-
nels. For applications requiring 4-wire operation, IFB
panel emulation or ISO panel emulation the circuitry is al-
ready there; you simply install an option cable to the back
panel, set one or two internal DIP switches (IFB and ISO
emulate only) and you're ready to go. For all other applica-
tions, everything you need is "in the box".
In terms of form, fit and function the 803 can directly re-
place the 802 with the following exceptions: 1) squawk is
not supported on the 803; 2) many users do not require a
front panel gooseneck microphone, so that is now sup-
plied as a separate plug-in style microphone (unlike the
802 microphone which was permanently mounted); 3) the
803 includes built-in DC blocking for the intercom chan-
nels, so when connecting to powered intercom channels
that were previously connected to an 802, the external iso-
lation capacitors are no longer required and may have to
be removed for best audio performance; 4) although sel-
dom done in practice, the 802 could be DC powered; the
803 cannot.
In addition to it's role as a product replacement for the
802, the 803 also adds several new features in response to
the increasing communication needs of a variety of users.
Following is a general description of 803 features. Ex-
panded descriptions of these features, a detailed compari-
son and contrast with the 802, and a list of specifications
may be found on the following pages.

1.1.1 General 803 Features

Audio Inputs and Outputs: 12 intercom channels
(channels 1-12); 3 auxiliary channels (channels 13-
15); 2 program inputs; 2 headset dynamic-mic inputs
and headphone outputs; 2 headset carbon-mic inputs
and headphone outputs; 2 electret panel mic inputs; 1
built-in speaker and 1 switched speaker output; 1 un-
switched, balanced mic output (hot mic).
Control Inputs and Outputs: 6 DPDT relay outputs
and 1 external switch contact input, all assignable via
the front panel setup-mode; 12 dedicated, open-col-
lector keying outputs (one for each intercom chan-
nel); 1 RS232/RS485 port for remote control,
programming, and monitoring.
Three Operating Modes: 1) normal operation, where
front panel controls are used for intercommunications
2) setup mode, where front panel buttons access the
user-programmable setup features; 3) DTMF mode,
where the keypad is used for telephone dialing on a
selected intercom channel.
Audio Input Control: Complete control of audio mix
for all audio inputs via a combination of user con-
trols, setup trimmers and the RS232/RS485 port. All
audio inputs are assignable, via setup mode, to left
headphone, right headphone, speaker, or any combi-
nation.
Two-Wire and Four-Wire Operation: two-wire opera-
tion (with or without nulling) or four-wire operation
independently selectable for each intercom channel
via front panel setup mode; two-wire operation is
standard (balanced or unbalanced); four-wire inter-
com channel operation requires an optional 50-pin
connector); auxiliary channels 13 & 14 are four-wire
only; auxiliary channel 15 is two-wire only. All chan-
nels (intercom and auxiliary) support simultaneous
two-way communication (full duplex).
ISO Operation: Compatible with RTS VIE-306 Video
ISO System; interfaces with external RTS VCP-6 or
VCP-12 ISO Panels, or emulates these panels inter-
nally (requires one optional 50-pin connector for
VCP-6 emulation; two for VCP-12 emulation).
IFB Operation: Compatible with RTS Model 4000
IFB System; interfaces with external RTS Model
4001 or 4002 IFB panels, or emulates these panels in-
ternally (requires one optional 50-pin connector for
Model 4001 emulation; two for Model 4002 emula-
tion). Also supports "local IFB", where any channel
may be configured as a stand-alone IFB.
User-Programmable Setup Features: A variety of pro-
grammable features allow the user to customize, sim-
plify, and "automate" communication tasks. (Features
list includes original 802 features plus new features.)
Control Signals: Call send and receive (compatible
with TW intercom system), with 3 chime tones (or no
chime) selectable for call send; talk-off send (compat-
ible with RTS TW intercom system); global reset
send (compatible with RTS VIE-306 Video ISO Sys-
tem); DTMF send (for touch-tone dialing).
Note: control signals are applicable to the 12 intercom
channels only, and not to the 3 auxiliary channels.
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