Bosch Security Systems M523 Users manual

Telex Model RKP-4 Beltpack

Owners / Users Manual

(Preliminary Information)

General Description:

The Telex model RKP-4 beltpack transceiver is a
component of the RKP-4 wireless intercom system.
The RKP-4 is intended for use as a belt worn wireless
full duplex intercom radio for use in a professional
installation such as television or cinema production.

A RKP-4B base station can be used with one RKP-4
beltpack. The RKP-4 transmits within the 614.1 to
746 MHz range (TV Channels 38-59). It receives in
the 482 to 607.9 MHz range (TV Channels 16-36).
The TR-1 transmitter operates on a single frequency
within an 18 MHz wide section of the transmit
frequency range. The receiver also operates on a
single frequency within an 18 MHz wide section of the
receiver frequency range.

Typical transmitter conducted output power is 50 mW.
The RKP-4 transmit power can be set to automatically
reduced when the unit is close-in to the base station to
aid in intermodulation reduction and unnecessary
transmit power.

Operating frequencies can be selected from pre-set
groups or the user can select special operating
frequencies within the 18 MHz wide allotments.

The Rear LCD display and buttons plus the talk
function switch, is located on the back panel.

From the rear LCD display and buttons the following
menus may be obtained:

• Group and Channel

• Transmit Frequency

• Receive Frequency

• Battery Life

• Microphone Gain

The top LCD display and associated buttons are used
to access various users on any digital matrix system
attached to the base station. The user’s name is
displayed on the top LCD if the base station is attached
to a matrix system.

The on/off/volume control, talk and listen buttons, talk
and listen lights, low battery indicator, microphone
audio level indicator are located on the top panel.

Transmit and receive antennas are attached to the
RKP-4. Either or both unscrew for field replacement
but are not coaxial connectors.

The RKP-4 beltpack can be powered by AA Alkaline
or a Nickel-Metal Hydride Battery pack.

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Controls and Connections

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1. On/Off & Volume Control – Turns the beltpack power on and controls

headset volume.

2. [UP] and [DOWN] buttons - Used to select menus and set options on the

LCD.

3. LCD display.

4. BAT/O.M. Light –

Battery - Light flashes on power up = Battery OK

Microphone Lvl: Light flashes on loudest speech = Gain OK
Light flashes on all speech = Gain too High

Light never flashes on loudest speech = Gain too Low

5. [COPY] button – Used to assign incoming calls from a digital matrix to

front panel talk and listen buttons.

6. Listen Buttons –Used to listen to audio from the assigned matrix user for

that button

7. Talk Buttons – Used to talk to the assigned matrix user for that button.

Light on continuously = Battery Low
Light does not flash or come on = Battery Dead

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8. [MENU] and [SET] buttons – Used to select menus and set options

on the LCD.

9. LCD display.

10. [UP] and [DOWN] buttons - Used to select menus and set options on

the LCD.

11. Push-to-Talk/Push-to-Transmit Switch – Does nothing in the RKP-

4. The transmitter is always up.

12. Headset Connector – XLR Plug for Telex units, XLR Receptacle for

RTS units.

13. Battery Latch – Press down to enable the battery pack to be released.

While the latch is held down, slide the battery pack about 1/8 inch
back, toward the latch, until it stops, then lift out.

14. Receive and Transmit Antennas – The antennas are screw type, ¼

wave, replaceable antennas. The color dot on the screw end of the
antenna must match color dot on antenna receptacle.

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